题目链接 题意：求出1-n的和，但是要去掉是2的整次幂的数 解法：直接模拟即可 #include<bits/stdc++.h>using namespace std;#define LL long long#define pb push_back#define X first#define Y second#define cl(a,b) memset(a,b,sizeof(a))

Tricky English Grammar Course Certificate Course Intro 本文是学习 https://www.coursera.org/learn/tricky-english-grammar?specialization=intermediate-grammar 这门课的学习笔记 文章目录 Tricky English Grammar

Note：In the first sample case, Grisha needs five yellow and four blue crystals to create two yellow balls, one green ball, and one blue ball. To do that, Grisha needs to obtain two additional cryst