#include<stdio.h>
int main()
{
    long paymentAmount,accountBalance;
    int isActive;
    if(scanf("%ld", &paymentAmount)!=1
    || scanf("%ld", &accountBalance)!=1
    || scanf("%d", &isActive)!=1)
{
    printf("Invalid input");
    return 0;
}    
    if(paymentAmount<0 || paymentAmount > 1000000 ||
    accountBalance <0  || accountBalance > 1000000 ||
    (isActive!= 0 && isActive!=1))
{
    printf("Invalid input");
    return 0;
}
    if(isActive==0)
{
    printf("Account Inactive");
    return 0;
}
    if(paymentAmount>accountBalance)
{
    printf("Insufficient Balancce");
    return 0;
}
    double Remaining=accountBalance-paymentAmount;
    printcf("%.2f",Remaining);
    return 0;
}