# include<stdio.h>
int main(){
    int a,b,c;
    scanf("%d %d %d",&a,&b,&c);
    if(a==b && b==c){
        printf("Invalid Input");
    }
    else{
        if(a>=b&&a>=c){
            printf("%d",a);
        }
        else if(b>=a&&b>=c){
            printf("%d",b);
        }
        else{
            printf("%d",c)
        }
    }
}