+-------+ | 4 522| | 4 | |3 5 | | 4 4 3 | |3 31 | +-------+ Solution: (5,0) (5,4)(6,4) (0,0)(0,1)(0,2) (4,0)(4,1)(5,1) (1,1)(1,2)(1,3)(1,4) (2,2)(2,3)(2,4)(3,4)(4,4) (3,1)(3,2)(3,3)(4,3) +-------+ | XXXXXX| | XXXX | |XXXX | |XX XXX | |X XX | +-------+