10-programare crescator

#include<iostream>
#include<fstream>

using namespace std;


int main(){
ifstream f1("atestat.in");
ofstream f2("atestat.out");
int n,x,y,z=0,i=0,j=0,v[50],schimb=0,a,b;
f1>>n;
while(f1>>x){
    y=x;
    while(y!=0){
        z=z*10+y%10;
        y=y/10;
    }
    if(x==z){
        b=0;
        f2<<x<<" ";
        while(z!=0){
           b++;
           z=z/10;
        }
        if(b%2!=0){
            i++;
            v[i]=x;
        }

    }
    z=0;
}
f2<<endl;
for(a=1;a<=i-1;a++){
    for(j=a+1;j<=i;j++)
        if(v[a]>v[j]){
            schimb=v[a];
            v[a]=v[j];
            v[j]=schimb;
        }
}
for(a=1;a<=i;a++)
    f2<<v[a]<<" ";
f2.close();
f1.close();
}