1for (int c0 = 1; c0 <= n; c0 += 1) {
2  S1(c0, c0);
3  for (int c1 = c0; c1 <= n; c1 += 1)
4    S2(c0, c1);
5  S3(c0, n);
6}
7for (int c0 = n + 1; c0 <= m; c0 += 1)
8  S3(c0, n);
9