Compilare: main.cpp: In function 'int solve(std::__cxx11::string, std::__cxx11::string)': main.cpp:10:9: warning: unused variable 'posa' [-Wunused-variable] int posa(0) ; ^~~~ main.cpp:11:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:21:9: warning: unused variable 'ans' [-Wunused-variable] int ans = solve(a, b) ; ^~~