#include <bits/stdc++.h> using namespace std; bool compare(int a,int b){ return a > b; } int main(){ int r[4010],i,n,k = 0,x; cin>>n; for(i = 0;i < n;i++){ cin>>x; while(x != 0){ r[k] = x % 10; x = x / 10; k++; } } sort(r,r+k,compare); for(i = 0;i < k;i++){ cout<<r[i]; } } /************************************************************** Problem: 1458 User: wangyiyang Language: C++ Result: Accepted Time:17 ms Memory:2076 kb ****************************************************************/