# kruskal #
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Save your cat
题目 Nicholas Y. Alford was a cat lover. He had a garden in a village and kept many cats in his garden. The cats were so...
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Out of Hay
题目 The cows have run out of hay, a horrible event that must be remedied immediately. Bessie intends to visit the other...
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Bad Cowtractors
题目 Bessie has been hired to build a cheap internet network among Farmer John's N (2 <= N <= 1,000) barns that are...
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Conscription
题目 Windy has a country, and he wants to build an army to protect his country. He has picked up N girls and M boys and w...