运行 ID: 41692

Main.cc: In function ‘int main()’:
Main.cc:5:17: error: ‘n’ was not declared in this scope
  for(int i=1;i<=n;i++){
                 ^
Main.cc:9:17: error: ‘n’ was not declared in this scope
  for(int i=2;i<=n-1;i++){
                 ^
Main.cc:16:17: error: ‘n’ was not declared in this scope
  for(int i=1;i<=n;i++){
                 ^