Compilare: main.cpp:77:74: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts' 77 | HeavyLight(vector <vector <int>>& _g, Iterator first, Iterator last, auto _f, T neut) : n(last - first), timer(0), g(_g), val(n + 1), sz(n + 1, 0), | ^~~~ main.cpp: In instantiation of 'HeavyLight<T>::HeavyLight(std::vector<std::vector<int> >&, Iterator, Iterator, auto:1, T) [with Iterator = int*; auto:1 = main()::<lambda(int, int)>; T = int]': main.cpp:123:91: required from here main.cpp:31:16: warning: 'HeavyLight<int>::val' will be initialized after [-Wreorder] 31 | vector <T> val; | ^~~ main.cpp:29:18: warning: 'std::vector<int> HeavyLight<int>::sz' [-Wreorder] 29 | vector <int> sz, head, par, link, h, tin, lg2, rev; | ^~ main.cpp:77:5: warning: when initialized here [-Wreorder] 77 | HeavyLight(vector <vector <int>>& _g, Iterator first, Iterator last, auto _f, T neut) : n(last - first), timer(0), g(_g), val(n + 1), sz(n + 1, 0), | ^~~~~~~~~~ main.cpp:30:27: warning: 'HeavyLight<int>::e' will be initialized after [-Wreorder] 30 | vector <vector <int>> e; | ^ main.cpp:29:52: warning: 'std::vector<int> HeavyLight<int>::rev' [-Wreorder] 29 | vector <int> sz, head, par, link, h, tin, lg2, rev; | ^~~ main.cpp:77:5: warning: when initialized here [-Wreorder] 77 | HeavyLight(vector <vector <int>>& _g, Iterator first, Iterator last, auto _f, T neut) : n(last - first), timer(0), g(_g), val(n + 1), sz(n + 1, 0), | ^~~~~~~~~~ main.cpp:89:62: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] 89 | e[i][j] = min(e[i][j - 1], e[i + (1 << j - 1)][j - 1]); | ~~^~~