func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:256000000 );   using namespace std;   const int MAX_ARRAY = 100005;   string num2str(int i) {     stringstream ss;     ss << i;     return ss.str();   }   std::vector<std::string> split(std::string str, std::string pattern) {     std::string::size_type pos;     std::vector<std::string> result;     str += pattern;     int size = str.size();     for (int i = 0; i < size; i++) {       pos = str.find(pattern, i);       if (pos < size) {         std::string s = str.substr(i, pos - i);         result.push_back(s);         i = pos + pattern.size() - 1;       }     }     return result;   }   bool DesCmp(int a, int b) { return a > b; }   int main() {     int n;     cin >> n;     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= n; j++) {         cout << (j - 1) * n + ((i + j - 1) % n) + 1 <<    ;       }       cout << endl;     }     return 0;   }   