Compilare: main.cpp:2:22: warning: '#pragma GCC optimize' is not a string or number [-Wpragmas] 2 | #pragma GCC optimize(Ofast) | ^~~~~ main.cpp: In function 'int main()': main.cpp:19:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i = 1; i < a.size() - 1; ++i) | ~~^~~~~~~~~~~~~~ main.cpp:48:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i = 1; i < b.size() - 1 && fake; ++i) | ~~^~~~~~~~~~~~~~