X和數獨 X-Sums Sudoku

規則：在空格中填入1∼9，使得每一行、列、宮中的數字都沒有重複外；標示數在該行列在本方向的第一個數字若為X，則標示數為該行列前X個數字的數字和。
rule : Classical rules of sudoku, Each number outside the grid is the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction.
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解答 result：
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