problema1

#include <iostream>
#include <cstring>
#include <stdlib.h>
using namespace std;
char v[100][20];
int n;
char *f(int li,int ls)
{
int lm;
char *x, *y;
if(li==ls) return v[li];
else if(li-ls==1) {if(strlen(v[li])<strlen(v[ls])) return v[li];
                                            else return v[ls];}
else
{lm=(li+ls)/2;
strcpy(x,f(li,lm));
strcpy(y,f(lm+1,ls));
if(strlen(x)<strlen(y)) return x;
else return y;

}
}
main()
{
int i;
cin>>n;
for(i=1;i<=n;i++) {
    cin.get();
cin.get(v[i],20);}
cout<<f(1,n);

}