#include <iostream>
using namespace std;
int main()
{
///problema 1 b
int n,m,r,r1=0;
cin>>n;
while (n>99)
{
if(n%2==0)
{
r=n/100; ///DE CE SA PIERZI ULTIMELE 2 CIFRE?
m=r%100; ///CRED CA AI REZOLVAT EXACT PT NUMERE DE 6 CIFRE
cout<<m;
}
else
{
r1= n%10*10+r1;
cout<<r1;
}
n=n/10;
}
}
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