Algorithmic Problem Count Mismatch: 187 Problems vs. 188 Claimed in README and leaderboard

[weiwch]

The repository actually contains 187 algorithmic problems now, not 188 as claimed in the README badge and Agent leaderboard.

The problem IDs range from 0-315 with some gaps. Breaking down by count:

• Problems with ID < 200 (aligned with paper): 172
• Problems with ID 301-315: 15