Repeat Evolution

921. Minimum Add to Make Parentheses Valid

2 attempts over 727 days. This page compares how the solution size, thinking trace, and stuck markers changed between posts.

2 attempts

727 days apart

-4 line delta

2 best lines

0 thought lines

0 stuck attempts

Repeat lab Latest post Back to library LeetCode

Timeline Shape

Bars are normalized inside this problem, so the widest bar is the largest attempt in that metric.

Each card is a daily post, with local deltas from the previous attempt.

Attempt 1 · 09.10.2024

medium

Solution 6 lines

Thoughts 0 lines

tiny kotlin

Minimum inserts to balance brackets

Full post LeetCode

Attempt 2 · 06.10.2026

medium

Solution 2 lines

Thoughts 0 lines

one-liner kotlin

727 days later lines -4 chars -34 thoughts 0

Min insertions to balance braces

Full post LeetCode

Compact generated readout from the first and latest attempts.

Solution size compressed

-4 lines, -34 chars.

Thinking trace steady

0 lines between first and latest attempt.

Best snapshot 06.10.2026

2 lines, 107 chars.

Honesty markers 0 stuck

0 stuck attempts, 1 one-liner attempts.