Submission #432566

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Source Code Expand

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <sstream>
#include <utility>
#include <cstring>
#include <cmath>
#include <queue>
#include <set>
#include <map>
using namespace std;

#define rep(i,n) for(int i=0; i<n; i++)
typedef long long ll;
typedef pair<int,int> pii;

int main() {
	string s;
	int n;
	cin >> s >> n;
	vector<string> a;
	rep(i, s.length()) {
		rep(j, s.length()) {
			ostringstream oss;
			oss << s[i] << s[j];
			a.push_back( oss.str() );
		}
	}
	sort( a.begin(), a.end() );
	cout << a[n-1] << endl;
	return 0;
}

Submission Info

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