微信上线新功能：同一文件多聊转发不重复占存储
for (int i = 0; i < n - 1; i++) {
，这一点在heLLoword翻译官方下载中也有详细论述
For urgent, non-life-threatening issues, the advice is to use the NHS 111 website or to call the helpline. GP surgeries will be open as normal.
示例：nums = [2,1,2,4,3] → res = [4,2,4,-1,-1]。