Greater Integers

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
//#include <queue>
//#include <stack>
//#include <cmath>
//#include <numeric>
//#include <cstring>
#include <cassert>
 
using namespace std;
 
#ifdef LOCAL_DEBUG
#include <local_debug.h>
#define DEBUG(...) DBG2::print(#__VA_ARGS__, __LINE__, __VA_ARGS__)
#else
#define DEBUG(...)
#endif
 
#define SZ(a) int((a).size())
#define REP(i,n) for(int i=0,_n=(n);i<_n;++i)
#define FOR(i,a,b) for(int i=(a),_b=(b);i<=_b;++i)
 
typedef long long llong;
typedef vector<int> VI;
typedef vector<VI> VVI;
 
 
 
int main(int argc, char* argv[]) {
   ios_base::sync_with_stdio(false); 
   cin.tie(nullptr);
 
   set<llong> S;
   FOR(len, 1, 19) {
      FOR(d, 1, 9) {
         string num(len, '0' + d);
         llong x = atoll(num.c_str());
         S.insert(x);
      }
   }
 
   int TC;
   cin >> TC;
   FOR(tc, 1, TC) {
      llong x;
      cin >> x;
      llong res = *S.upper_bound(x);
      cout << res << '\n';
   }
 
   return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED