#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 (int i =1;i<3; i++){
            if (score[i] > max)
            max = score[i];
        }
        printf("%d",max);
    }
    printf("%d", max);
}
return 0;