10   PetscInt        r, N = 10, start, end, *vweights;  in main()  local
31     for (r = start; r < end; ++r) vweights[r - start] = rank + 1;  in main()
33   for (r = start; r < end; ++r) {  in main()
34     if (r == 0) {  in main()
38       cols[0] = r;  in main()
39       cols[1] = r + 1;  in main()
43       PetscCall(MatSetValues(A, 1, &r, 2, cols, vals, INSERT_VALUES));  in main()
44     } else if (r == N - 1) {  in main()
48       cols[0] = r - 1;  in main()
49       cols[1] = r;  in main()
53       PetscCall(MatSetValues(A, 1, &r, 2, cols, vals, INSERT_VALUES));  in main()
58       cols[0] = r - 1;  in main()
59       cols[1] = r;  in main()
60       cols[2] = r + 1;  in main()
66       PetscCall(MatSetValues(A, 1, &r, 3, cols, vals, INSERT_VALUES));  in main()