Compilare: main.cpp: In function 'int main()': main.cpp:11:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for (int i=1; i<=s.size(); i++) { | ~^~~~~~~~~~ main.cpp:12:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for (int j=1; j<=s.size(); j++) DP[i][j]=2000000000; | ~^~~~~~~~~~ main.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i=1; i<=s.size(); i++) DP[i][i]=3; | ~^~~~~~~~~~ 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 l=2; l<=s.size(); l++) { | ~^~~~~~~~~~ main.cpp:16:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i=1; i<=s.size()-l+1; i++) { | ~^~~~~~~~~~~~~~