运行 ID: 134434

Main.cc: In function ‘int main()’:
Main.cc:23:11: error: ‘k2’ was not declared in this scope
  int k1 = k2 = 1 , k = 0
           ^~
Main.cc:23:11: note: suggested alternative: ‘k1’
  int k1 = k2 = 1 , k = 0
           ^~
           k1
Main.cc:24:20: error: ‘i’ was not declared in this scope
  for ( int i = 1 ; i < n ; i ++ )
                    ^
Main.cc:45:10: error: ‘ans’ was not declared in this scope
  cout << ans << endl ;
          ^~~
Main.cc:45:10: note: suggested alternative: ‘abs’
  cout << ans << endl ;
          ^~~
          abs
Main.cc:23:6: warning: unused variable ‘k1’ [-Wunused-variable]
  int k1 = k2 = 1 , k = 0
      ^~