Greater Integers

input/code.cpp: In function 'void solve()':
input/code.cpp:30:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (j > n) {
                 ~~^~~

#pragma GCC optimize("O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
#include <bits/stdc++.h>
 
using namespace std;
 
using ll = long long;
using ld = long double;
 
const int mod = 1e9 + 7;
 
ll binpow(ll a, ll p) {
    ll res = 1;
    while (p) {
        if (p & 1) {
            (res *= a) %= mod;
        }
        p >>= 1;
        (a *= a) %= mod;
    }
    return res;
}
 
void solve() {
    ll n;
    cin >> n;
    uint64_t kek = 1;
    for (int i = 0; i <= 18; i++) {
        for (uint64_t j = kek; j <= 9 * kek; j += kek) {
            if (j > n) {
                cout << j << '\n';
                return;
            }
        }
        kek = kek * 10 + 1;
    }
}
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int T = 1;
    cin >> T;
    for (int tc = 1; tc <= T; tc++) {
        // cout << "Case #" << tc << ": ";
        solve();
    }
    return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED