#include<stdio.h>
int main()
{
    int paymentAmount;
    int accountBalance;
    int isActive;
    float a;
    scanf("%d",&paymentAmount);
    scanf("%d",&accountBalance);
    scanf("%d",&isActive);
    if(accountBalance<paymentAmount){
        printf("Insufficient Balance");
    }
    else if(accountBalance<=0){
        printf("Account Inactive");
    }
    else if(paymentAmount<='z'||accountBalance<='z'||isActive<='z'){
        printf("Invalid input");
    }
    else{
        a=accountBalance-paymentAmount;
        printf("%d",a);
    }
    return 0;
    
}