#include<stdio.h>
int main(){
    int score[3];
    for (int i=0;i<3;i++){
        scanf("%d",&score[i]);
    }
    if (score[0] == score[1]  && score[1] == score[2]) {
        printf("Invalid input");
    }
    else{
        int max = score[0];
        for (inti =1;i < 3;i++){
            if  (score[i] > max)
        }
        printf("%d",max);
    }
    return 0;
}