Terrible security

input/code.cpp: In function 'int main()':
input/code.cpp:60:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |             for(int i=0; i< suport.size(); i++){
      |                          ~^~~~~~~~~~~~~~~

#include <iostream>
#include <vector>
#include <stack>
 
using namespace std;
 
 
int main(){
    int n,q;
    cin >> n>>q;
 
    vector<int> obre(n);
 
    for(int i=0; i<n; i++){
        int temp;
        cin >> temp;
        obre[temp-1] = i;
 
    }
 
    vector<int> querry(q);
 
    for(int i=0; i<q; i++){
        int ttemp;
        cin >> ttemp;
        querry[i] = ttemp-1;
    }
 
    vector<int> solucions(n, -1);
 
    for(int i=0; i<q; i++){
        if(solucions[querry[i]]!=-1){
            cout << solucions[querry[i]];
            if(i!=q-1)cout << " ";
            continue;
        }


        vector<bool> open(n,false);
        int key = querry[i];
        int count = 0;
        stack<int> podem;
        podem.push(key);
        vector<pair<int,int>> suport;
        bool a = true;
        while(!podem.empty()){
            int act = podem.top(); podem.pop();
            open[act] = true;
            count +=1;
            if(!open[obre[act]]){
                podem.push(obre[act]);
                suport.push_back(make_pair(obre[act], -count));
            }
            else{
                a = false;
            }
        }
        solucions[key] = count;
        if(a==false){ 
            for(int i=0; i< suport.size(); i++){
                solucions[suport[i].first] = count;
            }
        }

        cout << count;
        if(i!=q-1)cout << " ";
 
    }
    cout << endl;
 
}

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

Test 36

Verdict: ACCEPTED

Test 37

Verdict: ACCEPTED

Test 38

Verdict: ACCEPTED

Test 39

Verdict: ACCEPTED

Test 40

Verdict: ACCEPTED

Test 41

Verdict: ACCEPTED

Test 42

Verdict: ACCEPTED

Test 43

Verdict: ACCEPTED

Test 44

Verdict: ACCEPTED

Test 45

Verdict: ACCEPTED

Test 46

Verdict: ACCEPTED

Test 47

Verdict: ACCEPTED

Test 48

Verdict: ACCEPTED

Test 49

Verdict: ACCEPTED

Test 50

Verdict: ACCEPTED

Test 51

Verdict: ACCEPTED

Test 52

Verdict: ACCEPTED

Test 53

Verdict: ACCEPTED

Test 54

Verdict: ACCEPTED

Test 55

Verdict: ACCEPTED

Test 56

Verdict: ACCEPTED

Test 57

Verdict: ACCEPTED

Test 58

Verdict: ACCEPTED

Test 59

Verdict: ACCEPTED

Test 60

Verdict: ACCEPTED

Test 61

Verdict: ACCEPTED

Test 62

Verdict: ACCEPTED

Test 63

Verdict: ACCEPTED

Test 64

Verdict: ACCEPTED

Test 65

Verdict: ACCEPTED

Test 66

Verdict: ACCEPTED

Test 67

Verdict: ACCEPTED

Test 68

Verdict: ACCEPTED

Test 69

Verdict: ACCEPTED

Test 70

Verdict: ACCEPTED

Test 71

Verdict: ACCEPTED

Test 72

Verdict: ACCEPTED

Test 73

Verdict: ACCEPTED

Test 74

Verdict: ACCEPTED