## Problem A. Alice and numbers ≡

 Author: М. Спорышев Time limit: 1 sec Input file: Standard input Memory limit: 512 Mb Output file: Standard output

### Statement

Young programmer Alice does not like integers number K.

Alice wants to know number of integers in range from 1 to N (inclusive) not divisible by K.

### Input format

Input contains two integer numbers N and K.

### Output format

Output a single integer — number of integers not divisible by K.

2 ≤ N ≤ 109

1 ≤ K ≤ 100

### Sample tests

No. Standard input Standard output
1
5 2
3
2
4 2
2

## Problem H. Hlelo? wrold ≡

 Input file: Standard input Time limit: 1 sec Output file: Standard output Memory limit: 512 Mb

### Statement

Young programmer Vasya writes a "hello world" program in a simple programming language. Program consists of a single line and should look like that:

print("Hello,World")

Vasya is very bad at typing. While trying to enter the line above, he pressed letter keys L times, special character keys C times (including quotes, comma and parentheses). Vasya also pressed backspace key B times, erasing a single character every time.

Your program must determine if it is possible in principle that Vasya achieved the exact text above.

### Input format

Input file contains integers L, C, B.

### Output format

Output file must contain a single line YES or NO.

### Constraints

0 ≤ L, C, B ≤ 100

L + C ≥ B

### Sample tests

No. Standard input Standard output
1
15 5 0
YES
2
2 7 6
NO

0.198s 0.019s 15