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很疑惑，忘大牛帮忙解释下~~~3 2 1 1 2 5 1 3 10 2 3 20 对于这组数据，我的一个程序输出-1，一个输出10，但都能AC这个题。 输出-1是多加了一个约束条件。 输出10的程序则只用输入的约束条件。 Followed by:
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