#include <bits/stdc++.h>
using namespace std;
long long a,b,x,y,z,dem[5];
int main()
{
freopen("COUNTNUM.inp","r",stdin);
freopen("COUNTNUM.out","w",stdout);
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 Month ago. |
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