Stacked Bars With a Total Line on Top

Kestrel Freight bills each customer in two parts, a base fee and a surcharge. The billing chart puts the two parts on one bar per customer so the split is visible, and runs a line across the top showing how the money accumulates as you read left to right. The invoice footer needs the one number that line finishes at.

Task: Print the grand total across every customer and both parts.

Input

The first line holds one integer n, the number of customers. Each of the next n lines holds a customer name, that customer's base fee and that customer's surcharge, separated by single spaces. Names contain no spaces.

Output

One line holding the grand total as a plain number. Because the amounts are read as decimals, a whole total prints with one decimal place, for example 55.0.

Example:

Input:
3
A 10 5
B 20 10
C 5 5

Output:
55.0