Result: Accepted
Time: 54ms
Memory: 1748kB
#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<queue>
#include<list>
#include<math.h>
#include<vector>
#include<stack>
#include<string>
#include<set>
#include<map>
#include<numeric>
#include<stdio.h>
#include<functional>
#include<time.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
const int maxn = 1e5 + 10;
const ull mode = 10092272478850909;
const int inf = 0x3f3f3f3f;
const double pi = 3.14159265358979323846264338327950;
template <class T> inline T min(T a, T b, T c) { return min(min(a, b), c); }
template <class T> inline T max(T a, T b, T c) { return max(max(a, b), c); }
template <class T> inline T min(T a, T b, T c, T d) { return min(min(a, b), min(c, d)); }
template <class T> inline T max(T a, T b, T c, T d) { return max(max(a, b), max(c, d)); }
ll ans[1111];
int isPrime(int x)
{
int i,mmm=1;
double limit;
if(x<=1)
mmm=0;
else if(x==2)
mmm=1;
else if(x%2==0)
mmm=0;
else
{
double t=x;
limit=sqrt(t)+1;
for(i=3;i<limit;i+=2)
{
if(x%i==0)
{
mmm=0;
break;
}
}
}
return mmm;
}
int main()
{
int t;
scanf("%d",&t);
for(int i=2;i<1111;i++)
if(isPrime(i))
ans[i]=ans[i-1]+1;
else
ans[i]=ans[i-1];
for(int p=0;p<t;p++)
{
int n;
scanf("%d",&n);
printf("%d\n",ans[n]);
}
return 0;
}