Compilare: main.cpp: In function 'void solve()': main.cpp:34:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = 1; i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp:37:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while(i + z[i] < a.size() && a[i + z[i]] == a[z[i]]) | ~~~~~~~~~^~~~~~~~~~ main.cpp:48:22: 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 < a.size(); ++i) | ~~^~~~~~~~~~