// editor2
#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    float x;
    scanf("%d",&paymentAmount);
    scanf("\n%d",&accountBalance);
    scanf("%d",&isActive);

    if(accountBalance<paymentAmount)
    {
        printf("\nInsufficient Balance");
    }
    else if(isActive==0)
    {
        printf("\nAccount Inactive");
    }
    else if(paymentAmount >=0 || paymentAmount <= 1000000 && accountBalance>= 0 || accountBalance <= 1000000 && isActive==1) 
    {
        x=accountBalance-paymentAmount;
        printf("\n%d",x);
    }
    else
    {
        printf("Invalid input.");
    }
    
    
    return 0;
}