poj 1251Jungle Roads (最小生成树:prime+krusual)
poj 2677 Tour (最短路)
poj 2485Highways (求最长路)
一位ACMer过来人的心得
poj 2395 Out of Hay (最小生成树的最大边)
poj 1703 Find them, Catch them (并查集)
poj 1308 Is It A Tree? (最小生成树)
poj1258 AgriNet (最小生成树prime)
poj1789 Truck History (最小生成树)