Sequence Generator with Filtering and Transformation

Rust Medium iterators

Task «Sequence Generator with Filtering and Transformation»

Write a Rust program that reads an integer N, then N pairs of numbers (a_i, b_i) separated by spaces. Using iterators, form a sequence of numbers a_i for which b_i > 0. Then transform each resulting number by multiplying it by 2 and adding 10. Print the sum of all transformed numbers. If no number passes the filter, print 0.

Input Format

The first line contains an integer N (1 ≤ N ≤ 1000). Then N lines, each contains two integers a_i and b_i (-1000 ≤ a_i, b_i ≤ 1000).

Output Format

One integer — the sum of the converted numbers.

Examples

Example 1

INPUT

6 0
1 2 3 1 2 3

OUTPUT

3

Example 2

INPUT

1
0 0

OUTPUT

0

main.rs