lvv

#include <iostream>
#include <vector>
using namespace std;

int main() {
        size_t n,m;
        std::cin >> n >> m;

        vector<vector<int> >  M(m, vector<int>(n,-1));
        int T=0,B=m,L=0,R=n;  // top, bottom, left, right

lvv

" table of contents fold

" fold togle
nmap <F8>         :hi clear Folded<CR>:call Fold()<CR>

" next/pref fold
nmap     {                  kzkjz<CR>
nmap     }                  zjz<CR>

lvv

#include <sto/sto.h>
using namespace sto;

#include <vector>
#include <iostream>
using namespace std;

int main() {

        // no need for clumsy iota  (is covertable to any STL container)

lvv

#include <sto/sto.h>
using namespace sto;

#include <vector>
#include <iostream>
using namespace std;

int main() {

   // no need for clumsy iota  (is covertable to any STL container)

lvv

#include <utility>
#include <iostream>
using namespace std;

template <typename T>
struct counter {
        static int    created,   alive;
        counter()  {++created; ++alive; }
        ~counter() {           --alive; }
};

lvv

some test