#include<stdio.h>
int main()
{
    int pay,bal,active;
    scanf("%d %d %d",&pay,&bal,&active);
    if(pay < 0 || pay > 100000 || bal < 0 || bal > 1000000 || (active != 0 && active != !)){
        printf("Invalid invalid");
    } else if (active == 0) {
        printf("Account Inactive");
    } else if (pay > bal) {
        printf("Insufficient Balance");
    } else {
        printf("%.2f",(float)(bal - pay));
    }
    return 0;
}