#include
using namespace std;
long long n,a,b,ans=0;
int x[50001];
void sieve(int N) {
for(int i=0;i<=N;++i)x[i]=1;
x[0]=0;
x[1]=0;
for(int i=2;i*i<=N;++i)
if(x[i]==1) for(int j=i*i;j<=N;j+=i)x[j]=0;
}
a,b,x,y,z,dem[5];
int main()
{
freopen("BEAUNUM.freopen("COUNTNUM.inp","r",stdin);
freopen("BEAUNUM.freopen("COUNTNUM.out","w",stdout);
sieve(35000);
cin>>n;
for(int i=1;i<=(int)sqrt(sqrt(n));i++)ans+=x[i];
cout<
cin>>a>>b>>x>>y;
z=(x*y)/__gcd(x,y);
if(a%x==0) dem[1]=b/x-a/x+1;
else dem[1]=b/x-a/x;
if(a%y==0) dem[2]=b/y-a/y+1;
else dem[2]=b/y-a/y;
if(a%z==0) dem[3]=b/z-a/z+1;
else dem[3]=b/z-a/z;
cout<<(b-a+1)-(dem[1]+dem[2]-dem[3]);
}
Replies to COUNTNUM 
| Title |
Name |
Language |
UNIX |
When |
| CLOPRIME |
Lê Hải Đăng |
cpp |
1711011348 |
1 Year ago. |
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