Submission #414490

#	Time	Username	Problem	Language	Result	Execution time	Memory
414490		illyakr	Game (IOI14_game)	C++14	0 / 100	1 ms	332 KiB

game

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

using namespace std;
int pred[1510];
int rang[1510];
int step[1510];
int find(int v) {
    if (pred[v] == v)return v;
    return pred[v] = find(pred[v]);
}
void make(int v, int n) {
    pred[v] = v;
    rang[v] = 1;
    step[v] = n - 1;
    return;
}
void merge(int a, int b) {
    a = find(a);
    b = find(b);
    if (a == b)return;
    if (rang[a] < rang[b])
        swap(a, b);
    pred[b] = a;
    step[a] += step[b];
    if (rang[a] == rang[b])
        rang[a]++;
}

int was[1510][1510];
void initialize(int n) {
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            was[i][j] = -1;
        }
    }
    for (int i = 1; i <= n; i++)
        make(i, n);
}

int hasEdge(int u, int v) {
    u++; v++;
    if (was[u][v] != -1) return was[u][v];

    if (find(u) == find(v)) {
        was[u][v] = 0; was[v][u] = 0;
        step[find(u)] -= 2;
        return 0;
    }
    if (step[find(u)] == 1 || step[find(v)] == 1) {
        was[u][v] = 1; was[v][u] = 1;
        merge(u, v);
        step[find(u)] -= 2;
        return 1;
    }
    was[u][v] = 0; was[v][u] = 0;
    step[find(u)] -= 2;
    return 0;
}

/**
4
0 3
1 0
0 2
3 1
1 2
2 3

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

4
0 1
3 0
1 2
0 2
3 1
2 3
*/

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