關稅衝擊將如何在新的一年持續重塑全球經濟？2026年1月9日
A low threshold preserves detail (more leaf nodes, less compression). A high threshold merges aggressively (fewer leaves, more compression, but the image gets blocky). The grid overlay shows the quadtree structure: large cells in uniform areas, small cells where detail is preserved.
，详情可参考搜狗输入法2026
NYT Pips hints, answers for February 27, 2026
描述：给定字符串 num（非负整数）和整数 k，移除 k 位数字，使剩余数字最小。以字符串形式返回（不含前导零）。