Compilare: user.cpp: In function ‘bool check(int, int, int)’: user.cpp:53:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < veg.size(); ++i) { ^ user.cpp: In function ‘void solve()’: user.cpp:79:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < veg.size() / 2; ++i) { ^ user.cpp: In function ‘bool check(int, int, int)’: user.cpp:60:25: warning: control reaches end of non-void function [-Wreturn-type] veg.pop_back(); } ^ user.cpp: In function ‘void solve()’: user.cpp:91:9: warning: ‘dest’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (check(v, dest)) ^