Compilare: main.cpp: In function 'void initial()': main.cpp:62:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int a=0; a<s.length(); a++) | ~^~~~~~~~~~~ main.cpp:64:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int b=a; b<s.length(); b++) | ~^~~~~~~~~~~ main.cpp: In function 'void debug()': main.cpp:75:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | for(int l=0; l<s.length(); l++) | ~^~~~~~~~~~~ main.cpp:77:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for(int a=0; a + l < s.length(); a++) | ~~~~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:121:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for(int a=0; a<s.length(); a++) | ~^~~~~~~~~~~ main.cpp:128:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | for(int l = 1; l < s.length(); l++) | ~~^~~~~~~~~~~~ main.cpp:136:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | for(int a = 0; a + l < s.length(); a++) | ~~~~~~^~~~~~~~~~~~ main.cpp:152:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 152 | for(int a = 0; a + l < s.length(); a++) | ~~~~~~^~~~~~~~~~~~