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Cod sursa(job #25601)
#include <stdio.h>
#define nm 100001
int a[nm], b[nm], c[nm];
int n, sol, i, j, A, B, C;
int cmmdc(int a, int b)
{
int c;
while (b != 0)
{
c = a % b;
a = b;
b = c;
}
return a;
}
int main()
{
freopen("puteri.in", "r", stdin);
freopen("puteri.out","w",stdout);
scanf("%d ", &n);
for (i=1; i<=n; i++)
scanf("%d %d %d", &a[i], &b[i], &c[i]);
sol = 0;
for (i=1; i<=n; i++)
for (j=1; j<=n; j++)
{
A = a[i] + a[j];
B = b[i] + b[j];
C = c[i] + c[j];
if (cmmdc(A, B) > 1 || cmmdc(B, C) > 1 || cmmdc(A, C) > 1)
sol ++;
}
printf("%d\n", sol);
fclose(stdin);
fclose(stdout);
}