#include<stdio.h>
int main()
{
    int n,m,u,v,w;
    if(n<0)
    {
        printf("Invalid input");
    }
    else if(-10<=n<=10)
    {
        printf("%1s",&n);
    }
    else if(1<=m<=10)
    {
        printf("%d",&m");
    }
    else if(1<=u,v<=n)
    {
        printf("%d",&u,&v);
    }
    else(1<=w<=100)
    {
        printf("%d",&w);
    }
    return 0;
}