#include<stdio.h>
int main()
{
    int a,b,s;
    if(scanf("%d%d%d",&a,&b,&s)!=3 || a<0||
    a>100000||b<0||b>100000||(s!=0&&s!=1))
    {
        printf("Invalid input");
        return 0;
    }
    if(s==0)
    printf("Account Inactive");
    else if(a>b)
    printf("Insufficient Balance");
    else
    printf("%/2d",(double)(b-a));
}