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【Codeforces】[615A]Bulbs

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【Codeforces】[611A]New Year and Days

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【Codeforces】[610A]Pasha and Stick

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【Codeforces】[612A]The Text Splitting

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【Codeforces】[604A]Uncowed Forces

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【Codeforces】[599A]Patrick and Shopping

知识汇总

欧几里得——GCD引发的讨论

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【郑轻】[1125]上三角矩阵的判断

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【郑轻】[1127]矩阵乘积

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【杭电】[1997]汉诺塔VII

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【杭电】[5053]the Sum of Cube

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【杭电】[2504]又见GCD

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【杭电】[1722]Cake

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【杭电】[1222]Wolf and Rabbit

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【NYOJ】[1769]对决