选择题简单编程题3道,37.5,100,401.计算非回文字符串假定给出一个字符串A,其子串是A删除一个或连续多个字符后的新字符串B,比如字符串"i" "iq" "qoonex" "nex" "iex"等都是字符串"IQOONEX"的子串,但是"iqon" "oo" "iqnx" "iqq" "ooo" "nn" "iqee"等就不是&q...