Cod sursa(job #110439)
#include <fstream.h>
#include <string.h>
long a[30],n;
void citire(){
ifstream fin("ordine.in");
char c;
fin>>c;
while (!fin.eof()){
a[c-'a']++;
fin>>c;
n++;}
fin.close();
}
void afisare(){
ofstream fout("ordini.out");
while (n){
for (int i=0;i<30;i++)
if (a[i]!=0) {
fout<<char(i+'a');
a[i]--;
for (int j=i+1;j<30;j++)
if (a[j]!=0){
fout<<char(j+'a');
a[j]--;}
n-=2;
break;
}
if (n==1)
for (int i=0;i<30;i++)
if (a[i]!=0){
fout<<char (i+'a');
n--;
break;}
}
fout<<"\n";
fout.close();
}
int main(){
citire();
afisare();
return 0;
}