// editor2
#include<stdio.h>
int main(){
    int p,b,a;
    if(scanf("%d %d %d",&p,&b,&a)
    printf("Invalid input");
    else if(!a)
    printf("Account Inactive");
    else if(p>b)
    printf("Insufficient Balance");
    else
    printf("%.2f",(float)(b-p));
    return 0;
}