제출 #204723

#제출 시각아이디문제언어결과실행 시간메모리
204723bogdan_ogorodniy동굴 (IOI13_cave)C++14
0 / 100
592 ms528 KiB
#include <bits/stdc++.h> #include "cave.h" using namespace std; const int inf = 1e9 + 7; int N; int _S[5001], _P[5001]; // void answer(int a[], int b[]) { // for (int i = 0; i < N; i++) cout << a[i] << ' '; cout << '\t'; for (int i = 0; i < N; i++) cout << _S[i] << ' '; cout << '\n'; // for (int i = 0; i < N; i++) cout << b[i] << ' '; cout << '\t'; for (int i = 0; i < N; i++) cout << _P[i] << ' '; cout << '\n'; // } // int tryCombination(int a[]) { // int ans = 0; // vector <int> op(N + 1, 0); // for (int i = 0; i < N; i++) { // if (_S[i] == a[i]) op[_P[i]] = true; // } // while (op[ans++]); // return ans; // } int temp[5001]; int s[5001], p[5001]; bool fnd[5001]; void sett(int pos, int f) { memset(temp, 0, sizeof temp); for (int i = 0; i < pos; i++) { if (!fnd[i]) { temp[i] = f; } else { temp[i] = s[i]; } } for (int i = pos; i < N; i++) { if (!fnd[i]) { temp[i] = !f; } else { temp[i] = s[i]; } } } void exploreCave(int n) { n--; N = n; for (int i = 0; i < n; i++) { // find the switch connected with i-th door // find the switch position 1/0 sett(n, 1); int k = tryCombination(temp); // in (fnd) -- already used swithces bool f = 0; if (k >= i + 1) { f = true; } else { f = false; } int l = 0, r = n - 1; while (r - l > 1) { int m = (l + r) / 2; sett(m + 1, f); int k = tryCombination(temp); if (k >= i + 1) { r = m; } else { l = m; } } sett(l + 1, f); k = tryCombination(temp); if (k >= i + 1) { p[l] = i + 1; s[l] = f; fnd[l] = true; } else { p[r] = i + 1; s[r] = f; fnd[r] = true; } } answer(s, p); } // signed main() { // N = 10; // for (int i = 0; i < N; i++) { // _P[i] = i; // } // random_shuffle(_P, _P + N); // for (int i = 0; i < N; i++) { // srand(time(nullptr)); // _S[i] = 1; // } // exploreCave(N); // return 0; // }
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