Compilare: main.cpp: In function 'std::ostream& operator<<(std::ostream&, answer)': main.cpp:26:5: warning: no return statement in function returning non-void [-Wreturn-type] 26 | } | ^ main.cpp: In function 'int main()': main.cpp:50:38: warning: 'left' may be used uninitialized [-Wmaybe-uninitialized] 50 | ans = {v.back(), left, i - left + 1}; | ~~^~~~~~ main.cpp:40:9: note: 'left' was declared here 40 | int left; | ^~~~