#include <bits/stdc++.h> #define ll long long using namespace std; const int mod = 1e9 + 7; int fx[4] = {0,0,1,-1},fy[4] = {1,-1,0,0}; void solve(){ ll n,m; cin >> n >> m; vector<vector<int>>mp(n,vector<int>(m,0)); vector<vector<pair<int,int>>>lu...