Compilare: main.cpp: In member function 'void fenwick::update(long long int, long long int)': main.cpp:22:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | while(curr<tree.size()) { | ~~~~^~~~~~~~~~~~ main.cpp: In function 'void dfs(long long int, long long int, long long int)': main.cpp:44:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i=0;i<g[a].size();i++) { | ~^~~~~~~~~~~~