uid stringlengths 9 18 | source stringclasses 2
values | native_id stringlengths 3 7 | title stringlengths 2 64 | url stringlengths 36 49 | tags listlengths 0 11 | time_limit_ms null | memory_limit_mb null | io_type stringclasses 1
value | difficulty_rating int64 800 3.5k ⌀ | stats dict | last_scraped_at stringclasses 2
values |
|---|---|---|---|---|---|---|---|---|---|---|---|
codeforces:427-D | codeforces | 427-D | Match & Catch | https://codeforces.com/problemset/problem/427/D | [
"dp",
"string suffix structures",
"strings"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 2743
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:427-C | codeforces | 427-C | Checkposts | https://codeforces.com/problemset/problem/427/C | [
"dfs and similar",
"graphs",
"two pointers"
] | null | null | stdin_stdout | 1,700 | {
"solved_count": 17687
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:427-B | codeforces | 427-B | Prison Transfer | https://codeforces.com/problemset/problem/427/B | [
"data structures",
"implementation"
] | null | null | stdin_stdout | 1,100 | {
"solved_count": 15620
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:427-A | codeforces | 427-A | Police Recruits | https://codeforces.com/problemset/problem/427/A | [
"implementation"
] | null | null | stdin_stdout | 800 | {
"solved_count": 100188
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:426-B | codeforces | 426-B | Sereja and Mirroring | https://codeforces.com/problemset/problem/426/B | [
"implementation"
] | null | null | stdin_stdout | 1,300 | {
"solved_count": 3984
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:426-A | codeforces | 426-A | Sereja and Mugs | https://codeforces.com/problemset/problem/426/A | [
"implementation"
] | null | null | stdin_stdout | 800 | {
"solved_count": 10069
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:425-E | codeforces | 425-E | Sereja and Sets | https://codeforces.com/problemset/problem/425/E | [
"dp"
] | null | null | stdin_stdout | 2,500 | {
"solved_count": 850
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:425-D | codeforces | 425-D | Sereja and Squares | https://codeforces.com/problemset/problem/425/D | [
"binary search",
"data structures",
"hashing"
] | null | null | stdin_stdout | 2,300 | {
"solved_count": 1677
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:425-C | codeforces | 425-C | Sereja and Two Sequences | https://codeforces.com/problemset/problem/425/C | [
"data structures",
"dp"
] | null | null | stdin_stdout | 2,300 | {
"solved_count": 1017
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:425-B | codeforces | 425-B | Sereja and Table | https://codeforces.com/problemset/problem/425/B | [
"bitmasks",
"greedy"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 1449
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:425-A | codeforces | 425-A | Sereja and Swaps | https://codeforces.com/problemset/problem/425/A | [
"brute force",
"sortings"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 4195
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:424-E | codeforces | 424-E | Colored Jenga | https://codeforces.com/problemset/problem/424/E | [
"dfs and similar",
"dp",
"probabilities"
] | null | null | stdin_stdout | 2,500 | {
"solved_count": 151
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:424-D | codeforces | 424-D | Biathlon Track | https://codeforces.com/problemset/problem/424/D | [
"binary search",
"brute force",
"constructive algorithms",
"data structures",
"dp"
] | null | null | stdin_stdout | 2,300 | {
"solved_count": 639
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:424-C | codeforces | 424-C | Magic Formulas | https://codeforces.com/problemset/problem/424/C | [
"math"
] | null | null | stdin_stdout | 1,600 | {
"solved_count": 6019
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:424-B | codeforces | 424-B | Megacity | https://codeforces.com/problemset/problem/424/B | [
"binary search",
"greedy",
"implementation",
"sortings"
] | null | null | stdin_stdout | 1,200 | {
"solved_count": 8525
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:424-A | codeforces | 424-A | Squats | https://codeforces.com/problemset/problem/424/A | [
"implementation"
] | null | null | stdin_stdout | 900 | {
"solved_count": 9319
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:421-D | codeforces | 421-D | Bug in Code | https://codeforces.com/problemset/problem/421/D | [
"binary search",
"data structures",
"sortings"
] | null | null | stdin_stdout | 1,900 | {
"solved_count": 708
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:421-A | codeforces | 421-A | Pasha and Hamsters | https://codeforces.com/problemset/problem/421/A | [
"constructive algorithms",
"implementation"
] | null | null | stdin_stdout | 800 | {
"solved_count": 6972
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:420-E | codeforces | 420-E | Playing the ball | https://codeforces.com/problemset/problem/420/E | [
"geometry"
] | null | null | stdin_stdout | 2,600 | {
"solved_count": 324
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:420-D | codeforces | 420-D | Cup Trick | https://codeforces.com/problemset/problem/420/D | [
"data structures"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 1038
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:420-C | codeforces | 420-C | Bug in Code | https://codeforces.com/problemset/problem/420/C | [
"data structures",
"graphs",
"implementation",
"two pointers"
] | null | null | stdin_stdout | 1,900 | {
"solved_count": 1426
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:420-B | codeforces | 420-B | Online Meeting | https://codeforces.com/problemset/problem/420/B | [
"implementation"
] | null | null | stdin_stdout | 1,800 | {
"solved_count": 1176
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:420-A | codeforces | 420-A | Start Up | https://codeforces.com/problemset/problem/420/A | [
"implementation"
] | null | null | stdin_stdout | 1,000 | {
"solved_count": 7187
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:418-E | codeforces | 418-E | Tricky Password | https://codeforces.com/problemset/problem/418/E | [
"data structures"
] | null | null | stdin_stdout | 3,100 | {
"solved_count": 467
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:418-D | codeforces | 418-D | Big Problems for Organizers | https://codeforces.com/problemset/problem/418/D | [
"data structures",
"graphs",
"trees"
] | null | null | stdin_stdout | 2,800 | {
"solved_count": 589
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:417-E | codeforces | 417-E | Square Table | https://codeforces.com/problemset/problem/417/E | [
"constructive algorithms",
"math",
"probabilities"
] | null | null | stdin_stdout | 2,400 | {
"solved_count": 964
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:417-D | codeforces | 417-D | Cunning Gena | https://codeforces.com/problemset/problem/417/D | [
"bitmasks",
"dp",
"greedy",
"sortings"
] | null | null | stdin_stdout | 1,900 | {
"solved_count": 3005
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:417-C | codeforces | 417-C | Football | https://codeforces.com/problemset/problem/417/C | [
"constructive algorithms",
"graphs",
"implementation"
] | null | null | stdin_stdout | 1,400 | {
"solved_count": 5117
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:417-B | codeforces | 417-B | Crash | https://codeforces.com/problemset/problem/417/B | [
"implementation"
] | null | null | stdin_stdout | 1,400 | {
"solved_count": 2046
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:417-A | codeforces | 417-A | Elimination | https://codeforces.com/problemset/problem/417/A | [
"dp",
"implementation",
"math"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 3441
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:416-E | codeforces | 416-E | President's Path | https://codeforces.com/problemset/problem/416/E | [
"dp",
"graphs",
"shortest paths"
] | null | null | stdin_stdout | 2,500 | {
"solved_count": 1890
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:416-D | codeforces | 416-D | Population Size | https://codeforces.com/problemset/problem/416/D | [
"greedy",
"implementation",
"math"
] | null | null | stdin_stdout | 2,400 | {
"solved_count": 1162
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:416-C | codeforces | 416-C | Booking System | https://codeforces.com/problemset/problem/416/C | [
"binary search",
"dp",
"greedy",
"implementation"
] | null | null | stdin_stdout | 1,600 | {
"solved_count": 8826
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:416-B | codeforces | 416-B | Art Union | https://codeforces.com/problemset/problem/416/B | [
"brute force",
"dp",
"implementation"
] | null | null | stdin_stdout | 1,300 | {
"solved_count": 9479
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:416-A | codeforces | 416-A | Guess a number! | https://codeforces.com/problemset/problem/416/A | [
"greedy",
"implementation",
"two pointers"
] | null | null | stdin_stdout | 1,400 | {
"solved_count": 10178
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:415-B | codeforces | 415-B | Mashmokh and Tokens | https://codeforces.com/problemset/problem/415/B | [
"binary search",
"greedy",
"implementation",
"math"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 6736
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:415-A | codeforces | 415-A | Mashmokh and Lights | https://codeforces.com/problemset/problem/415/A | [
"implementation"
] | null | null | stdin_stdout | 900 | {
"solved_count": 9675
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:414-E | codeforces | 414-E | Mashmokh's Designed Problem | https://codeforces.com/problemset/problem/414/E | [
"data structures"
] | null | null | stdin_stdout | 3,200 | {
"solved_count": 267
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:414-D | codeforces | 414-D | Mashmokh and Water Tanks | https://codeforces.com/problemset/problem/414/D | [
"binary search",
"data structures",
"greedy",
"trees",
"two pointers"
] | null | null | stdin_stdout | 2,300 | {
"solved_count": 780
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:414-C | codeforces | 414-C | Mashmokh and Reverse Operation | https://codeforces.com/problemset/problem/414/C | [
"combinatorics",
"divide and conquer"
] | null | null | stdin_stdout | 2,100 | {
"solved_count": 2409
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:414-B | codeforces | 414-B | Mashmokh and ACM | https://codeforces.com/problemset/problem/414/B | [
"combinatorics",
"dp",
"number theory"
] | null | null | stdin_stdout | 1,400 | {
"solved_count": 30632
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:414-A | codeforces | 414-A | Mashmokh and Numbers | https://codeforces.com/problemset/problem/414/A | [
"constructive algorithms",
"number theory"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 10631
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:413-E | codeforces | 413-E | Maze 2D | https://codeforces.com/problemset/problem/413/E | [
"data structures",
"divide and conquer"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 875
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:413-D | codeforces | 413-D | 2048 | https://codeforces.com/problemset/problem/413/D | [
"bitmasks",
"dp"
] | null | null | stdin_stdout | 2,000 | {
"solved_count": 938
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:413-C | codeforces | 413-C | Jeopardy! | https://codeforces.com/problemset/problem/413/C | [
"greedy",
"math"
] | null | null | stdin_stdout | 1,400 | {
"solved_count": 2699
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:413-B | codeforces | 413-B | Spyke Chatting | https://codeforces.com/problemset/problem/413/B | [
"implementation"
] | null | null | stdin_stdout | 1,300 | {
"solved_count": 1864
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:413-A | codeforces | 413-A | Data Recovery | https://codeforces.com/problemset/problem/413/A | [
"implementation"
] | null | null | stdin_stdout | 1,200 | {
"solved_count": 3032
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:412-E | codeforces | 412-E | E-mail Addresses | https://codeforces.com/problemset/problem/412/E | [
"implementation"
] | null | null | stdin_stdout | 1,900 | {
"solved_count": 945
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:412-D | codeforces | 412-D | Giving Awards | https://codeforces.com/problemset/problem/412/D | [
"dfs and similar"
] | null | null | stdin_stdout | 2,000 | {
"solved_count": 2518
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:412-C | codeforces | 412-C | Pattern | https://codeforces.com/problemset/problem/412/C | [
"implementation",
"strings"
] | null | null | stdin_stdout | 1,200 | {
"solved_count": 4272
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:412-B | codeforces | 412-B | Network Configuration | https://codeforces.com/problemset/problem/412/B | [
"greedy",
"sortings"
] | null | null | stdin_stdout | 900 | {
"solved_count": 6477
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:412-A | codeforces | 412-A | Poster | https://codeforces.com/problemset/problem/412/A | [
"greedy",
"implementation"
] | null | null | stdin_stdout | 900 | {
"solved_count": 5076
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:411-C | codeforces | 411-C | Kicker | https://codeforces.com/problemset/problem/411/C | [
"*special",
"implementation"
] | null | null | stdin_stdout | 1,700 | {
"solved_count": 1305
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:411-B | codeforces | 411-B | Multi-core Processor | https://codeforces.com/problemset/problem/411/B | [
"implementation"
] | null | null | stdin_stdout | 1,600 | {
"solved_count": 1424
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:411-A | codeforces | 411-A | Password Check | https://codeforces.com/problemset/problem/411/A | [
"*special",
"implementation"
] | null | null | stdin_stdout | 800 | {
"solved_count": 8217
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-I | codeforces | 409-I | Feed the Golorp | https://codeforces.com/problemset/problem/409/I | [
"*special"
] | null | null | stdin_stdout | 2,400 | {
"solved_count": 169
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-H | codeforces | 409-H | A + B Strikes Back | https://codeforces.com/problemset/problem/409/H | [
"*special",
"brute force",
"constructive algorithms",
"dsu",
"implementation"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 9578
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-G | codeforces | 409-G | On a plane | https://codeforces.com/problemset/problem/409/G | [
"*special",
"geometry"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 575
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-F | codeforces | 409-F | 000001 | https://codeforces.com/problemset/problem/409/F | [
"*special"
] | null | null | stdin_stdout | 1,900 | {
"solved_count": 2184
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-E | codeforces | 409-E | Dome | https://codeforces.com/problemset/problem/409/E | [
"*special"
] | null | null | stdin_stdout | 1,800 | {
"solved_count": 621
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-D | codeforces | 409-D | Big Data | https://codeforces.com/problemset/problem/409/D | [
"*special"
] | null | null | stdin_stdout | 1,700 | {
"solved_count": 1810
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-C | codeforces | 409-C | Magnum Opus | https://codeforces.com/problemset/problem/409/C | [
"*special"
] | null | null | stdin_stdout | 1,700 | {
"solved_count": 2146
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-B | codeforces | 409-B | Mysterious Language | https://codeforces.com/problemset/problem/409/B | [
"*special"
] | null | null | stdin_stdout | 1,700 | {
"solved_count": 1435
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:409-A | codeforces | 409-A | The Great Game | https://codeforces.com/problemset/problem/409/A | [
"*special"
] | null | null | stdin_stdout | 1,700 | {
"solved_count": 2639
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:408-B | codeforces | 408-B | Garland | https://codeforces.com/problemset/problem/408/B | [
"implementation"
] | null | null | stdin_stdout | 1,200 | {
"solved_count": 10448
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:408-A | codeforces | 408-A | Line to Cashier | https://codeforces.com/problemset/problem/408/A | [
"implementation"
] | null | null | stdin_stdout | 900 | {
"solved_count": 12118
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:407-E | codeforces | 407-E | k-d-sequence | https://codeforces.com/problemset/problem/407/E | [
"data structures"
] | null | null | stdin_stdout | 3,100 | {
"solved_count": 1361
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:407-D | codeforces | 407-D | Largest Submatrix 3 | https://codeforces.com/problemset/problem/407/D | [
"dp",
"hashing"
] | null | null | stdin_stdout | 2,700 | {
"solved_count": 843
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:407-C | codeforces | 407-C | Curious Array | https://codeforces.com/problemset/problem/407/C | [
"brute force",
"combinatorics",
"implementation",
"math"
] | null | null | stdin_stdout | 2,500 | {
"solved_count": 1242
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:407-B | codeforces | 407-B | Long Path | https://codeforces.com/problemset/problem/407/B | [
"dp",
"implementation"
] | null | null | stdin_stdout | 1,600 | {
"solved_count": 7239
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:407-A | codeforces | 407-A | Triangle | https://codeforces.com/problemset/problem/407/A | [
"brute force",
"geometry",
"implementation",
"math"
] | null | null | stdin_stdout | 1,600 | {
"solved_count": 5208
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:406-E | codeforces | 406-E | Hamming Triples | https://codeforces.com/problemset/problem/406/E | [
"implementation",
"math",
"two pointers"
] | null | null | stdin_stdout | 2,800 | {
"solved_count": 399
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:406-D | codeforces | 406-D | Hill Climbing | https://codeforces.com/problemset/problem/406/D | [
"dfs and similar",
"geometry",
"trees"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 1317
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:405-E | codeforces | 405-E | Graph Cutting | https://codeforces.com/problemset/problem/405/E | [
"dfs and similar",
"graphs"
] | null | null | stdin_stdout | 2,300 | {
"solved_count": 1661
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:405-D | codeforces | 405-D | Toy Sum | https://codeforces.com/problemset/problem/405/D | [
"greedy",
"implementation",
"math"
] | null | null | stdin_stdout | 1,700 | {
"solved_count": 3298
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:405-C | codeforces | 405-C | Unusual Product | https://codeforces.com/problemset/problem/405/C | [
"implementation",
"math"
] | null | null | stdin_stdout | 1,600 | {
"solved_count": 4970
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:405-B | codeforces | 405-B | Domino Effect | https://codeforces.com/problemset/problem/405/B | [] | null | null | stdin_stdout | 1,100 | {
"solved_count": 6143
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:405-A | codeforces | 405-A | Gravity Flip | https://codeforces.com/problemset/problem/405/A | [
"greedy",
"implementation",
"sortings"
] | null | null | stdin_stdout | 900 | {
"solved_count": 130378
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:404-E | codeforces | 404-E | Maze 1D | https://codeforces.com/problemset/problem/404/E | [
"binary search",
"greedy",
"implementation"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 664
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:404-D | codeforces | 404-D | Minesweeper 1D | https://codeforces.com/problemset/problem/404/D | [
"dp",
"implementation"
] | null | null | stdin_stdout | 1,900 | {
"solved_count": 2498
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:404-C | codeforces | 404-C | Restore Graph | https://codeforces.com/problemset/problem/404/C | [
"dfs and similar",
"graphs",
"sortings"
] | null | null | stdin_stdout | 1,800 | {
"solved_count": 5865
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:404-B | codeforces | 404-B | Marathon | https://codeforces.com/problemset/problem/404/B | [
"implementation",
"math"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 3061
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:404-A | codeforces | 404-A | Valera and X | https://codeforces.com/problemset/problem/404/A | [
"implementation"
] | null | null | stdin_stdout | 1,000 | {
"solved_count": 26459
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:403-E | codeforces | 403-E | Two Rooted Trees | https://codeforces.com/problemset/problem/403/E | [
"data structures",
"implementation",
"trees"
] | null | null | stdin_stdout | 2,900 | {
"solved_count": 280
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:403-D | codeforces | 403-D | Beautiful Pairs of Numbers | https://codeforces.com/problemset/problem/403/D | [
"combinatorics",
"dp"
] | null | null | stdin_stdout | 2,300 | {
"solved_count": 1258
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:402-E | codeforces | 402-E | Strictly Positive Matrix | https://codeforces.com/problemset/problem/402/E | [
"graphs",
"math"
] | null | null | stdin_stdout | 2,200 | {
"solved_count": 2369
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:402-D | codeforces | 402-D | Upgrading Array | https://codeforces.com/problemset/problem/402/D | [
"dp",
"greedy",
"math",
"number theory"
] | null | null | stdin_stdout | 1,800 | {
"solved_count": 2806
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:402-C | codeforces | 402-C | Searching for Graph | https://codeforces.com/problemset/problem/402/C | [
"brute force",
"constructive algorithms",
"graphs"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 6438
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:402-B | codeforces | 402-B | Trees in a Row | https://codeforces.com/problemset/problem/402/B | [
"brute force",
"implementation"
] | null | null | stdin_stdout | 1,400 | {
"solved_count": 4009
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:402-A | codeforces | 402-A | Nuts | https://codeforces.com/problemset/problem/402/A | [
"greedy",
"math"
] | null | null | stdin_stdout | 1,100 | {
"solved_count": 4915
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:401-D | codeforces | 401-D | Roman and Numbers | https://codeforces.com/problemset/problem/401/D | [
"bitmasks",
"brute force",
"combinatorics",
"dp",
"number theory"
] | null | null | stdin_stdout | 2,000 | {
"solved_count": 4758
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:401-C | codeforces | 401-C | Team | https://codeforces.com/problemset/problem/401/C | [
"constructive algorithms",
"greedy",
"implementation"
] | null | null | stdin_stdout | 1,400 | {
"solved_count": 22012
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:401-B | codeforces | 401-B | Sereja and Contests | https://codeforces.com/problemset/problem/401/B | [
"greedy",
"implementation",
"math"
] | null | null | stdin_stdout | 1,200 | {
"solved_count": 4640
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:401-A | codeforces | 401-A | Vanya and Cards | https://codeforces.com/problemset/problem/401/A | [
"implementation",
"math"
] | null | null | stdin_stdout | 800 | {
"solved_count": 17562
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:400-E | codeforces | 400-E | Inna and Binary Logic | https://codeforces.com/problemset/problem/400/E | [
"binary search",
"bitmasks",
"data structures"
] | null | null | stdin_stdout | 2,100 | {
"solved_count": 1077
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:400-D | codeforces | 400-D | Dima and Bacteria | https://codeforces.com/problemset/problem/400/D | [
"dsu",
"graphs",
"shortest paths"
] | null | null | stdin_stdout | 2,000 | {
"solved_count": 3277
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:400-C | codeforces | 400-C | Inna and Huge Candy Matrix | https://codeforces.com/problemset/problem/400/C | [
"implementation",
"math"
] | null | null | stdin_stdout | 1,500 | {
"solved_count": 3033
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:400-B | codeforces | 400-B | Inna and New Matrix of Candies | https://codeforces.com/problemset/problem/400/B | [
"brute force",
"implementation",
"schedules"
] | null | null | stdin_stdout | 1,200 | {
"solved_count": 8691
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:400-A | codeforces | 400-A | Inna and Choose Options | https://codeforces.com/problemset/problem/400/A | [
"implementation"
] | null | null | stdin_stdout | 1,000 | {
"solved_count": 6946
} | 2026-08-10T02:20:32.917453+00:00 |
codeforces:399-B | codeforces | 399-B | Red and Blue Balls | https://codeforces.com/problemset/problem/399/B | [] | null | null | stdin_stdout | null | {
"solved_count": 1888
} | 2026-08-10T02:20:32.917453+00:00 |
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