问题 1139 输出最短字符串

Solved: 992 Solved
Challenged: 27716 Submits
答案正确: 992
格式错误: 31
答案错误: 445
时间超限: 9
输出超限: 3
运行时错误: 51
编译失败: 6249
测试运行: 19931

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