Educational Codeforces Round 111 (Rated for Div. 2) C. Manhattan Subarrays(思维/暴力/好题)
Suppose you have two points 𝑝=(𝑥𝑝,𝑦𝑝)p=(xp,yp) and 𝑞=(𝑥𝑞,𝑦𝑞)q=(xq,yq). Let's denote the Ma ...
Suppose you have two points 𝑝=(𝑥𝑝,𝑦𝑝)p=(xp,yp) and 𝑞=(𝑥𝑞,𝑦𝑞)q=(xq,yq). Let's denote the Ma ...
A. Era 维护一个新数组的末尾位置变量pos,遍历的时候不断更新即可。 B. XOR Specia-LIS-t 注意到长度为1的序列也满足单调递增的条件(虽然比较特殊),所以如果n为偶数 ...