Compilare: main.cpp: In function 'int main()': main.cpp:19:52: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | while(s1[j-1]!=s2[0] and s1[j]!=s2[1] and j<s2.size()) | ~^~~~~~~~~~ main.cpp:23:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | if(j==s2.size()) | ~^~~~~~~~~~~ main.cpp:30:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while(j<s2.size() and p<s1.size()) | ~^~~~~~~~~~ main.cpp:30:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while(j<s2.size() and p<s1.size()) | ~^~~~~~~~~~ main.cpp:32:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | while(p<s1.size() and s1[p]!=s2[j]) | ~^~~~~~~~~~ main.cpp:38:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(p==s1.size()) | ~^~~~~~~~~~~