Submission #2561082

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define INF 9223372036854775807
#define int long long
#define pi 3.14159265

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    string s;
    cin >> s;
    int k;
    cin >> k;
    vector<string> ans(0);
    for(int i = 0; i  < s.size(); i++){
        for(int j = 0; j < k; j++){
            if(j + i + 1 > s.size()) continue;
            ans.push_back(s.substr(i,j+1));
        }
    }
    sort(ans.begin(), ans.end());
    unique(ans.begin(), ans.end());
    cout << ans[k-1] << endl;
}

Submission Info

Judge Result