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