#include<stdio.h>
int main()
{
    int amt, bal, active;
    if(scanf("%d %d %d",&amt,&bal,&active)!=3 || amt < 0 || amt > 1000000 || bal < 0 || bal > 1000000 ||(active != 0 && active !=1))
        printf("Invalid input");
    else if (!active)
        printf("Account Inactive");
    else if(amt > bal)
        printf("Insufficient Balance");
    else
        printf("%.2f",(float)bal-amt));
    return 0;
}