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【杭电】[1863]畅通工程

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【杭电】[1102]Constructing Roads

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【CodeForces】[597A]Divisibility

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【CodeForces】[624A]Save Luke

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【CodeForces】[300A]Array

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【CodeForces】[638A]Home Numbers

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【CodeForces】[366A]Dima and Guards

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【杭电】[2087]剪花布条

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【CodeForces】[651C]Watchmen

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【CodeForces】[675B]Restoring Painting

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【CodeForces】[667A]Pouring Rain

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【CodeForces】[669A]Little Artem and Presents

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【CodeForces】[675A]Infinite Sequence

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【CodeForces】[673A]Bear and Game

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【CodeForces】[651B]Beautiful Paintings