#include<stdio.h>
    
    int main() {
        int paymentAmount, accountBalence, isActive;
        
        // Input reading
        if (scanf("%d %d %d", &paymentAmount, &accountBalance, &isActive)
            printf("Invalid input\n");
            return 0;
        }
        
        // Validate input ranges
        if (paymentAmound < 0 || paymenAmount > 1000000 ||
            accountBalance < 0 || accountBalance > 1000000 ||
            (isActive != 0 && isActive != 1)) {
             printf("Invalid input\n");
             return 0;
        }
        
        //Check if account is active
        if (isActive ==0){
            printf("Account Inactive\n");
            return 0;
        }
        
        // Check if statement is sufficient
        if (paymentAmount > accountBalance) {
            printf("Insufficient Balance\n");
            return 0;
        }
        
        // Process payment and print remaining balance
        float remainingBalance = accountBalance - paymentAccount;
        printf("%.2f\n",remainingBalance);
        
        return 0;
        }