Codechef•Jul 13, 2025

How many unattempted problems

Hazrat Ali

Codechef

CodeChef recently revamped its  to make it easier for users to identify the next problems they should solve by introducing some new features:

  • Recent Contest Problems - contains only problems from the last 2 contests
  • Separate Un-Attempted, Attempted, and All tabs
  • Problem Difficulty Rating - the Recommended dropdown menu has various difficulty ranges so that you can attempt the problems most suited to your experience
  • Popular Topics and Tags

Our Chef is currently practicing on CodeChef and is a beginner. The count of ‘All Problems’ in the Beginner section is X. Our Chef has already ‘Attempted’ Y problems among them. How many problems are yet ‘Un-attempted’?

Input Format

  • The first and only line of input contains two space-separated integers X and Y — the count of 'All problems' in the Beginner's section and the count of Chef's 'Attempted' problems, respectively.

Output Format

Output a single integer in a single line — the number of problems that are yet 'Un-attempted'

Constraints

  • 1≤Y≤X≤1000

Subtasks

  • Subtask 1 (100 points):
    • Original constraints.

Sample 1:

Input 
10 4
Output
 
6

Sample 2:

Input 
10 10
Output
 
0

Sample 3:

Input 
1000 990
Output
 
10

Sample 4:

Input 
500 1

Output
 
499

Solution
x, y = map(int, input().split())
difficulty = x - y
print(difficulty)




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