Submission #16563738


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#include <algorithm>
#include <cmath>
#include <cstring>
#include <deque>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <regex>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

typedef long long ll;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
constexpr double PI = 3.141592653589793;
constexpr int INF = 1e9 + 10;
constexpr ll INFL = 1e18 + 10;

template <class T>
bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T>
bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}

using namespace std;
// cout << setprecision(20) << ans << "\n";

int main() {
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);

  string s;
  cin >> s;
  if (s.size() != 26) {
    vector<int> seen(26, 0);
    for (char c : s) {
      seen[c - 'a'] = 1;
    }
    for (int i = 0; i < 26; i++) {
      if (!seen[i]) {
        s.push_back('a' + i);
        cout << s << "\n";
        return 0;
      }
    }
  }

  set<char> g;
  while (s.size()) {
    char c = s.back();
    s.pop_back();
    auto it = g.upper_bound(c);
    if (it != g.end()) {
      s += *it;
      cout << s << '\n';
      return 0;
    }
    g.insert(c);
  }
  cout << -1 << "\n";

  return 0;
}

Submission Info

Submission Time
Task A - Diverse Word
User mmatthew_43
Language C++ (GCC 9.2.1)
Score 300
Code Size 1465 Byte
Status AC
Exec Time 7 ms
Memory 3628 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 4
AC × 23
Set Name Test Cases
Sample s1.txt, s2.txt, s3.txt, s4.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, s1.txt, s2.txt, s3.txt, s4.txt
Case Name Status Exec Time Memory
01.txt AC 7 ms 3468 KB
02.txt AC 2 ms 3480 KB
03.txt AC 2 ms 3536 KB
04.txt AC 2 ms 3584 KB
05.txt AC 1 ms 3548 KB
06.txt AC 2 ms 3584 KB
07.txt AC 3 ms 3432 KB
08.txt AC 2 ms 3492 KB
09.txt AC 2 ms 3492 KB
10.txt AC 1 ms 3600 KB
11.txt AC 2 ms 3544 KB
12.txt AC 2 ms 3596 KB
13.txt AC 2 ms 3596 KB
14.txt AC 2 ms 3492 KB
15.txt AC 2 ms 3476 KB
16.txt AC 2 ms 3596 KB
17.txt AC 1 ms 3548 KB
18.txt AC 1 ms 3532 KB
19.txt AC 2 ms 3588 KB
s1.txt AC 3 ms 3628 KB
s2.txt AC 2 ms 3544 KB
s3.txt AC 1 ms 3544 KB
s4.txt AC 2 ms 3596 KB