Compilare: main.cpp: In function 'int findLca(int)': main.cpp:34:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (step <= currPath.size()) { ~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + step < currPath.size() && inSubtree(currPath[pos + step], otherNode)) { ~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:60:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lca.in", "r", stdin); ^ main.cpp:61:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lca.out", "w", stdout); ^