一个小孩的自我踌躇

http://acm.sdut.edu.cn/onlinejudge2/index.php/Home/Index/problemdetail/pid/2072.html删数问题 Time Limit: 1000MS Memory Limit: 65536KB Submit Statistic Discuss Problem Description键盘输入一个高精度的正整数n（≤100位），去

Skip the ClassTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1028 Accepted Submission(s): 599Problem Description Finally term begins. lura

Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 9539 Accepted Submission(s): 4034Problem Description 看病要排队这个是地球人都知道的常识。 不过经过细心的0068的观察，他发现

裸题O（nlogn）：#include <cstdio>#include <iostream>#include <algorithm>using namespace std;typedef long long ll;const int maxn=3000000+100;int phi[maxn];void init() { for(int i=2;i<maxn;i++) phi[