Compilare: main.cpp: In function 'int main()': main.cpp:45:30: warning: ignoring return value of 'constexpr std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]', declared with attribute 'nodiscard' [-Wunused-result] 45 | visited[neigh]; | ^ In file included from /usr/include/c++/12.2.1/vector:64, from main.cpp:3: /usr/include/c++/12.2.1/bits/stl_vector.h:1121:7: note: declared here 1121 | operator[](size_type __n) _GLIBCXX_NOEXCEPT | ^~~~~~~~ main.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for(int i = 1; i <= dist.size() - 1; i++) { | ~~^~~~~~~~~~~~~~~~~~