Tour Plan

Chef is going on a roadtrip, and is trying to figure out how much it will cost him. His cab operator gives him the following rates: - A fixed cost of $X$ rupees that will cover up to $50$ kilometers, and - Every kilometer past the $50$-th has a cost of $Y$ rupees per kilometer. Chef's destination is $Z$ kilometers away. How much will he need to pay? ### Input - The only line of input will conta