给一串数字candidates (can have duplicates), 和一个target. 找到所有unique的 组合(combination) int[], 要求每个combination的和 = target. 注意: 同一个candidate integer, 只可以用一次. - Time: every level has 1 less element to ...
find all unique combinations in C where the candidate numbers sums to T. Each number in C may only be used once in the combination. Note All numbers (including target) will be positive integers.
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