Compilare: main.cpp: In function 'int main()': main.cpp:67:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for(int k=1;k<=s.size();k++){ | ~^~~~~~~~~~ main.cpp:68:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int k1=k;k1<=s.size();k1++){ | ~~^~~~~~~~~~ main.cpp:76:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int j=0;j<s1.size();j++){ | ~^~~~~~~~~~ main.cpp:85:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int k=0;k<s.size();k++){ | ~^~~~~~~~~ main.cpp:108:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 108 | for(int i=1;i<=s.size();i++){ | ~^~~~~~~~~~ main.cpp:114:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 114 | for(int lung=2;lung<=s.size();lung++){ | ~~~~^~~~~~~~~~ main.cpp:115:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 115 | for(int i=1;i+lung-1<=s.size();i++){ | ~~~~~~~~^~~~~~~~~~