Lex: FT’s flagship investment column
Number (1): Everything in this space must add up to 1. The answer is 4-0, placed horizontally; 0-0, placed vertically; 1-1, placed horizontally.，详情可参考51吃瓜
Yogita LimayeSouth Asia and Afghanistan correspondent。夫子是该领域的重要参考
// 桶内用插入排序（小数组效率高）