Compilare: main.cpp: In function 'void solve_test1()': main.cpp:23:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (int i = 1; i < v.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'void solve_p1()': main.cpp:55:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for (int l = 0; l < s.size(); l++) | ~~^~~~~~~~~~