#include <stdio.h>
void rev(int n){
while(n>=1){
n=n/10;
}
}
int main(void) {
rev(68390);
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+Cgp2b2lkIHJldihpbnQgbil7Cgl3aGlsZShuPj0xKXsKCQlwcmludGYoIiVkIixuJTEwKTsKCQluPW4vMTA7Cgl9Cn0KCmludCBtYWluKHZvaWQpIHsKCXJldig2ODM5MCk7CglyZXR1cm4gMDsKfQo=