Eroare de compilare: user.cpp:4:16: error: expected ‘]’ before numeric constant #define maxn 3 000 010 ^ user.cpp:10:7: note: in expansion of macro ‘maxn’ int v[maxn]; ^ user.cpp: In function ‘int main()’: user.cpp:17:13: error: ‘v’ was not declared in this scope in>>v[i]; ^ user.cpp:19:17: error: ‘v’ was not declared in this scope nth_element(v+1,v+k,v+n+1); ^ user.cpp:21:10: error: ‘a’ was not declared in this scope out<<a[k]; ^