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