nka_kun的博客

TufuramaOne day Polycarp decided to rewatch his absolute favourite episode of well-known TV series "Tufurama". He was pretty surprised when he got results only for season 7 episode 3 with his search q...

题目描述 一个只含数字的字符串，q次操作，每次操作将第i位数字改为x，每次操作后，统计长度在[l, r]之间且首数字大于尾数字的子串的个数。输入描述:第一行一个只含数字的字符串； 第二行3个整数q, l, r； 接下来q行，每行两个整数i, x。输出描述:输出q行，每行一个整数，表示长度在[l, r]之间且首数字大于尾数字的子串的个数。示例1输入585605 2 2 4 1 6 4 2输出7 8备...

1391 : Countrie 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 There are two antagonistic countries, country A and country B. They are in a war, and keep launching missiles towards each other. It is know...

There are two sequences a1, a2, · · · , an, b1, b2, · · · , bn. Let S(t) =∑⌊(t−bi)ai⌋. . There are m operations within three kinds as following: • 1 x y: change value ax to y. • 2 x y: change value bx...