测试数据 #0: Accepted, time = 250 ms, mem = 3840 KiB, score = 10

测试数据 #1: Accepted, time = 453 ms, mem = 5016 KiB, score = 10

测试数据 #2: Accepted, time = 62 ms, mem = 1420 KiB, score = 10

测试数据 #3: Accepted, time = 296 ms, mem = 3072 KiB, score = 10

测试数据 #4: Accepted, time = 218 ms, mem = 2832 KiB, score = 10

测试数据 #5: Accepted, time = 453 ms, mem = 5044 KiB, score = 10

测试数据 #6: Accepted, time = 484 ms, mem = 5488 KiB, score = 10

测试数据 #7: Accepted, time = 359 ms, mem = 3556 KiB, score = 10

测试数据 #8: Accepted, time = 531 ms, mem = 4772 KiB, score = 10

测试数据 #9: Accepted, time = 93 ms, mem = 1656 KiB, score = 10

Accepted, time = 3199 ms, mem = 5488 KiB, score = 100

代码+简析：http://www.cnblogs.com/Onlynagesha/p/5355133.html