#include<stdio.h>
int main(){
    int paymentAmount,accountBalance,isActive;
    float a;
   scanf("%d",&paymentAmount);
   scanf("%d",&accountBalance);
   scanf("%d",&isActive);
   
   if(paymentAmount<=1||paymentAmount>1000000||accountBalance<=1||accountBalance>100000)
   {
       printf("Invalid input");
       
   }
   else if(accountBalance<paaymentAmount){
       printf("Insufficient input");
   }
   else if(isActive==0)
   {
       printf("Account Inactive");
   }
   else{
   a=accountBalance-paymentAmount;
       printf("%.2f",a);
   }
}