Problem 1001 第一题数据竟然不能为0

kizz | 2015-05-09 20:52:17Author
T_T白改一发
doubility | 2015-05-09 20:54:10# 1
+1................不说清楚
quailty | 2015-05-09 20:55:59# 2
中文题面有说是正整数……
doubility | 2015-05-09 20:58:03# 3
说是整数
quailty | 2015-05-09 21:02:26# 4
QAQ