#include<bits/stdc++.h>
using namespace std;
const int a=1e6+5;
bool isprime[a+1];
void sieve()
{
bool isprime[a+1];
for(int i=0;i<=a;i++) isprime[i]=true;
isprime[0]=false;
isprime[1]=false;
for(int i=2;i*i<=a;i++)
{
if(isprime[i]=true)
{
for(int j=i*i;j<=a;j+=i)
isprime[i]=false;
}
}
}
std;
int main()
{
freopen("beaunum. freopen("cloprime.inp","r",stdin);
freopen("beaunum.freopen("cloprime.out","w",stdout);
bool check[1000000];
for (int i=2;i<=1000000;i++){
check[i]=true;
}
check[0]=false;
check[1]=false;
for (int i=2;i<=1000000;i++){
if (check[i]==true){
for (int j=2*i;j<=1000000;j+=i){
check[j]=false;
}
}
}
long long n,m,d=0;
cin>>n;
m=(int)pow(n,1/4.);
sieve();
for (int i=2;i<=m;i++)
if(isprime[i]=true) d++;
cout<<d;
n;cin>>n;
long long x;
for(int i=1;i<=n;i++){
cin>>x;
while(check[x]==false) x--;
cout<<x<<endl;
}
}
Replies to Cloprime 
Title |
Name |
Language |
UNIX |
When |
Cloprime |
Nguyễn Hữu Trần Bảo |
cpp |
1711012310 |
1 Year ago. |
countnum |
Nguyễn Hữu Trần Bảo |
cpp |
1711011934 |
1 Year ago. |
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}