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. - the result is trivial, save success list ...
Java solutions to easy problems on leetcode (better than 90% of solutions at least in terms of both performance and memory consumption) ...
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