Main.cc:7:5: error: expected initializer before ‘node’ nde node [10005] ; ^~~~ Main.cc: In function ‘int main()’: Main.cc:23:11: error: ‘dot’ was not declared in this scope cin >> dot [j] ; ^~~ Main.cc:25:10: error: ‘dot’ was not declared in this scope sort ( dot + 1 , dot + n + 1 , greater ( ) ) ; ^~~ Main.cc:19:7: warning: unused variable ‘k’ [-Wunused-variable] int k = 0 , ans = 0 ; ^ Main.cc:19:15: warning: unused variable ‘ans’ [-Wunused-variable] int k = 0 , ans = 0 ; ^~~