Submission #1200674

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<string>
#include<algorithm>
#include<vector>
#include<queue>
#include<functional>
#include<map>
#include<cstring>
#include<unordered_map>
#include<set>
#include<string.h>
using namespace std;

signed main() {
	int a, b; cin >> a >> b;
	priority_queue<string>Q;
	for (int c = 0; c < a; c++) {
		string d; cin >> d;
		Q.push(d);
	}
	while (Q.size()) {
		cout << Q.top(); Q.pop();
	}
	puts("");
}

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