时间限制: 2s
内存限制: 192MB 提交: 13696 解决: 6797
输入格式
一个整数N(-109 <= N <= 109)
输出格式
如果N > 0, 输出positive；
如果N = 0, 输出zero；
如果N < 0, 输出negative。
提示
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