제출 #689680

#제출 시각아이디문제언어결과실행 시간메모리
689680lohacho죄수들의 도전 (IOI22_prison)C++17
65 / 100
17 ms1108 KiB
#include "prison.h" #include <bits/stdc++.h> using namespace std; std::vector<std::vector<int>> devise_strategy(int N) { vector<vector<int>> ans(25, vector<int>(N + 1)); ans[0][0] = 0; int sz = 1; while(sz * 2 < N){ sz *= 2; } for(int i = 1; i <= sz; ++i){ ans[0][i] = 1; } for(int i = sz + 1; i <= N; ++i){ ans[0][i] = 2; } if(sz == 1){ ans[0][1] = -1; ans[0][2] = -2; } for(int i = 1; i < (int)ans.size(); ++i){ if(sz == 1){ break; } int know = (i - 1) / 2 % 2; ans[i][0] = 1 - know; for(int j = 1; j <= N; ++j){ if(i % 2 == (j - 1) / sz % 2){ ans[i][j] = -1 - (know ^ ((j - 1) / sz % 2) ^ 1); } else{ if(sz == 2){ ans[i][j] = -1 - (know ^ (j % 2)); } else{ if((j - 1) % sz < sz / 2){ ans[i][j] = (i + 1) / 2 * 2 + 1; } else{ ans[i][j] = (i + 1) / 2 * 2 + 2; } } } } if(i % 2 == 0){ sz /= 2; } } // for(int i = 0; i < (int)ans.size(); ++i){ // for(int j = 0; j < (int)ans[i].size(); ++j){ // cout << ans[i][j] << ' '; // } // cout << endl; // } return ans; }
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