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- #include <iostream>
- #include <fstream>
- using namespace std;
- int cifra(int a)
- {
- int k;
- if(a==0)
- return a;
- while(a%2!=0)
- {
- a=a/10;
- }
- k=a%10;
- if(a==0)
- return -1;
- else
- return k;
- }
- int main()
- {
- int n, frecv[5], a;
- ifstream f("bac.in");
- f>>n;
- for(int i=0; i<=8; i+=2)
- frecv[i]=0;
- for(int i=0; i<n; i++)
- {
- f>>a;
- if(cifra(a)!=-1)
- frecv[cifra(a)]++;
- }
- for(int i=8; i>=0; i-=2){
- while(frecv[i]>0)
- {
- cout<<i;
- frecv[i]--;
- }
- }
- return 0;
- }
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