Compilare: main.cpp: In function 'long long int solve(const std::string&)': main.cpp:20:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | while (lefty < all.size()) { | ~~~~~~^~~~~~~~~~~~ main.cpp:24:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i = lefty; i < all.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:30:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while (lefty < all.size() && all[lefty] == 0) lefty++; | ~~~~~~^~~~~~~~~~~~