35       PetscInt    cols[2];  in main()  local
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()
45       PetscInt    cols[2];  in main()  local
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()
55       PetscInt    cols[3];  in main()  local
58       cols[0] = r - 1;  in main()
59       cols[1] = r;  in main()
60       cols[2] = r + 1;  in main()
62       vals[0] = use_edge_weights ? (cols[0] == 0 ? 2.0 : 5.0) : 1.0;  in main()
64       vals[2] = use_edge_weights ? (cols[2] == N - 1 ? 3.0 : 5.0) : 1.0;  in main()
66       PetscCall(MatSetValues(A, 1, &r, 3, cols, vals, INSERT_VALUES));  in main()