Compilare: main.cpp: In function 'void Add(Node*, int, int)': main.cpp:30:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | if( i == s.size() ) | ~~^~~~~~~~~~~ main.cpp: In function 'void Importance(Node*, int, int)': main.cpp:46:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | if( i == s.size() ) | ~~^~~~~~~~~~~ main.cpp: In function 'int Query(Node*, int)': main.cpp:72:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | if( i == s.size() ) | ~~^~~~~~~~~~~ main.cpp: In function 'void Mod()': main.cpp:88:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 88 | for( i=0; i<s.size(); i++ ) | ~^~~~~~~~~