Submission #391510

#	Time	Username	Problem	Language	Result	Execution time	Memory
391510		Aldas25	Game (IOI14_game)	C++14	100 / 100	531 ms	25264 KiB

game

#include "game.h"
#include <bits/stdc++.h>

using namespace std;

#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define REP(n) FOR(O, 1, (n))
#define f first
#define s second
#define pb push_back
typedef vector<int> vi;
typedef long long ll;
typedef vector<ll> vl;
typedef pair<int, int> pii;
typedef vector<pii> vii;

const int MAXN = 1510;

int n;

int par[MAXN], sz[MAXN];
int cnt[MAXN][MAXN];
//vi nodes;
int find (int a) {return par[a] = par[a]==a ? a : find(par[a]);}
bool same (int a, int b) {return find(a) == find(b);}
void unite (int a, int b) {
    a = find(a), b = find(b);
    if (a == b) return;
    if (sz[b] > sz[a]) swap(a,b);
    par[b] = a;
    sz[a] += sz[b];

    FOR(i, 0, n-1) {
        if(same(i, a)) {
            cnt[i][a] = 0;
            cnt[i][b] = 0;
            cnt[a][i] = 0;
            cnt[b][i] = 0;
        } else {
            cnt[a][i] += cnt[b][i];
            cnt[i][a] += cnt[i][b];
            cnt[i][b] = 0;
            cnt[b][i] = 0;
        }
    }
}

void resetDsu () {
    FOR(i, 0, n-1) par[i] = i, sz[i] = 1;
    FOR(i, 0, n-1) FOR(j, 0, n-1) cnt[i][j] = 0;
    FOR(i, 0, n-1) {
        FOR(j, 0, n-1) if(i!=j) cnt[i][j]++;
       // nodes.clear();
       // nodes[i].pb(i);
    }
}

void initialize(int _n) {
    n = _n;
    resetDsu();
}

int hasEdge(int u, int v) {
    if (u > v) swap(u, v);

    if (same(u,v)) return 0;

    /*FOR(i, 0, n-1) {
        cout << " i = " << i << endl;
        FOR(j, 0, n-1) {
            cout << "   j = " << j << " cnt[i][j] = " << cnt[i][j] << endl;
        }
    }*/

    u = find(u), v = find(v);
    if (cnt[u][v] == 1) {
        unite(u,v);
        return 1;
    }
    cnt[u][v]--;
    cnt[v][u]--;
    return 0;
}

/*

4
0 1
3 0
1 2
0 2
3 1
2 3


4
0 3
2 0
0 1
1 2
1 3
2 3


4
0 3
1 0
0 2
3 1
1 2
2 3



*/

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