欣慰芝麻
22行代码AC_Prime Number Aizu - 0009（素数筛）(解题报告)
励志用更少的代码做更高效的表达题意：给一个数n，问1~n内有多少个素数题目：Write a program which reads an integer n and prints the number of prime numbers which are less than or equal to n. A prime number is a natural number which has exactly two distinct natural number divisors: 1 and
photoshop(ps)移动图层快捷键是什么
shift+上下左右方向键，每次平移10个像素，这里提醒大家在使用快捷键之前，首先要选中移动图标，否则直接按快捷键是没有效果的。
