Compilare: main.cpp: In function 'void solve()': main.cpp:46:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for ( int i = s1.size(); i < s2.size(); i ++ ) { | ~~^~~~~~~~~~~ main.cpp:47:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | if ( z[i] == s1.size() ) { | ~~~~~^~~~~~~~~~~~ main.cpp:54:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for ( int i = 0; i < ans.size(); i ++ ) | ~~^~~~~~~~~~~~