#include <stdio.h>
int main(){
    int x,y,z;
    scanf("%d %d %d",&x,&y,&z);
    int c;
    if(x%2==0){
        c=x;
    }
    else if(y%2==0){
        c=y;
    }
    else{
        c=z;
    }
    printf("%d",c);
    return 0;

}