Submission #1092220

#	Time	Username	Problem	Language	Result	Execution time	Memory
1092220		codexistent	Game (IOI14_game)	C++14	42 / 100	1065 ms	57172 KiB

game

#include "game.h"
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i = a; i <= b; i++)
 
int p[1505];
set<pair<int, int>> adj[1505];
int edge[1505][1505];
 
int find(int x){
    return (p[x] == x) ? x : (p[x] = find(p[x]));
}
 
void onion(int a, int b){
    a = find(a), b = find(b);
    if(a == b) return;
 
    if(adj[a].size() < adj[b].size()) swap(a, b);
 
    for(auto i : adj[b]){
        adj[a].insert(i);
        int x = find(i.first), y = find(i.second);
        if(y == b) swap(x, y);
 
        edge[min(a, y)][max(a, y)]++;
        edge[min(b, y)][max(b, y)]--;
        // cout << " WE ONLY MERGED EDGE " << i.first << " TO " << i.second << ", ERASED FROM " << b << ", " << y << " AND ADDED TO " << a << ", " << y << endl;
    }
    adj[b].clear();
 
    p[a] = p[b] = a; 
}
 
void initialize(int n) {
    FOR(i, 0, n - 1) p[i] = i;
 
    FOR(i, 0, n - 1){
        FOR(j, i + 1, n - 1){
            adj[i].insert(make_pair(i, j));
            adj[j].insert(make_pair(i, j));
            edge[i][j] = 1;
        }
    }
}
 
int hasEdge(int u, int v) {
    pair<int, int> e = make_pair(min(u, v), max(u, v));

    u = find(u), v = find(v);
    adj[u].erase(e);
    adj[v].erase(e);
    edge[min(u, v)][max(u, v)]--;

    if(u == v) return 1;
    if(edge[min(u, v)][max(u, v)] == 0){
        onion(u, v);
        return 1;
    }
    return 0;
}

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