#include<stdio.h>
int main()
{
    int a,b,c;
    if(scanf("%d %d %d",&a,&b,&c)  !=3)
    {
        printf("Invalid input");
        return 0;
    }
    if(a<=0 || a>=1000000 || b<0 || b>=1000000 || (c !=0 && c!=1
    {
    if(c==0)
    {
        printf("Account Inactive\n");
        return 0;
    }
    if(a>b)
    {
        printf("Insufficient Balance");
        return 0;
    }
     float remainingBalance = b-a;
     printf("%.2f\n",remainingBalance);
    return 0;