File size: 946 Bytes
a9e7957 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | {
"name": "costas_array_n11__v1_nh",
"problem_type": "costas_array",
"params": {
"n": 11
},
"prompt": "Find a Costas array of order 11: place 11 marks on an 11x11 grid, one per row and one per column, such that all 11*(10)/2 displacement vectors (dr, dc) between pairs of marks (with dc > 0) are pairwise distinct.\n\nReturn x as a list of 11 integers in 0..10, where x[c] is the row of the mark in column c (permutation), or state \"UNSATISFIABLE\" if no such array exists.",
"satisfiable": true,
"solution": {
"x": [
9,
3,
8,
4,
1,
0,
7,
2,
5,
6,
10
]
},
"difficulty": {
"solve_time_ms": 1035.3,
"search_space": 39916800,
"num_variables": 11,
"num_constraints": 12,
"num_edges": -1,
"backend": "pycsp",
"solve_tier": "hard",
"solve_pct_global": 73.12,
"solve_pct_type": 61.11
},
"partial_assignment": null
}
|