Bitmask onhttps://h30306.github.io/blog/zh-tw/tags/bitmask/Recent content in Bitmask onHugo -- gohugo.iozh-twhwork0511@gmail.com (Wei Yi Chung)hwork0511@gmail.com (Wei Yi Chung)© 2026 Wei Yi ChungWed, 09 Sep 2026 00:00:00 +0000LeetCode 996: Number of Squareful Arrayshttps://h30306.github.io/blog/zh-tw/leetcode/leetcode-996/Wed, 09 Sep 2026 00:00:00 +0000hwork0511@gmail.com (Wei Yi Chung)https://h30306.github.io/blog/zh-tw/leetcode/leetcode-996/LeetCode 996 解題筆記：n 最多 12，用 bitmask DP：dp[mask][last] = 用了 mask 這些數、最後一個是 last 的排列數；相同的數規定依 index 順序使用來去重LeetCode 2376: Count Special Integershttps://h30306.github.io/blog/zh-tw/leetcode/leetcode-2376/Sat, 05 Sep 2026 00:00:00 +0000hwork0511@gmail.com (Wei Yi Chung)https://h30306.github.io/blog/zh-tw/leetcode/leetcode-2376/LeetCode 2376 解題筆記：數位 DP，狀態 (pos, tight, started, mask)；mask 記錄用過的數字，前導零不能算成用過 0