18 days. since there exist some day that doesn't rain at all.www.ddhw.com Those days will have both nice mornings and afternoons. suppose 11 mornings are coresponding to 11 afternoons, we will get 1 raining day. 12 days in total suppose 10 mornings are coresponding to 10 afternoons, we will get 3 raining days. 13 days in total ... then from the patern, we will get 5 mornings are coresponding to 5 afternoons, and get 13 raining days[tuh, duh, mathes]. and that will result 18 days in total. www.ddhw.com
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哈哈哈哈 O(∩_∩)O哈哈~ 好久不来了，不小心看了一眼自己主页，发现自动关联了自己以往发过的帖，点进这个看了一眼，笑个半死。。。敢情我当初还发过这么搞笑的东西啊，我自己完全不记得了 
雷达卡
发表于 2004-11-6 07:19:23