Eroare de compilare: main.cpp: In function 'int main()': main.cpp:31:13: error: 'nxt' was not declared in this scope while(f[nxt] == true) ++nxt; ^~~ main.cpp:34:13: error: 'nxt' was not declared in this scope nxt = a[i] + 1; ^~~ main.cpp:36:27: error: overloaded function with no contextual type information prev = a[i] - 1; ^ main.cpp:37:20: error: no match for 'operator[]' (operand types are 'std::unordered_map<int, bool>' and '<unresolved overloaded function type>') while(f[prev] == true) --prev; ^ In file included from /usr/include/c++/6/unordered_map:48:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:117, from main.cpp:1: /usr/include/c++/6/bits/unordered_map.h:903:7: note: candidate: std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type& std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](const key_type&) [with _Key = int; _Tp = bool; _Hash = std::hash<int>; _Pred = std::equal_to<int>; _Alloc = std::allocator<std::pair<const int, bool> >; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type = bool; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type = int] operator[](const key_type& __k) ^~~~~~~~ /usr/include/c++/6/bits/unordered_map.h:903:7: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'const key_type& {aka const int&}' /usr/include/c++/6/bits/unordered_map.h:907:7: note: candidate: std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type& std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type&&) [with _Key = int; _Tp = bool; _Hash = std::hash<int>; _Pred = std::equal_to<int>; _Alloc = std::allocator<std::pair<const int, bool> >; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type = bool; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type = int] operator[](key_type&& __k) ^~~~~~~~ /usr/include/c++/6/bits/unordered_map.h:907:7: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::unordered_map<int, bool>::key_type&& {aka int&&}' main.cpp:37:38: error: no pre-decrement operator for type while(f[prev] == true) --prev; ^~~~ main.cpp:39:21: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator-' if(a[i] - prev <= nxt - a[i]) { ~~~~~^~~~~~ main.cpp:40:36: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator-' sol += 1LL * (a[i] - prev); ~~~~~^~~~~~ main.cpp:41:18: error: no match for 'operator[]' (operand types are 'std::unordered_map<int, bool>' and '<unresolved overloaded function type>') f[prev] = true; ^ In file included from /usr/include/c++/6/unordered_map:48:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:117, from main.cpp:1: /usr/include/c++/6/bits/unordered_map.h:903:7: note: candidate: std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type& std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](const key_type&) [with _Key = int; _Tp = bool; _Hash = std::hash<int>; _Pred = std::equal_to<int>; _Alloc = std::allocator<std::pair<const int, bool> >; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type = bool; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type = int] operator[](const key_type& __k) ^~~~~~~~ /usr/include/c++/6/bits/unordered_map.h:903:7: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'const key_type& {aka const int&}' /usr/include/c++/6/bits/unordered_map.h:907:7: note: candidate: std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type& std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type&&) [with _Key = int; _Tp = bool; _Hash = std::hash<int>; _Pred = std::equal_to<int>; _Alloc = std::allocator<std::pair<const int, bool> >; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::mapped_type = bool; std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::key_type = int] operator[](key_type&& __k) ^~~~~~~~ /usr/include/c++/6/bits/unordered_map.h:907:7: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::unordered_map<int, bool>::key_type&& {aka int&&}' main.cpp:30:9: warning: unused variable 'last' [-Wunused-variable] int last = -2e9; ^~~~ Non zero exit status: 1