Compilare: main.cpp: In function 'int main()': main.cpp:15:18: 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(i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:19:21: 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(i < s.size() and isdigit(s[i])){ | ~~^~~~~~~~~~ main.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | else if(i < s.size() and isdigit(s[i])){ | ~~^~~~~~~~~~ main.cpp:41:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(j = i + 1; j < s.size(); j++){ | ~~^~~~~~~~~~ main.cpp:47:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | while(j < s.size() and isdigit(s[j])){ | ~~^~~~~~~~~~ main.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | else if(j < s.size() and isdigit(s[j])){ | ~~^~~~~~~~~~ main.cpp:68:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(j = 0; j < arr.size(); j++){ | ~~^~~~~~~~~~~~ main.cpp:79:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(j = i + 1; j < s.size(); j++){ | ~~^~~~~~~~~~ main.cpp:86:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | while(j < s.size() and isdigit(s[j])){ | ~~^~~~~~~~~~ main.cpp:93:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | else if(j < s.size() and isdigit(s[j])){ | ~~^~~~~~~~~~ main.cpp:13:9: warning: unused variable 'n' [-Wunused-variable] 13 | int n, i, j, nr = 0, cnt = 0; | ^