Submission #62999316

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Source Code Expand

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

//#define filename "xxx" 
#define FileOperations() freopen(filename".in", "r", stdin), freopen(filename".out", "w", stdout)
//#define multi_cases 1

#define inf 0x3f3f3f3f
#define Linf 0x3f3f3f3f3f3f3f3f
#define pii pair<int, int> 
#define all(v) v.begin(), v.end()
template<class T> bool vmax(T &a, T b) { return b > a ? a = b, true : false; }
template<class T> bool vmin(T &a, T b) { return b < a ? a = b, true : false; }
template<class T> void clear(T &x) { T().swap(x); }

const int N = 52;

int n;
string s[N];

void Traveller() {
	cin >> n;
	for(int i = 1; i <= n; ++i) cin >> s[i];
	sort(s+1, s+n+1, [] (string &a, string &b) { return a.size() < b.size(); });
	for(int i = 1; i <= n; ++i) cout << s[i];
}

signed main() {
#ifdef filename
	FileOperations();
#endif
	
	signed _ = 1;
#ifdef multi_cases
	scanf("%d", &_);
#endif
	while(_--) Traveller();
	return 0;
}

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Judge Result