Compilare: user.cpp: In member function ‘int HeavyLight<T, Acc>::DFSJump(int, int)’: user.cpp:159:2: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:163:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heavypath.in", "r", stdin); ^ user.cpp:164:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heavypath.out", "w", stdout); ^ user.cpp:114:5: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized] T ret; bool first; ^