代码

void count_3d(int n, const unsigned *x, const unsigned *y, const unsigned *z, unsigned *out) {
	for (int j=0; j<n; ++j) for (int i=0; i<j; ++i) {
out[j] += (x[i]<x[j] & y[i]<y[j] & z[i]<z[j]);
out[i] += (x[i]>x[j] & y[i]>y[j] & z[i]>z[j]);
}
}

评测结果