Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:38:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int i = 0; i < nodes.size() - 1; ++i) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp:42:56: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | if (isFriendlyBase[nodes[i]] == 1 || i + 1 == nodes.size() - 1) { | ~~~~~~^~~~~~~~~~~~~~~~~~~