Problem	4sum
User	RandomCtfNoob
Submission Time	2026-01-21 17:35:43
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

4sum.cpp: In function ‘int main()’:
4sum.cpp:52:10: error: ‘class std::unordered_map<int, std::pair<int, int> >’ has no member named ‘contains’
52 | if (cd.contains(ab[i])){
| ^~~~~~~~
4sum.cpp:54:14: error: no match for ‘operator[]’ (operand types are ‘std::unordered_map<int, std::pair<int, int> >’ and ‘__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, std::pair<int, int> > >, std::pair<int, std::pair<int, int> > >::value_type’ {aka ‘std::pair<int, std::pair<int, int> >’})
54 | cout << cd[ab[i]].first << " " << cd[ab[i]].second;
| ^
In file included from /usr/include/c++/9/unordered_map:47,
from /usr/include/c++/9/functional:61,
from /usr/include/c++/9/pstl/glue_algorithm_defs.h:13,
from /usr/include/c++/9/algorithm:71,
from /usr/include/x86_64-li