Submission #2495123

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Source Code Expand

#include <algorithm>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <map>
#include <math.h>
#include <set>
#include <stdio.h>
#include <string>
#include <utility>
#include <vector>
using namespace std;
int main() {
  string s;
  cin >> s;
  int k;
  cin >> k;
  set<string> ss;
  for (int i = 0; i < s.size(); i++)
    for (int j = i + 1; j <= s.size(); j++) {
      ss.insert(s.substr(i, j - i));
    }
  auto it = ss.begin();
  for (int i = 0; i < k - 1; i++)
    it++;
  cout << *it << endl;
  return 0;
}

Submission Info

Judge Result