Compilare: main.cpp: In function 'std::vector<int> solve(std::vector<int>)': main.cpp:66:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for(int i = 0; i + 1 < nodes.size(); i++) res.emplace_back(lca(nodes[i], nodes[i + 1])); | ~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:86:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for(int i = 0; i < nodes.size(); i++) printf("%d%c", nodes[i], " \n"[i + 1 == nodes.size()]); | ~~^~~~~~~~~~~~~~ main.cpp:86:77: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for(int i = 0; i < nodes.size(); i++) printf("%d%c", nodes[i], " \n"[i + 1 == nodes.size()]); | ~~~~~~^~~~~~~~~~~~~~~