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