제출 #108766

#제출 시각아이디문제언어결과실행 시간메모리
108766polyfish동굴 (IOI13_cave)C++14
100 / 100
415 ms640 KiB
#include <bits/stdc++.h> #include "cave.h" const int MAX_N = 5002; int s[MAX_N], true_state[MAX_N], d[MAX_N]; void Find(int l, int r, int pos) { if (l==r) { d[l] = pos; s[l] ^= 1; true_state[l] = s[l]; return; } int mid = (l + r) / 2; for (int i=l; i<=mid; ++i) { if (true_state[i]==-1) s[i] ^= 1; } int tmp = tryCombination(s); for (int i=l; i<=mid; ++i) { if (true_state[i]==-1) s[i] ^= 1; } if (tmp!=pos) return Find(l, mid, pos); return Find(mid+1, r, pos); } void exploreCave(int N) { memset(true_state, -1, sizeof(true_state)); for (int i=0; i<N; ++i) { if (tryCombination(s)!=i) { for (int i=0; i<N; ++i) { if (true_state[i]==-1) s[i] ^= 1; } } Find(0, N-1, i); } answer(true_state, d); }
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