考虑每一种相邻的数的情况对答案的贡献
#pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #pragma GCC target("avx,avx2,fma")
xj
本题属于以下题库，请选择所需题库进行购买
Scan the QR code below with WeChat to sign in
First-time scan will create your account automatically
请使用微信扫描下方二维码完成注册
