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Organize Your Train part II Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 8787 Accepted: 2490 Description RJ Freight, a Japanese railroad 阅读全文
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Surprising Strings Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7403 Accepted: 4735 Description The D-pairs of a string of letters are the ordered pairs of letters that... 阅读全文
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//当时比赛的时候没有想到可以用SPFA做,TLE! Problem Description Kelukin is a businessman. Every day, he travels around cities to do some business. On August 17th, in m 阅读全文
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You have two strings SS and TT in all capitals. Now an efficient program is required to maintain a operation and support a query. The operation C~i~ch 阅读全文