Compilare: main.cpp: In function 'void solve2()': main.cpp:101:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for(int i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:120:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 120 | for(int j=i+1;j<s.size();j++) | ~^~~~~~~~~ main.cpp:147:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 147 | for(int j=0;j<s.size();j++) | ~^~~~~~~~~ main.cpp:161:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 161 | for(int i=2;i<=s.size()+1;i++) | ~^~~~~~~~~~~~ main.cpp:175:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 175 | for(int i=1;i<=s.size()+1;i++) | ~^~~~~~~~~~~~