运行 ID: 46531

Main.cc: In function ‘int main()’:
Main.cc:5:10: error: ‘M’ was not declared in this scope
  cin>>n>>M>>x>>y;
          ^
Main.cc:9:3: error: ‘col’ was not declared in this scope
   col[a]++;
   ^~~
Main.cc:9:3: note: suggested alternative: ‘atol’
   col[a]++;
   ^~~
   atol
Main.cc:14:3: error: ‘row’ was not declared in this scope
   row[a]++;
   ^~~