Submission #3928438

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Source Code Expand

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <math.h>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <iomanip>
#include <map>
#include <utility>
#include <numeric>
#include <typeinfo>

using namespace std;

#define MOD 1000000007

int main(){
  string s;
  cin >> s;
  int K;
  cin >> K;

  vector<string> x;
  for(int i=1;i<=K;i++){
    for(int j=0;j<=s.size()-i;j++){
      string a;
      for(int k=j;k<i+j;k++){
        a+=s.at(k);
      }
      x.push_back(a);
    }
  }
  sort(x.begin(),x.end());
  x.erase(unique(x.begin(),x.end()),x.end());
  cout << x.at(K-1) << endl;

  return 0;
}

Submission Info

Judge Result