运行 ID: 8678

Main.cc: In function ‘int main()’:
Main.cc:5:10: error: expected unqualified-id before numeric constant
    5 |  int n,m,2flag=0;
      |          ^~~~~
Main.cc:12:5: error: ‘flag’ was not declared in this scope
   12 |     flag = 1;
      |     ^~~~
Main.cc:16:5: error: ‘flag’ was not declared in this scope
   16 |  if(flag) {
      |     ^~~~