#include<stdio.h>
int main()
{
    int payment;
    int accbal;
    int isact;
    if(scanf("%d",&payment)!=1)
    {
        printf("Invalid input");
    }
    if(scanf("%d",&accbal)!=1);
    {
        printf("Invalid input");
    }
    if(scanf("%d",&isact)!=1);
    {
        printf("Invalid input");
        return 0;
    }
    float a=accbal-payment;
    if(payment>accbal);
    {
          printf("Insufficient Balance");
    }
    else if(isact==0){
         printf("Account Inacitve");
    }
    else{
        printf("%.2f",a);
    }
    return 0;
}