Tiered Discount

Source: Phước Hưng OJ

Version: Phuoc Hung OJ Extended

Problem Statement

A store applies exactly one discount tier based on original price $p$: below $100$ the discount is zero; from $100$ to below $500$ it is $10$; from $500$ onward it is $50$. Compute the amount payable. Discounts are not cumulative.

Input

One integer $p$ is the original price.

Output

Print one integer: the amount to pay.

Subtasks

• Subtask 1 (20 points): $0\le p<100$.
• Subtask 2 (30 points): $0\le p<500$.
• Subtask 3 (50 points): $0\le p\le10^6$.

Examples

Input

500

Output

450

Explanation

Price $500$ belongs to the last tier including its lower boundary. The single discount is $50$, so the payment is $500-50=450$.