c3pk1

int d[2010][2010], u[2010][2010], l[2010][2010], r[2010][2010], dig[2010][2010];
int main() {  
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(12);
  
  int n, m; cin >> n >> m;
  vector<vector<int>> v(n, vector<int>(m));
  REP(i,n) {
    string s; cin >> s;

c3pk1

#include <bits/stdc++.h>
//#include <atcoder/all>
//using namespace atcoder;
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
using namespace std;
 
typedef vector<int> VI;
typedef vector<VI> VVI;

c3pk1

#include <bits/stdc++.h>

using namespace std;
#define all(x) x.begin(), x.end()
using ll = long long;

struct Rational {
  
  ll N, D; 
  ll GCD(ll x, ll y) {