Compilare: main.cpp:36:16: warning: multi-character character constant [-Wmultichar] 36 | out << '0\n'; | ^~~~~ main.cpp: In function 'int main()': main.cpp:57:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(int i = 1; i < v.size(); i++){ | ~~^~~~~~~~~~ main.cpp:51:9: warning: unused variable 'x' [-Wunused-variable] 51 | int x = 1, y = 1; | ^ main.cpp:51:16: warning: unused variable 'y' [-Wunused-variable] 51 | int x = 1, y = 1; | ^