Temperature in a square plate, mixed conditions
12 5 0
2.0  2.0
2.0  4.0
3.0  3.0
4.0  2.0
4.0  4.0
1  0.0  0.0
4  6.0  0.0
7  6.0  6.0
10 0.0  6.0
13 0.0  0.0
1  2  300.0 0.0 0.0
4  3    0.0 0.0 0.0
7  2    0.0 0.0 0.0
10 3  300.0 0.0 0.0
13 2  300.0 0.0 0.0