Submission #2495133

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Source Code Expand

#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3f
#define EPS (1e-10)
#define MOD 1000000007
using namespace std;
typedef long long ll;
typedef pair<int,int>P;

signed main(){
	string s;int k;cin>>s>>k;
	vector<string>v;
	rep(i,s.size()){
		for(int j=1;j<=10;j++){
			v.push_back(s.substr(i,j));
		}
	}
	sort(v.begin(),v.end());
	v.erase(unique(v.begin(),v.end()),v.end());
	k--;
	cout<<v[k]<<endl;
}

Submission Info

Judge Result