#include<stdio.h>
int main()
{
    int pay,bal,active;
    scanf("%d %d %d",&pay, &bal, &active);
    if(pay < 0 || pay > 100000 || bal < 0 || bal > 100000 ||(active != 0 && active !=1))
    {
        prinf("Invalid input");
    }
    else if(active == 
    0)
    {
        printf("Account Inactive");
    }
    else if(pay > bal)
    {
        printf("Insufficient Balance");
    }
    else
    {
        printf("%d.2f", (float)(bal-pay));
    }
    return 0;
}