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Cod sursa(job #32287)
#include <stdio.h>
#include <string.h>
#define maxx 128
#define ll long long
#define maxn 100010
int n;
ll sol;
int p[maxx][maxx][maxx];
int a[maxn],
b[maxn],c[maxn],d[maxx];
int count(int x)
{
int i,j,k,rez=0;
memset(p,0,sizeof(p));
for (i=1;i<=n;++i) p[a[i]%x][b[i]%x][c[i]%x]++;
for (i=0;i<x;++i)
for (j=0;j<x;++j)
for (k=0;k<x;++k)
if ((i==(x-i)%x) && (j==(x-j)%x) && (k==(x-k)%x)) rez+=p[i][j][k]*(p[i][j][k]-1);
else rez+=p[i][j][k]*p[(x-i)%x][(x-j)%x][(x-k)%x];
return rez/2;
}
int diviz(int x,int &rez)
{
int i,l=0,aux;
l=0;rez=0;
for (i=1;i*i<=x;++i)
if (x%i==0) d[++l]=i;
if (d[l]*d[l]==x) aux=l-1;
else aux=l;
for (i=aux;i>0;i--) d[++l]=x/d[i];
for (i=2;i<=l;++i)
if (x%d[i]==0)
{
rez++;
while (x%d[i]==0) x/=d[i];
}
return (1<<rez)==l;
}
int main()
{
freopen("puteri.in","r",stdin);
freopen("puteri.out","w",stdout);
int i,x,y;
scanf("%d ",&n);
for (i=1;i<=n;++i) scanf("%d %d %d ",&a[i],&b[i],&c[i]);
for (i=2;i<=maxx;++i)
if (diviz(i,y))
{
x=count(i);
// if (x>0) printf("%d %d\n",i,x);
if (y%2==1) sol+=x;
else sol-=x;
}
printf("%lld\n",sol);
return 0;
}