【HDU】
[強連通]:
1269  迷宮城堡 判斷是否是一個強連通★
2767Proving Equivalences  至少加幾條邊讓整個圖變成強連通★
3836 Equivalent Sets  至少加幾條邊讓整個圖變成強連通★
1827    Summer Holiday  傳遞的最小費用★★
3072    Intelligence System  傳遞的最小費用★★
3861The King’s Problem 強連通+二分匹配★★
3639Hawk-and-Chicken  強連通縮點 + 樹形dp（累加子節點的總權值）★★
3594 Cactus 仙人掌圖★★★

[雙連通]:
2242考研路茫茫——空調教室  雙聯通縮點+樹形DP
2460Network 邊雙連通
3849By Recognizing These Guys, We Find Social Networks Useful  雙連通求橋
3896Greatest TC  雙連通
4005 The war  邊雙連通
3394Railway 雙連通求塊

[LCA]:
2586How far away ？
2874Connections between cities
3078Network  LCA+排序
3830Checkers  二分+LCA
4338 Simple Path [點連通縮塊+LCA]

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【POJ】
[強連通]:
1236Network of Schools
2553 The Bottom of a Graph  好題！ 找出度為0的集合
2186    Popular Cows  好題！ 找出度為0的，其他分量都指向它的集合
2375Cow Ski Area 強連通
2762    Going from u to v or from v to u?  縮點+拓撲排序
3160   Father Christmas flymouse  強連通+最短路
3180 The Cow Prom  判斷有幾個環， 分量中元素大於1的個數
3114Countries in War  強連通+最短路
3592Instantaneous Transference  強連通分量+最長路
1904King's Quest  強連通+並查集


[雙連通]：
3694 Network  邊雙連通 (同hdu2460)
3177 Redundant Paths   構造邊雙連通
3352 Road Construction   構造邊雙連通
2942 Knights of the Round Table  (點雙連通經典題)
1515 Street Directions  (無向圖改有向圖)
1438 One-way Traffic   (混合圖改有向圖)


[LCA]:
1330Nearest Common Ancestors
1470Closest Common Ancestors
1986Distance Queries
3417Network
3728The merchant  LCA+RMQ(倍增法)
2763Housewife Wind  LCA+線段樹(樹鏈剖分)
1523SPF
1144Network
2117Electricity
3237Tree


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【其他OJ】
zoj 2682 People like People
foj 1719 Spy Network
http://www.spoj.pl/problems/QTREE2/  LCA查詢路徑第k個點
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