摘要:
https://pintia.cn/problem-sets/994805342720868352/problems/994805454989803520 To prepare for PAT, the judge sometimes has to generate random passwords 阅读全文
摘要:
https://pintia.cn/problem-sets/994805342720868352/problems/994805422639136768 Behind the scenes in the computer's memory, color is always talked about 阅读全文
摘要:
https://pintia.cn/problem-sets/994805342720868352/problems/994805429018673152 Given two strings S~1~ and S~2~, S = S~1~ - S~2~ is defined to be the re 阅读全文