输入：head = [2,1,5]
Swelling fanbase has been in dreamland this past month as Zimbabwe have defied all expectations in the competition
。关于这个话题，safew官方版本下载提供了深入分析
第九十二条 公安机关办理治安案件，有权向有关单位和个人收集、调取证据。有关单位和个人应当如实提供证据。
输入：nums1 = [4,1,2], nums2 = [1,3,4,2]