Greater Integers

input/code.cpp: In function 'int main()':
input/code.cpp:21:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j = 1; j<skaicius.length(); j++) {
                            ~^~~~~~~~~~~~~~~~~~

#include <bits/stdc++.h>
#include <string>
#include <sstream>
using namespace std;

int main(){

    int t, n;
    cin >> t;
    int atsakymai [n];

    for(int i = 0; i<t; i++) {
        cin >> n;
        while (true) {
            n++;
            string skaicius;
            stringstream ss;
            ss << n;
            ss >> skaicius;
            bool arTinka = true;
            for(int j = 1; j<skaicius.length(); j++) {
                if (skaicius[j] != skaicius[j-1]) arTinka = false;
            }
            if (arTinka) {
                atsakymai[i] = n;
                break;
            }
        }
    }
    //cout << endl;
    for(int i=0; i<t; i++) {
        cout << atsakymai[i] << endl;
    }
    //cout << "Programos pabaiga" << endl;


}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: TIME LIMIT EXCEEDED