oj.uz

Submission #959654

# Submission time Handle Problem Language Result Execution time Memory
959654 2024-04-08T16:05:18 Z vjudge1 Game (IOI14_game) C++17
0 / 100
 1 ms 348 KB 
#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math,inline")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,lzcnt,mmx,abm,avx,avx2,fma")
#include "game.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 1500;

int n, p[N], sz[N];
unordered_set<int> adj[N];
bitset<N> vis;

int findSet(int x) {
    return (p[x] == x ? x : p[x] = findSet(p[x]));
}

void unite(int x, int y) {
    x = findSet(x);
    y = findSet(y);

    if (sz[x] < sz[y]) swap(x, y);

    p[y] = x;
    sz[x] += sz[y];

    while (!adj[y].empty()) {
        adj[*adj[y].begin()].erase(y);
        adj[y].erase(adj[y].begin());
    }
}

void addEdge(int x, int y) {
    adj[x].insert(y);
    adj[y].insert(x);

    unite(x, y);
}

void removeEdge(int x, int y) {
    adj[x].erase(y);
    adj[y].erase(x);
}

int dfs(int x) {
    vis[x] = 1;

    int cnt = sz[x];
    for (int y : adj[x]) {
        if (vis[y]) continue;
        cnt += dfs(y);
    }
    return cnt;
}

void initialize(int NN) {
    n = NN;

    for (int i = 0; i < n; i++) {
        p[i] = i;
        sz[i] = 1;

        for (int j = i+1; j < n; j++) {
            adj[i].insert(j);
            adj[j].insert(i);
        }
    }
}

int hasEdge(int u, int v) {
    u = findSet(u);
    v = findSet(v);
    if (u == v) return 0;

    removeEdge(u, v);

    vis.reset();
    if (dfs(u) < n) {
        addEdge(u, v);
        return 1;
    }

    vis.reset();
    if (dfs(v) < n) {
        addEdge(u, v);
        return 1;
    }

    return 0;
}

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 58.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 344 KB Output isn't correct
3 Halted 0 ms 0 KB -