C++ 杂项

STL排序
sort(s.begin(), s.end());
STL vector 初始化
vector<string> strs = {"dog","racecar","car"};
string 添加单个字符
sameAlpha[strI].append(1, strs[i][strI]); # 在末尾添加一个值为strs[i][strI]的字符