Compilare: user.cpp: In function ‘int solve1()’: user.cpp:34:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[node].size(); i++) { ^ user.cpp:47:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int solve2()’: user.cpp:65:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[node].size(); i++) { ^ user.cpp:81:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^