Submission #595220

#	Time	Username	Problem	Language	Result	Execution time	Memory
595220		birthdaycake	Game (IOI14_game)	C++17	0 / 100	25 ms	47208 KiB

game

#include "game.h"
#include<bits/stdc++.h>
#define endl '\n'
#define mod 1000000007
using namespace std;
 
vector<int>adj[2000001];
int dsu[2000001],rnk[2000001];
set<pair<int,int>>d;
int N;
int Find(int x){
    if(dsu[x] == x) return x;
    return dsu[x] = Find(dsu[x]);
}
 
void Unite(int a, int b){
    a = Find(a); b = Find(b);
    if(rnk[a] < rnk[b]) swap(a,b);
    if(rnk[a] == rnk[b]) rnk[a]++;
    dsu[b] = a;
    
}
void initialize(int n) {
    N = n;
    for(int i = 0; i < n; i++) dsu[i] = i;
    
}
 
int hasEdge(int u, int v) {
    int set_a = Find(u), set_b = Find(v);
    if(set_a == set_b) return 0;
    vector<int>x,y;
    for(int i = 0; i < N; i++){
        if(Find(i) == set_a) x.push_back(i);
        if(Find(i) == set_b) y.push_back(i);
    }
    for(int i = 0; i < x.size(); i++){
        for(int j = 0; j < y.size(); j++){
            if(!d.count({x[i],y[i]})) return 0;
        }
    }
    d.insert({u,v});
    d.insert({v,u});
    return 1;
}

Compilation message (stderr)

game.cpp: In function 'int hasEdge(int, int)':
game.cpp:37:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int i = 0; i < x.size(); i++){
      |                    ~~^~~~~~~~~~
game.cpp:38:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         for(int j = 0; j < y.size(); j++){
      |                        ~~^~~~~~~~~~

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