제출 #482632

#제출 시각아이디문제언어결과실행 시간메모리
482632thiago_bastos동굴 (IOI13_cave)C++17
100 / 100
309 ms532 KiB
#include "cave.h" const int MAXN = 5000; int S[MAXN], D[MAXN], marked[MAXN]; void exploreCave(int N) { for(int i = 0; i < N; ++i) { S[i] = 0; marked[i] = 1; } for(int i = 0; i < N; ++i) { if(tryCombination(S) != i) { for(int j = 0; j < N; ++j) S[j] ^= marked[j]; } int lo = 0, hi = N - 1; while(lo < hi) { int mid = (lo + hi) >> 1; for(int j = 0; j <= mid; ++j) S[j] ^= marked[j]; int ans = tryCombination(S); if(ans != i) hi = mid; else lo = mid + 1; for(int j = 0; j <= mid; ++j) S[j] ^= marked[j]; } D[hi] = i; S[hi] ^= 1; marked[hi] = 0; } answer(S, D); }
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