Submission #366765

#	Time	Username	Problem	Language	Result	Execution time	Memory
366765		KoD	Game (IOI14_game)	C++17	42 / 100	108 ms	620 KiB

game

#include <bits/stdc++.h>

int size;
bool remain[80][80];

void initialize(int n) {
    assert(n <= 80);
    size = n;
    for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
            remain[i][j] = (i != j);
        }
    }    
}

struct DSU {
    std::vector<int> par;
    DSU(const int n): par(n, -1) { }
    int find(const int u) {
        return par[u] < 0 ? u : par[u] = find(par[u]);
    }
    bool merge(int u, int v) {
        u = find(u);
        v = find(v);
        if (u == v) {
            return false;
        }
        if (par[u] > par[v]) {
            std::swap(u, v);
        }
        par[u] += par[v];
        par[v] = u;
        return true;
    }
};

bool isConnected() {
    int cnt = 0;
    DSU dsu(size);
    for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
            if (remain[i][j]) {
                if (dsu.merge(i, j)) {
                    cnt += 1;
                }
            }
        }
    }
    return cnt == (size - 1);
}

int hasEdge(int u, int v) {
    remain[u][v] = remain[v][u] = false;
    if (isConnected()) {
        return 0;
    }
    else {
        remain[u][v] = true;
        return 1;
    }
}

#ifdef __APPLE__
int main() {
    int n;
    std::cin >> n;
    initialize(n);
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < i; ++j) {
            int u, v;
            std::cin >> u >> v;
            std::cout << hasEdge(u, v) << '\n';
        }
    }
}
#endif

• Subtask 1: 15 / 15
• Subtask 2: 27 / 27
• Subtask 3: 0 / 58