How many prime numbers（水题）

How many prime numbersCrawling in process...Crawling failedTime Limit:1000MS    Memory Limit:32768KB    64bit IO Format:%I64d & %I64u

SubmitStatusPracticeHDU 2138

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-bit signed integer, and each of them won’t be less than 2.

 

Output

  For each case, print the number of prime numbers you have found out.

 

Sample Input

 32 3 4 

 

Sample Output

 2 

 

求素数的个数，纯暴力解决

#include <stdio.h>#include <math.h>#include <string.h>#include <stdlib.h>int main(){int n,m,i;int flag=0;int count=0;while(~scanf("%d",&n)){        count=0;while(n--){scanf("%d",&m);flag=0;for(i=2;i<=sqrt(m);i++)if(m%i==0){    flag=1;    break;                }if(flag==0)                    count++;}printf("%d\n",count);}return 0;}