Submission #1139431

#	Time	Username	Problem	Language	Result	Execution time	Memory
1139431		mychecksedad	Game (IOI14_game)	C++17	42 / 100	1096 ms	6620 KiB

game

#include "game.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
#define ff first
#define ss second
#define pii pair<int,int>
#define vi vector<int>
const int N = 1500+100, M = 1e5+10, K = 52, MX = 30;

struct Dsu {
    vector<int> s, p;
    int sz;
    Dsu(int n){
        sz = n;
        s.resize(n, 1);
        p.resize(n);
        for(int i = 0; i < n; ++i) p[i] = i;
    }
    int find(int v){
        if(p[v] == v) return v;
        return (p[v] = find(p[v]));
    }
    void merge(int a, int b){
        a = find(a);
        b = find(b);
        if(a != b){
            if(s[a] > s[b]){
                swap(a, b);
            }
            s[b] += s[a];
            p[a] = b;
            sz--;
        }
    }
};

vector<int> c;
int nn = 0;
set<pii> S;
void initialize(int n) {
    c.clear();
    c.resize(n, n-1);
    nn =n;
    S.clear();
    for(int j = 0; j < n; ++j) for(int i = j + 1; i < n; ++i) S.insert({j, i});
}
int check(int u, int v){
    Dsu d(nn);
    for(auto [x, y]: S){
        if(x == u && y == v) continue;
        d.merge(x, y);
    }
    return d.sz == 1;
}
int hasEdge(int u, int v) {
    if(u > v) swap(u, v);
    if(check(u, v) == 0){
        return 1;
    }
    S.erase(pii{u, v});
    return 0;
}

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