Compilare: main.cpp: In function 'void rez()': main.cpp:14:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for ( int i = 0 ; i < s.size() ; i++ ) | ~~^~~~~~~~~~ main.cpp:16:76: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 16 | while ( !st.empty() && st.top() < s[i] && s.size() - i + st.size() >= m ) | ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:18:24: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 18 | if ( st.size() < m ) | ~~~~~~~~~~^~~