class Solution { public:     vector<vector<int> > rotateMatrix(vector<vector<int> > mat, int n) {         // write code here         vector<vector<int>> result(n,vector<int>(n));         f...

#include <iostream> #include <vector> #include <string> using namespace std; int main() {     int n;     string str;     cin>>n;     cin>>str;          int pos=1;     if(n<=4)     {...

#include <iostream> #include <string> #include <unordered_map> using namespace  std; unordered_map<int,string> dict={     {1,"壹"},     {2,"贰"},     {3,"叁"},     {4,"肆"},     {5,"伍"},     {6,"陆"},     ...

// #include <iostream> #include <string> #include <algorithm> #include <unordered_map> #include <vector> using namespace std; int cal(int a,int b,char c) {     switch(c)     {         case '+':return a+b;       &nb...