C - Prime number or not Time Limit:2000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Submit Status Practice FZU 1649 Description Your task is simple.Give you a number N, you should judge whether N is a prime number or not. Input There…
Problem Description Give you a lot of positive integers, just to find out how many prime numbers there are. Input There are a lot of cases. In each case, there is an integer N representing the number of integers to find. Each integer won't exceed 32-…
How many prime numbers Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 12955 Accepted Submission(s): 4490 Problem Description Give you a lot of positive integers, just to find out how many…
米勒罗宾素数测试: /* if n < 1,373,653, it is enough to test a = 2 and 3. if n < 9,080,191, it is enough to test a = 31 and 73. if n < 4,759,123,141, it is enough to test a = 2, 7, and 61. if n < 2,152,302,898,747, it is enough to test a = 2, 3, 5, 7,…
1552: Friends Time Limit: 3 Sec Memory Limit: 256 MBSubmit: 723 Solved: 198[Submit][Status][Web Board] Description On an alien planet, every extraterrestrial is born with a number. If the sum of two numbers is a prime number, then two extraterrestr…
Problem Description Give you a lot of positive integers, just to find out how many prime numbers there are. Input There are a lot of cases. In each case, there is an integer N representing the number of integers to find. Each integer won’t exce…
385C - Bear and Prime Numbers 思路:记录数组中1-1e7中每个数出现的次数,然后用素数筛看哪些能被素数整除,并加到记录该素数的数组中,然后1-1e7求一遍前缀和. 代码: #include<bits/stdc++.h> using namespace std; #define ll long long #define pb push_back #define mem(a,b) memset((a),(b),sizeof(a)) const int INF=0x3f…
Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive integer have? For example, the integer 53 has two representations 5 + 7 + 11 + 13 + 17 and 53…
