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Cod sursa(job #41152)
using namespace std;
#include<fstream>
#define nmax 1002
#define lmax 35
#define cst 30
int s[nmax][lmax],a[nmax],b[nmax],c[nmax],aux[lmax];
int main()
{
ifstream fin("regiuni.in");
ofstream fout("regiuni.out");
int m,n,i,j,x,y,k;
fin>>n>>m;
for(i=1;i<=n;i++)
fin>>a[i]>>b[i]>>c[i];
for(i=1;i<=m;i++)
{
fin>>x>>y;
for(j=1;j<=n;j++)
if(a[j]*x+b[j]*y+c[j]>0)
s[i][j/cst]|=(1<<(j%cst));
}
//sortare
for(i=1;i<=m;i++)
{
j=i;
while(j/2 && memcmp(s[j],s[j/2],sizeof s[j]) > 0)
{
memcpy(aux,s[j],sizeof aux);
memcpy(s[j],s[j/2],sizeof s[j]);
memcpy(s[j/2],aux,sizeof aux);
j/=2;
}
}
i=m;
while(i>1)
{
memcpy(aux,s[1],sizeof aux);
memcpy(s[1],s[i],sizeof s[1]);
memcpy(s[i],aux,sizeof aux);
i--;
j=1;
while(1)
{
k=2*j;
if(k>i) break;
if(k+1<=i && memcmp(s[k+1],s[k],sizeof s[k])>0) k++;
if(memcmp(s[j],s[k],sizeof s[k]) >= 0) break;
memcpy(aux,s[j],sizeof aux);
memcpy(s[j],s[k],sizeof s[j]);
memcpy(s[k],aux,sizeof aux);
j=k;
}
}
int sol=1;
for(i=2;i<=m;i++)
if(memcmp(s[i],s[i-1],sizeof s[i]))
sol++;
fout<<sol<<"\n";
fin.close();
fout.close();
return 0;
}