#include <stdio.h>
double avg(int n,int m,int l){
return (double)(n+m+l)/3;
}
int main(void){
int a,b,c;
scanf("%d %d %d",&a
,&b
,&c
);
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+Cgpkb3VibGUgYXZnKGludCBuLGludCBtLGludCBsKXsKCXJldHVybiAoZG91YmxlKShuK20rbCkvMzsKfQoKaW50IG1haW4odm9pZCl7CglpbnQgYSxiLGM7CglzY2FuZigiJWQgJWQgJWQiLCZhLCZiLCZjKTsKCXByaW50ZigiJWYiLGF2ZyhhLGIsYykpOwoJCglyZXR1cm4gMDsKfQo=