Compilare: main.cpp: In function 'void rez()': main.cpp:13:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for ( int i = 0 ; i < s.size() ; i++ ) | ~~^~~~~~~~~~ main.cpp:15:76: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 15 | while ( !st.empty() && st.top() < s[i] && s.size() - i + st.size() >= m ) | ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:17:24: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 17 | if ( st.size() < m ) | ~~~~~~~~~~^~~