#include<stdio.h>
int main()
{
    int v,s,t;
    if(scanf("%d%d%d",&v,&s,&t)1=3)
    printf("Invalid input");
    else if(!t)
    printf("Account Inactive");
    else if(v>s)
    printf("Insufficient Balance");
    else
    printf("%.2f",(float)(s-v));
    return 0;
}