Borderou de evaluare (job #670641)

Compilare: main.cpp: In function 'int read()': main.cpp:22:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 22 | while( i < s.size() && isdigit( s[i] ) ) { | ~~^~~~~~~~~~ main.cpp:26:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 26 | while( i < s.size() && !isalpha( s[i] ) ) | ~~^~~~~~~~~~ main.cpp:29:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 29 | while( i < s.size() && isalpha( s[i] ) ) | ~~^~~~~~~~~~ main.cpp:31:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 31 | while( i < s.size() && !isdigit( s[i] ) ) | ~~^~~~~~~~~~ main.cpp:34:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 34 | while( i < s.size() && isdigit( s[i] ) ) { | ~~^~~~~~~~~~ main.cpp:38:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 38 | while( i < s.size() && !isdigit( s[i] ) ) | ~~^~~~~~~~~~ main.cpp:41:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 41 | while( i < s.size() && isdigit( s[i] ) ) { | ~~^~~~~~~~~~