Compilare: main.cpp: In function 'int main()': main.cpp:15:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i=0; i<=s.size()-t.size(); i++){ | ~^~~~~~~~~~~~~~~~~~~ main.cpp:17:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | while (j<t.size() && s[i+j]==t[j]) | ~^~~~~~~~~ main.cpp:20:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | if (j==t.size()){ | ~^~~~~~~~~~