后面五个点全TLE

#include<bits/stdc++.h>
#define LL long long
#define F(x,y,z,o) for(int o=x;o<=y;o+=z)
const int N=1e8+5;
using namespace std;
bool f[N];
void read(LL &sum)
{
	sum=0;int p=1;char ch=getchar();
	for(;!isdigit(ch);ch=getchar()) if(ch=='-') p=-1;
	for(; isdigit(ch);ch=getchar()) sum=sum*10+ch-48;
	sum*=p;
}
void write(LL x)
{
 	if(x>9)
 	{
	 	write(x/10);
		x%=10;
	}
	putchar(x+'0');
}
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);cout.tie(0);
	LL ans=0;
	LL n;
	read(n);
	f[1]=1;
	F(2,n/i,1,i)
	{
		if(f[i]==0)
		{
			F(i*i,n,i,j)
			{
				f[j]=1;
			}
		}
	}
	F(1,n,1,i)
	{
		if(!f[i]) ans++;
	}
	write(ans);
	return 0;
}