Babaza Game

input/code.cpp: In function 'std::vector<std::__cxx11::basic_string<char> > change(std::string, std::string, int)':
input/code.cpp:16:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         for (int i = 0; i < aux.size(); ++i){
      |                         ~~^~~~~~~~~~~~
input/code.cpp:19:55: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |                 if (i > 0 && aux[i-1] != desired && i < aux.size()-1 && aux[i+1] != desired)
      |                                                     ~~^~~~~~~~~~~~~~
input/code.cpp: In function 'int main()':
input/code.cpp:38:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'}...

using namespace std;
#include <iostream>
#include <string>
#include <queue>
#include <vector>
#include <algorithm>
#include <set>
 
vector<string> change(string a, string b, int n){
    
    string aux = a;
    vector<string> res;
    res.push_back(a);
    while (res.back() != b){
        for (int i = 0; i < aux.size(); ++i){
            if (i % 2 == n % 2){
                char desired = b[i];
                if (i > 0 && aux[i-1] != desired && i < aux.size()-1 && aux[i+1] != desired)
                    aux[i] = desired;
            }
        }
        res.push_back(aux);
        ++n;
    }
    return res;
}
 
int main() {
    string a, b;
 
    cin >> a >> b;
 
    vector<string> v1 =  change(a, b, 0);
    vector<string> v2 = change(a, b, 1);
 
    if (v1.size() < v2.size()){
        for (int i = 0; i< v1.size(); ++i)
            cout << v1[i] << endl;
    }
    else{
        for (int i = 0; i< v2.size(); ++i)
            cout << v2[i] << endl;
    }
 
 
}

Test 1

Verdict: RUNTIME ERROR

Test 2

Verdict: RUNTIME ERROR

Test 3

Verdict: RUNTIME ERROR

Test 4

Verdict: RUNTIME ERROR

Test 5

Verdict: RUNTIME ERROR

Test 6

Verdict: RUNTIME ERROR

Test 7

Verdict: RUNTIME ERROR

Test 8

Verdict: RUNTIME ERROR

Test 9

Verdict: RUNTIME ERROR

Test 10

Verdict: RUNTIME ERROR

Test 11

Verdict: RUNTIME ERROR

Test 12

Verdict: RUNTIME ERROR

Test 13

Verdict: RUNTIME ERROR

Test 14

Verdict: RUNTIME ERROR