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B. Infinite Prefixes time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given strin 阅读全文
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c++中的string如何删掉最后一个字符 // 1. s = s.substr(0,s.size() - 1); // 2. s = s.erase(s.end() -1); // 3. s.pop_back(); 将string 转化为c的字符串 s.c_str(); char c[20]; s 阅读全文
摘要:
A. Display The Number time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You have a large el 阅读全文