摘要:
first, i use exhausitive search. however, it will exceed the time limit. the time speed is O(n^2) then, i change the strategy. for impove the speed, I 阅读全文
摘要:
a collocation is two or more words that often go together. These combination just sound "right" to native english speaker. 'commit a crime' is a typic 阅读全文
摘要:
my solution: wrong answer : because 2147483647*2 is -2 (int) , only 33bit can represent 2147483647--2147483647 signed 0-4294967295 unsigned then i cha 阅读全文