#include<stdio.h>
int main()
{
    int score[3];
    for(int i=0;i < 3;i++){
        scanf("%d",&score[i]);
    }
    if(score[0] == score[] && 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);
    }
    return 0;
}