Drumroll, please!
Colored diff view showing how files changed over time (unified, full-context, and raw modes)，这一点在搜狗输入法2026中也有详细论述
// 题目保证nums1的元素都在nums2中，无需额外判空，更多细节参见搜狗输入法下载
A simpler API would mean fewer concepts, fewer interactions between concepts, and fewer edge cases to get right resulting in more confidence that implementations actually behave consistently.