problem_id
stringclasses
428 values
submission_id
stringlengths
10
10
status
stringclasses
2 values
code
stringlengths
5
816
p02777
s361685317
Accepted
s, t = map(str, input().split()) a, b = map(int, input().split()) u = input() if u == s: print(a-1, b) else: print(a, b-1)
p02665
s411252775
Wrong Answer
N = int(input()) A = list(map(int, input().split())) last = A[-1] count = last root = 1 for i in range(N): if root <= A[i]: print(-1) break if i+1 == N and root-A[i] > A[i+1]: root = last + A[i] elif root-A[i] > (last + A[i+1]): root = (last + A[i+1]) + A[i] count+=root root = (root-A[i])*2 else: if count == 0 or root < last: count = -1 print(count)
p02797
s091936869
Accepted
n,k,s = map(int, input().split()) if s!=10**9: x = [10**9]*n else: x = [1]*n for i in range(k): x[i]=s print(*x)
p02664
s042432152
Wrong Answer
s = input() t = '' if s[0] == '?': t = 'P' else: t = s[0] for i in range(1, len(s)): if s[i] == '?': if t[-1] == 'P': t += 'D' else: t += 'P' else: t += s[i] print(t)
p02801
s736033699
Accepted
C = str(input()) print(chr(ord(C)+1))
p03077
s906265441
Accepted
trans = [] n = int(input()) for i in range(5): trans.append(int(input())) m=min(trans) if n%m==0: print(n//m+4) else: print(n//m+5)
p03557
s464012202
Accepted
import bisect n = int(input()) A = list(map(int, input().split())) B = list(map(int, input().split())) C = list(map(int, input().split())) A.sort() B.sort() C.sort() count = 0 for j in range(n): i = bisect.bisect_left(A, B[j]) k = bisect.bisect(C, B[j]) count += (i * (n - k)) print(count)
p02613
s613573618
Accepted
n = int(input()) L = list(str(input()) for _ in range(n)) print('AC x', L.count('AC')) print('WA x', L.count('WA')) print('TLE x', L.count('TLE')) print('RE x', L.count('RE'))
p02916
s443170419
Accepted
n = int(input()) a = list(map(int, input().split())) b = list(map(int, input().split())) c = list(map(int, input().split())) manzoku = 0 for i in range(n): manzoku += b[a[i]-1] if i != 0: if (a[i]==a[i-1]+1): manzoku += c[a[i-1]-1] print(manzoku)
p02603
s924402230
Accepted
#dt = {} for i in x: dt[i] = dt.get(i,0)+1 import sys;input = sys.stdin.readline inp,ip = lambda :int(input()),lambda :[int(w) for w in input().split()] n = inp() x = ip() i = 0 ct = 1000 while i < n-1: while i < (n - 1) and x[i + 1] <= x[i]: i += 1 if i == n - 1: break buy = i i += 1 while i < n and x[i] >= x[i - 1]: i += 1 sell = i - 1 no = ct//x[buy] profit = no*(x[sell]-x[buy]) ct += profit print(ct)
p02663
s342426795
Wrong Answer
H1, M1, H2, M2, K = input().split() H1, M1, H2, M2, K = int(H1), int(M1), int(H2), int(M2), int(K) allm1 = H1*60+M1 allm2 = H2*60+M2 m = allm2 - allm1 if m == K: print('0') exit() i = 0 while True: m = m - K if m <= 0: break else: i = i + 1 print(i*K)
p03206
s412233357
Accepted
import sys import math import itertools import collections import heapq import re import numpy as np rr = lambda: sys.stdin.readline().rstrip() rs = lambda: sys.stdin.buffer.readline().split() ri = lambda: int(sys.stdin.readline()) rm = lambda: map(int, sys.stdin.buffer.readline().split()) rl = lambda: list(map(int, sys.stdin.readline().split())) inf = float('inf') mod = 10**9 + 7 s = ri() print(['Christmas Eve Eve Eve', 'Christmas Eve Eve', 'Christmas Eve', 'Christmas'][s-22])
p03486
s632106440
Wrong Answer
s = sorted(input(), reverse = True) t = sorted(input(), reverse = True) larger = len(s) if len(s) > len(t) else len(t) try: for i in range(larger): if s[i] > t[i]: print('No') break elif s[i] < t[i]: print('Yes') break else: print('No') except: if len(s) < len(t): print('Yes') else: print('No')
p03324
s425675403
Accepted
D, N = map(int, input().split()) if N == 100: print(101 * 100 ** D) else: print(N * 100 ** D)
p02753
s557250822
Accepted
S = list(input()) if (len(set(S)) == 1): ans = 'No' else: ans = 'Yes' print(ans)
p02555
s937239857
Wrong Answer
num=int(input()) count=0 if(num<3): count=0 elif(num>=6): for i in range(3,num//2): count+=1 if(num%2==0): count=count*2+2 else: count=count*2+1+2 elif(num>2 and num<6): count=1 print(count%(10**9+7))
p02688
s572821546
Accepted
n, k = map(int,input().split()) n_k = [0 for i in range(n)] for i in range(k): _n = int(input()) _k = list(map(int, input().split())) for i in _k: n_k[i-1] += 1 print(len([1 for i in n_k if i==0]))
p02612
s108541935
Accepted
n = int(input()) print(-n % 1000)
p03386
s702996377
Accepted
a, b, k = [int(x) for x in input().split()] r = range(a, b + 1) for i in sorted(set(r[:k]) | set(r[-k:])): print(i)
p03136
s783940575
Accepted
n = int(input()) a = [int(e) for e in input().split()] ans ='No' if max(a)>= sum([e for e in a])-max(a) else 'Yes' print(ans)
p03910
s122450242
Accepted
def main(): n = int(input()) max, dif = 0, 0 for i in range(1, 10000): s = i * (i + 1) // 2 if s >= n: max = i dif = s - n break [print(i) for i in range(1, max + 1) if i != dif] if __name__ == '__main__': main()
p02624
s027807733
Accepted
#別解思考 n = int(input()) res = 0 for i in range(1, n // 2 +1): res += (int(n / i) * (i + int(n / i) * i)) // 2 res += (n + n // 2 +1) * (n - n // 2 ) //2 print(res)
p04043
s470027947
Accepted
a, b, c = map(int, input().split()) iroha = [a, b, c] if iroha.count(5) == 2 and iroha.count(7) == 1: print("YES") else: print("NO")
p03103
s443060893
Accepted
N, M = [int(i) for i in input().split()] AB = [] for _ in range(N): AB.append([int(i) for i in input().split()]) AB = sorted(AB) money = 0 for i in AB: a = M - i[1] if a > 0: M = a money += i[1]*i[0] else: money += M*i[0] break print(money)
p04033
s312107697
Wrong Answer
a,b=map(int,input().split()) if a<0 and b<0: aa=a%2 bb=b%2 if (aa+bb)%2==1: print("Positive") else: print("Negative") exit() if a<=0 or 0<=b: print("Zero") exit() if 0<a and 0<b: print("Positive") exit()
p03067
s318262148
Accepted
a,b,c=map(int,input().split()) print("Yes" if a<=c<=b or b<=c<=a else "No" )
p03860
s188013929
Accepted
if __name__ == "__main__": str = input() a,b,c = str.split() print(a[0]+b[0]+c[0])
p03448
s392498372
Wrong Answer
a=int(input()) b=int(input()) c=int(input()) x=int(input()) cnt=0 for i in range(a+1): for j in range(b+1): for k in range(c+1): if a*500+b*100+c*50==x: cnt+=1 print(cnt)
p02730
s254650333
Accepted
frag=0 a = list(input()) N=len(a)-1 for i in range(int(N/2)): if a[i]!=a[N-i]: frag=1 break if frag==0: for i in range(int(N/4)): if a[i]!=a[int(N/2-i-1)] or a[N-i]!=a[int(N/2+i+1)]: frag=1 break if frag==0: print('Yes') else: print('No')
p03086
s937463686
Wrong Answer
s = input() valid_chars = ["A", "C", "G", "T"] tmp_ans = 0 ans = 0 for c in s: if c in valid_chars: tmp_ans += 1 else: ans = max(tmp_ans, ans) tmp_ans = 0 print(ans)
p03852
s796307455
Accepted
c = input() print('vowel' if 'a' in c or 'i' in c or 'u' in c or 'e' in c or 'o' in c else 'consonant')
p03211
s773338369
Wrong Answer
S=str(input()) min_dif = 1000 for i in range(len(S)-2): dif = int(S[i:i+3]) if min_dif > dif: min_dif = dif print(dif)
p03339
s156054993
Accepted
N=int(input()) S=input() a=S.count("E") c=a for s in S: if s=="E": c-=1 else: c+=1 a=min(a,c) print(a)
p03761
s255945662
Wrong Answer
n = int(input()) S = list(input() for _ in range(n)) if n == 1: print() else: def intersect_list(l1, l2): arr = [] lst = l1.copy() for element in l2: try: lst.remove(element) except ValueError: pass else: arr.append(element) return arr l = intersect_list(list(S[0]), list(S[1])) for i in range(2, n): l = intersect_list(l, list(S[i])) l.sort() print("".join(l))
p03556
s488740439
Wrong Answer
n=int(input()) if n==0: print(0) exit() for i in range(n): if i**2 > n: print((i-1)**2) break
p02796
s277747682
Accepted
n = int(input()) itv = [] for i in range(n): x,l = map(int,input().split()) itv.append([x+l-0.1,x-l+0.1]) itv.sort() ass = 0 tt = -float("inf") for i in range(n): if tt < itv[i][1]: ass += 1 tt = itv[i][0] print(ass)
p03556
s496206830
Accepted
n = int(input()) i = 0 while i**2 <= n: i += 1 print((i-1)**2)
p02664
s835501784
Accepted
import sys sys.setrecursionlimit(10 ** 7) rl = sys.stdin.readline def solve(): T = rl().rstrip() ans = [] for ti in T: if ti == '?': ans.append('D') else: ans.append(ti) print(''.join(ans)) if __name__ == '__main__': solve()
p02631
s271049319
Accepted
N = int(input()) A = [int(i) for i in input().split()] X = 0 for a in A: X = X ^ a for a in A: print(X ^ a, end=" ")
p03206
s203953266
Accepted
import sys INPUT = lambda: sys.stdin.readline().rstrip() INT = lambda: int(INPUT()) sys.setrecursionlimit(10 ** 9) def main(): D = INT() print("Christmas" + " Eve"*(25 - D)) if __name__ == '__main__': main()
p02554
s017757822
Wrong Answer
#!/usr/bin/env pypy3 MODULUS = 10**9+7 N = int(input()) ret = pow(10, N, MODULUS) ret -= 2*pow(9, N, MODULUS) ret += pow(8, N, MODULUS) print(ret)
p03815
s976599497
Accepted
import math url = "https://atcoder.jp//contests/abc057/tasks/abc057_c" def main(): x = int(input()) ans, div = divmod(x, 11) ans *= 2 ans += math.ceil(div/6) print(ans) if __name__ == '__main__': main()
p02600
s687240153
Accepted
X = int(input()) if X < 600: print(8) elif X<800: print(7) elif X<1000: print(6) elif X<1200: print(5) elif X<1400: print(4) elif X<1600: print(3) elif X<1800: print(2) else: print(1)
p02957
s913492642
Accepted
A,B = map(int,input().split()) if((A+B)%2==0): print((A+B)//2) else: print("IMPOSSIBLE")
p02705
s525217133
Accepted
import math r = int(input()) print(r*2*math.pi)
p02989
s908573318
Accepted
N = int(input()) d = list(map(int, input().split())) d.sort() s, t = N//2-1, N//2 ans = d[t] - d[s] print(ans)
p02708
s766413706
Accepted
n,k = [int(x) for x in input().split()] a = [0] * (n + 1) for i in range(1,n+1): a[i] = a[i-1] + i #print(a) res = 0 for i in range(k,n+1): ma = a[n] - a[n-i] mi = a[i-1] res += ma - mi + 1 #print(i,res,ma,mi) res += 1 res %= 10 ** 9 + 7 print(res)
p03485
s177221449
Accepted
import math a, b = map(int, input().split()) x = math.ceil((a + b) / 2) print(x)
p02866
s392336365
Wrong Answer
from collections import Counter mod = 998244353 n = int(input()) dl = list(map(int, input().split())) c = Counter(dl) if c[0]!=1: print(0) exit() for x in range(max(dl)+1): if c[x]==0: print(0) exit() res = 1 for x in range(max(dl)): res *= pow(c[x],c[x+1],mod) res %= mod print(res)
p02612
s775256261
Accepted
n = int(input()) if n%1000 > 0: print(1000-n%1000) else: print(0)
p02838
s368721504
Accepted
n=int(input()) a=list(map(int,input().split())) mod=10**9+7 c=[0]*60 for aa in a: for i in range(60): if aa&(1<<i):c[i]+=1 ans=0 for i,cc in enumerate(c): ans+=cc*(n-cc)*2**i ans%=mod print(ans)
p03359
s844230646
Accepted
a, b = map(int, input().split()) ans = a if a > b: ans -= 1 print(ans)
p03359
s695453333
Accepted
from sys import stdin, stdout def main(): line = stdin.readline() parts = line.split() mes = int(parts[0]) dia = int(parts[1]) stdout.write(str(mes if dia>=mes else mes-1)) main()
p02917
s271225497
Wrong Answer
n=int(input()) b=list(map(int,input().split())) a=[] a.append(b[0]) for i in range(1,n-1): if b[i]<b[i-1]: a[i-1]=b[i] a.append(b[i]) print(sum(a))
p03723
s306575649
Accepted
a, b, c = map(int, input().split()) if a == b and a == c: if a % 2 == 1: print(0) exit() else: print(-1) exit() ans = 0 s, t, u = 0, 0, 0 while a%2==0 and b%2==0 and c%2==0: s = b//2 + c//2 t = a//2 + c//2 u = a//2 + b//2 a, b, c = s, t, u ans += 1 print(ans)
p03612
s471993295
Accepted
#解説見た n = int(input()) p = list(map(int, input().split())) p.append(0) ans = 0 for i in range(n): if p[i] == (i+1): p[i],p[i+1] = p[i+1], p[i] ans += 1 print(ans)
p02819
s762913698
Accepted
from math import sqrt def IsPrime(num): if num < 2: return True elif num == 2: return True elif num % 2 == 0: return False sqrtNum = sqrt(num) for i in range(3, int(sqrtNum) + 1, 2): if num % i == 0: return False return True if __name__ == "__main__": x = int(input()) for i in range(x, 10**5+4): if IsPrime(i): print(i) exit()
p02691
s054760481
Wrong Answer
import itertools a=int(input()) ct=0 b=list(map(int,input().split())) n=list(range(len(b))) c=list(itertools.permutations(n,2)) for i in range(len(c)): e=c[i][0] f=c[i][1] if b[e]+b[f]==abs(e-f): ct+=1 print(ct/2)
p02819
s202286319
Wrong Answer
x=int(input()) def prime(n): for i in range(2, 100000): if n % i == 0: return False else: return True while prime(x) == False: x += 1 print(x)
p02951
s145436036
Accepted
A, B, C = list(map(int, input().split())) if C-(A-B)<=0: print("0") else: print(C-(A-B))
p02813
s801507043
Accepted
import itertools N = int(input()) P = tuple(map(int, input().split())) Q = tuple(map(int, input().split())) num_list = [i+1 for i in range(N)] a = 1 for i in list(itertools.permutations(num_list)): if P==i: break else: a += 1 b = 1 for i in list(itertools.permutations(num_list)): if Q==i: break else: b += 1 if a-b>=0: print(a-b) else: print(-a+b)
p03472
s371077462
Wrong Answer
# coding: utf-8 from math import ceil N, H = map(int, input().split()) li = [] atop = 0 for _ in range(N): a, b = map(int, input().split()) atop = max(atop, a) li.append([a, b]) li.sort(key=lambda x: x[1], reverse=True) # print(li) ans = ceil(H/atop) cnt = 0 for i in range(N): H -= li[i][1] if H < 0: break cnt += 1 ans = min(ans, cnt + ceil(H/atop)) print(ans)
p03059
s608451985
Accepted
a,b,t=map(int,input().split()) bis=0 time=0 while time+a<t+0.5: bis+=b time+=a print(bis)
p02916
s153919902
Accepted
N = int(input()) A = list(map(int,input().split())) B = list(map(int,input().split())) C = list(map(int,input().split())) before = 10**3 ans = 0 for i in A: if i - before == 1: ans += C[before-1] before = i ans += sum(B) print(ans)
p02793
s439867091
Accepted
N = int(input()) A = [int(v) for v in input().split()] def gcd(v1, v2): if v2 == 0: return v1 return gcd(v2, v1 % v2) A.sort() a1 = A[0] for a2 in A[1:]: a3 = gcd(a1, a2) a1 = a1 * a2 // a3 v = a1 total = 0 for a in A: total += v // a # while total > 1000000007: # total -= 1000000007 total %= 1000000007 print(total)
p02572
s363919160
Wrong Answer
N = int(input()) A = list(map(int, input().split())) ans = 0 mod = 1e9 + 7 s = sum(A) % mod for i in range(N): s -= A[i] ans += A[i] * s ans = ans % mod print(int(ans))
p03623
s903129018
Accepted
x,a,b = [int(x) for x in input().split()] if abs(x-a) > abs(x-b): print("B") else: print("A")
p03625
s064369106
Accepted
import collections n = int(input()) a = [int(i) for i in input().split()] dic = collections.defaultdict(int) for i in range(n): dic[a[i]] += 1 ans = 0 ls = list(dic.keys()) ls.sort() ans_ls = [] for i in range(len(ls)-1,-1,-1): if dic[ls[i]] >= 2: ans_ls.append(ls[i]) if dic[ls[i]] >= 4: ans_ls.append(ls[i]) if len(ans_ls) < 2: print(0) else: print(ans_ls[0] * ans_ls[1])
p02659
s513580194
Accepted
a, b = input().split() print(int(a)*(round(float(b)*100))//100)
p03474
s670109652
Accepted
a,b=map(int,input().split()) s=input() if len(s)==a+b+1 and s[a]=='-' and s.count('-')==1: print('Yes') else: print('No')
p03795
s973827207
Accepted
N = int(input()) print(N * 800 - (N // 15) * 200 )
p02860
s079428552
Accepted
n=int(input()) s=input() m=0 if n%2==0: for i in range(n//2): if s[i]==s[i+n//2]: m+=1 print("Yes" if m==(n/2) else "No")
p03607
s974970201
Accepted
import collections n=int(input()) a=[] for _ in range(n): a.append(input()) c=collections.Counter(a) tmp=[] for k,v in c.items(): if v%2!=0: tmp.append(k) print(len(tmp))
p02951
s529272766
Accepted
(a, b, c) = map(int, input().split()) ans = max(0, c - (a - b)) print(ans)
p03416
s657115055
Accepted
def is_palindromic(N): N_reversed=list(str(N)) N_reversed.reverse() N_reversed=int(''.join(N_reversed)) if N_reversed==N: return True else: return False A,B=map(int,input().split()) count=0 for i in range(A,B+1): if is_palindromic(i): count+=1 print(count)
p02642
s108096566
Wrong Answer
N = int(input()) A = [int(x) for x in input().split()] ans = 0 for i in range(N): count = 0 for j in range(N): if A[i]%A[j] != 0 and i != j: count += 1 if count == N-1: ans += 1 print(ans)
p02951
s517022433
Accepted
a, b, c = map(int, input().split()) if c - (a-b) < 0: print("0") else: print(c-(a-b))
p02768
s854776638
Accepted
mod = 10**9 + 7 n, a, b = map(int, input().split()) total = pow(2, n, mod)-1 def mod_comb(n,k,p): if n<0 or k<0 or n<k: return 0 if n==0 or k==0: return 1 a = 1 b = 1 for i in range(k): a = (a*((n-i)%p))%p b = (b*((i+1)%p))%p return (a*pow(b,p-2,p))%p x = mod_comb(n, a, mod) y = mod_comb(n, b, mod) total = (total-x-y)%mod print(total)
p02618
s997646319
Accepted
for _ in range(365): print(1)
p03486
s983383643
Accepted
s = ''.join(sorted(list(input()))) t = ''.join(sorted(list(input()), reverse=True)) if s < t: print('Yes') else: print('No')
p02571
s864855663
Accepted
S=input() T=input() a=[] for i in range(len(S)-len(T)+1) : count=0 for j in range(len(T)) : if S[i:i+len(T)][j]==T[j] : count+=1 a.append(count) print(len(T)-max(a))
p02989
s452523884
Accepted
N=int(input()) D=list(map(int,input().split())) D.sort() K=D[N//2]-D[N//2-1] print(K)
p03814
s265848699
Accepted
def main(): S = input() L, R = 1001001, 0 for i in range(len(S)): if S[i] == 'A' and L > i: L = i if S[i] == 'Z' and R < i: R = i print(R - L + 1) if __name__ == '__main__': main()
p03760
s943826808
Wrong Answer
O=input() E=input() N=len(O) M=len(E) ans="" for i in range(N): ans+=O[i] if N-M==1 and i==M-1: break ans+=E[i] print(ans)
p02909
s225703111
Accepted
S = input() if S == "Sunny": print("Cloudy") elif S == "Cloudy": print("Rainy") else : print("Sunny")
p02873
s491311454
Wrong Answer
S=input() A=[0]*(len(S)+1) for i in range(len(S)): if S[i]=='<': A[i+1]=max(A[i+1],A[i]+1) for i in range(len(S)-1,0,-1): if S[i]=='>': A[i]=max(A[i],A[i+1]+1) print(sum(A))
p03261
s834944174
Wrong Answer
n = int(input()) w = [input() for i in range(n)] if len(set(w)) == n: for i in range(1, n): s0 = list(w[i - 1]) s1 = list(w[i]) if s1[0] == s0[-1]: pass else: print("NO") exit() print("Yes") else: print("No")
p03042
s857125249
Accepted
s=int(input()) a=s//100 b=s-a*100 if a<13 and b<13 and a>0 and b>0: print("AMBIGUOUS") elif a<13 and a>0: print("MMYY") elif b<13 and b>0: print("YYMM") else: print("NA")
p03861
s031182667
Accepted
a,b,x = map(int,input().split()) ans = b//x - (a-1)//x print(ans)
p03475
s683233518
Accepted
N = int(input()) CSF = [] import math for i in range(N-1): CSF.append(list(map(int,input().split()))) def time(t,i): if CSF[i][1] >= t: return CSF[i][1]+CSF[i][0] else: x = math.ceil((t-CSF[i][1])/CSF[i][2]) return CSF[i][1]+ x*CSF[i][2] + CSF[i][0] for i in range(N-1): t = CSF[i][0]+CSF[i][1] for j in range(i+1,N-1): t = time(t,j) print(t) print(0)
p04011
s183282130
Wrong Answer
# 入力 n = int(input()) k = int(input()) x = int(input()) y = int(input()) # 処理 first_stay = k * x second_stay = (n - k) * y total = first_stay + second_stay print(total)
p02790
s342630473
Accepted
a=sorted(input().split()) print(a[0]*int(a[1]))
p03323
s847461653
Accepted
a, b = map(int, input().split()) if a <= 8 and b <= 8: print("Yay!") else: print(":(")
p03910
s874805594
Accepted
n = int(input()) s = 0 for i in range(1, n+1): s += i if s >= n: break k = s-n ans = [] for j in range(1, i+1): if j == k: continue else: ans.append(j) ans = list(map(str, ans)) print('\n'.join(ans))
p03317
s910854218
Wrong Answer
import math def resolve(): n, k = map(int, input().split()) a = list(map(int, input().split())) i = a.index(min(a)) v = math.ceil(i/(k-1)) + math.ceil((n-1-i)/(k-1)) print(v) resolve()
p03485
s736549358
Accepted
import math a, b = map(int, input().split()) print(math.ceil((a+b)/2))
p02696
s251448360
Wrong Answer
a, b, n = map(int, input().split()) if n>=b: print(int(a*b/b) - a*int(b/b)) else: print(int(a*n/b) - a*int(n/b))
p03998
s511090784
Wrong Answer
s = [input() for _ in range(3)] d = {'a': 0, 'b': 1, 'c': 2} nxt, cnt = 0, [0, 0, 0] for _ in range(sum(len(si) for si in s)): now = nxt nxt = d[s[now][cnt[now]]] cnt[now] += 1 if len(s[nxt]) <= cnt[nxt]: print(['A', 'B', 'C'][now]) break
p03679
s062833180
Accepted
LI = lambda: list(map(int, input().split())) X, A, B = LI() def main(): x = B - A if x <= 0: ans = "delicious" elif x <= X: ans = "safe" else: ans = "dangerous" print(ans) if __name__ == "__main__": main()
p02555
s391636791
Accepted
n = int(input()) mod = 10 ** 9 + 7 dp = [0] * 2001 dp[3] = 1 dp[4] = 1 dp[5] = 1 if n >= 6: for i in range(6,n+1): dp[i] = (dp[i-1] + dp[i-3]) % mod print(dp[n])