Compilare: main.cpp: In function 'int main()': main.cpp:56:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int i = 1; i < v.size() - 1; ++ i) { | ~~^~~~~~~~~~~~~~ main.cpp:68:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for (int i = 0; i < k - 1 && i < w.size() && w[i] < 0; ++ i) | ~~^~~~~~~~~~ main.cpp: In function 'int sgn(int)': main.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type] 17 | } | ^