#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    if(scanf(%d %d %d, &paymentAmount,&accountBalance,&isActive)!=3)
      printf("Inavlid input\n");
      return 0;
}
if(isActive == 0)
{
      printf("Account Inactive\n");
}
else if(paymentAmount>accountBalance)
{
    printf("Insufficient Balance\n");
}
else 
{
    float remaining = (float)(accountBalance - paymentAmount);
    printf("%.2f\n",remaining);
    
}
return 0;
}