Greetings Codeforces! We are the Programming and Algorithms Group (PAG) from IIT Roorkee dedicated to fostering a vibrant competitive programming community. This is the official BLOG for our Open Contest Series (OCS), a contest series meticulously crafted to equip you for internship and placement challenges while celebrating the art of coding.

This blog will be periodically updated with the schedule of upcoming contests.

Join the official Codeforces group for OCS to participate in the contests: OCS Codeforces Group

Past Contests:

Contest-1 (Basics) Topics: Binary Search, Two Pointers, Bitmasks, Prefix Sum, etc. -- 3PM IST, 13th April 2025

Contest-2: Number Theory -- 3PM IST, 20th April 2025

Upcoming Contests:

Contest-3: Greedy -- 3PM IST, 28th May 2025
Contest-4: Dynamic Programming -- 3PM IST, 1st June 2025
Contest-5: Combinatorics and Probability -- 3PM IST, 4th June 2025
Contest-6: Graphs and Trees -- 3PM IST, 8th June 2025
Contest-7: Implementation -- 3PM IST, 11th June 2025
Contest-8: Mixed-1 -- 3PM IST, 15th June 2025
Contest-9: Strings -- 3PM IST, 18th June 2025
Contest-10: Constructive Algorithms -- 3PM IST, 22nd June 2025
Contest-11: Geometry -- 3PM IST, 25th June 2025
Contest-12: Games -- 3PM IST, 29th June 2025
Contest-13: Segment Trees -- 3PM IST, 2nd July 2025