#include<stdio.h>
int main()
{
    double pa,acb;
    int isactv;
    if(scanf("%lf %lf %d",&pa,&acb,&isactv)!=3)
    {
        printf("Invalid input");
        return 0;
    }
    if(pa<0||pa>1000000||acb<0||acb>1000000||(actv=0 &&  isactv!=1))
    {
        printf("Invalid input");
        return 0;
    }
    if(actv==0)
    {
        printf("Account Inactive");
        return 0;
    }
    if(acb<pa)
    {
        printf("Insufficient Balance");
        return 0;
    }
    double remaingbalance=acb-pa;
    printf("%.2f",remaingbalance);
    return 0;
}