#include <stdio.h>
int main(){
  float a,b;
  int c;
 if  (scanf("%d",&a )!=1|| scanf("%d",&b)!=1||scanf("%d",&c)!=1){
      printf("Invalid input");
      return 0;
  }
  if(c==0){
      printf("Account Inactive");
      return 0;
  }
  if(a>b){
      printf("Insufficient Balance");
      return 0;
  }
  float remaining=b-a;
  printf("%.2f",remaining);
  return 0;
  
}