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Graph Theory - Minimum Spanning Tree

Pro.ID   Problem Title Difficulty   Notes
1102    Constructing Roads Difficulty: 1
1162    Eddy's picture Difficulty: 1
1198    Farm Irrigation Difficulty: 1
1232    畅通工程 Difficulty: 1
1233    还是畅通工程 Difficulty: 1
1301    Jungle Roads Difficulty: 1
1598    find the most comfortable road Difficulty: 3
1863    畅通工程 Difficulty: 1
1875    畅通工程再续 Difficulty: 2
1879    继续畅通工程 Difficulty: 2
2121    Ice_cream’s world II Difficulty: 3
2489    Minimal Ratio Tree Difficulty: 3
3367    Pseudoforest Difficulty: 2
3371    Connect the Cities Difficulty: 1
4009    Transfer water Difficulty: 1
4081    Qin Shi Huang's National Road System Difficulty: 3
4126    Genghis Khan the Conqueror Difficulty: 5

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