Kyselyt

input/code.cpp: In function 'int main()':
input/code.cpp:12:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int j = 1;j <= a.length();j++)
                                          ^

#include <iostream>
#include <string>

int main() 
{
    int q,k;
    std::cin >> q;
    for (int i = 0; i < q; i++)
        {
            std::cin >> k;
            std::string a;
            for (int j = 1;j <= a.length();j++)
            {
                a += std::to_string(j);
            }
            std::cout << a.at(k-1) << "\n";
        }
}

Test 1

Group: 1

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::at

Test 2

Group: 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::at

Test 3

Group: 3

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::at