september.cpp: In function 'int solve(ll, ll, std::vector<long long int>, std::vector<std::vector<long long int> >)':
september.cpp:18:42: warning: narrowing conversion of '(& S.std::vector<std::vector<long long int> >::operator[](0))->std::vector<long long int>::operator[](0)' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
18 | unordered_set<int> visited = {S[0][0]};
| ^
september.cpp:18:42: warning: narrowing conversion of '(& S.std::vector<std::vector<long long int> >::operator[](0))->std::vector<long long int>::operator[](0)' from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' [-Wnarrowing]
/usr/bin/ld: /tmp/ccBobOlk.o: in function `mtbpdhr2zxjo1o4i9oreohsbuzzl4s6u::taskcase()':
grader.cpp:(.text+0x50d): undefined reference to `solve(int, int, std::vector<int, std::allocator<int> >, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)'
collect2: error: ld returned 1 exit status