/* Running Rabbits Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 590 Accepted Submission(s): 417 Problem Description Rabbit Tom and rabbit Jerry are running in a field. The field is an N×N grid.
题意:给定一个n个点的树,每个结点上有一种颜色c[i] 定义一条简单路径的偷税指数为simga (sigma w[i](i=0..a[j]))*v[j](j=0..m),其中a[i]为第i种颜色在路径上出现的次数 现在共有q个非强制在线的操作,格式为(op,x,y) op=0时代表将x号点的颜色修改为y op=1时询问(x,y)这条简单路径的偷税指数 思路: #include<bits/stdc++.h> using namespace std; typedef long long ll; t
STM32 TIM1高级定时器RCR重复计数器的理解 TIMx_RCR重复计数器寄存器,重复计数器只支持高级定时器TIM1和TIM8,下面看标准外设库的TIM结构体的封装: typedef struct { uint16_t TIM_Prescaler; /*!< Specifies the prescaler value used to divide the TIM clock. This parameter can be a number between 0x0000 and 0xFFFF