**Problem A: Copying Homework**

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sample input | sample output**Problem B: Cleaning Robots**

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sample input | sample output**Problem C: Even Path**

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sample input | sample output**Problem D: Find String in a Grid**

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sample input | sample output**Problem E: Songwriter**

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sample input | sample output**Problem F: Regular Forestation**

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sample input | sample output**Problem G: Performance Review**

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sample input | sample output**Problem H: Twin Buildings**

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sample input | sample output**Problem I: Mission Possible**

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sample input | sample output**Problem J: Tiling Terrace**

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sample input | sample output**Problem K: Addition Robot**

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sample input | sample output**Problem L: Road Construction**

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