Brexit

input/code.cpp: In function 'int main()':
input/code.cpp:25:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(le[f] >= (v[f].size()+1)/2){
                                ^

#include <bits/stdc++.h>

using namespace std;
int n, m, x, l;
vector<int> v[202020];
int le[202020];
bool d[202020];
int main(){
	cin >> n >> m >> x >> l;
	for(int i = 0; i < m; ++i){
		int a, b; cin >> a >> b;
		v[a].push_back(b);
		v[b].push_back(a);
	}
	queue<int> q;
	q.push(l);
	while(!q.empty()){
		int cur = q.front();
		q.pop();
		if(d[cur])
			continue;
		d[cur] = 1;
		for(auto f: v[cur]){
			le[f]++;
			if(le[f] >= (v[f].size()+1)/2){
				q.push(f);
			}
		}
	}
	if(d[x])
		cout << "leave\n";
	else
		cout << "stay\n";
	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED

Test 31

Verdict: ACCEPTED

Test 32

Verdict: ACCEPTED

Test 33

Verdict: ACCEPTED

Test 34

Verdict: ACCEPTED

Test 35

Verdict: ACCEPTED