Submission #835250

#	Time	Username	Problem	Language	Result	Execution time	Memory
835250		Liudas	Game (IOI14_game)	C++17	100 / 100	284 ms	15824 KiB

game

#include <iostream>
#include <numeric>
#include <vector>
#include <set>
using namespace std;
vector<vector<int>> matrix;
vector<int> par;
void initialize(int N){
    par.resize(N);
    matrix.assign(N, vector<int>(N, 1));
    for(int i = 0; i < N; i ++){;
        matrix[i][i] = 0;
    }
    iota(par.begin(), par.end(), 0);
}
int get(int x){
    if(par[x] != x){
        return par[x] = get(par[x]);
    }
    return x;
}
void merge(int a, int b){
    par[a] = b; 
}
int hasEdge(int u, int v){
    u = get(u);
    v = get(v);
    matrix[u][v]--;
    matrix[v][u]--;
    if(matrix[u][v] == 0){
        merge(u, v);
        for(int i = 0; i < par.size(); i ++){
            matrix[i][v] += matrix[i][u];
            matrix[v][i] += matrix[u][i];
        }
        return 1;
    }
    return 0;
}

Compilation message (stderr)

game.cpp: In function 'int hasEdge(int, int)':
game.cpp:32:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         for(int i = 0; i < par.size(); i ++){
      |                        ~~^~~~~~~~~~~~

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