Submission #149520

#	Time	Username	Problem	Language	Result	Execution time	Memory
149520		mit한의대지망생 (#200)	Bulb Game (FXCUP4_bulb)	C++17	36 / 100	1004 ms	10512 KiB

bulb

#include "bulb.h"
#include <vector>

using namespace std;

vector<int> L, R;

int n;
bool vis[300001];
bool chB[300001];
bool res[300001];
bool inZ[300001];

void dfs(int x) {
    if (vis[x]) return;
    vis[x] = 1;
    if (L[x] < 0) {
        res[x] = L[x] == -2;
    }
    else {
        dfs(L[x]);
        res[x] = res[L[x]];
    }
    if (R[x] < 0) {
        chB[x] = R[x] == -2;
    }
    else {
        dfs(R[x]);
        chB[x] = res[R[x]];
    }
}

int FindWinner(int T, vector<int> _L, vector<int> _R) {
    n = _L.size();
    L = _L;
    R = _R;
    for (int x = 0; x < n; ++x) {
        swap(L[x], R[x]);
        int i;
        for (i = 0; i < n; ++i) {
            vis[i] = 0;
            inZ[i] = 0;
        }
        for (int i = 0; i >= 0; i = L[i]) inZ[i] = 1;
        dfs(0);
        for (i = 0; i < n; ++i) {
            if (inZ[i]) {
                if (chB[i]) break;
            }
            else {
                if (res[0]) break;
            }
        }
        if (i == n) return 1;
        swap(L[x], R[x]);
    }
    return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 25 / 25
• Subtask 3: 0 / 64