LP1337 [JSOI2004]平衡点 [模拟退火]
UVa10537 The Toll! Revisited [Djikstra/字典序]
UVa1416 Warfare And Logistics [Dijkstra堆优化/卡常/最短路树]
UVa1504 Genghis Khan the Conqueror [MST/并查集]
LP3920 [WC2014]紫荆花之恋 [替罪羊树/点分治]
Scapegoat Tree 替罪羊树