Compilare: main.cpp: In function 'int main()': main.cpp:14:59: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 14 | while(!st.empty()&&st.top()<s[i]&&(st.size()+n-i-1>=m)) | ~~~~~~~~~~~~~~~^~~ main.cpp:16:21: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 16 | if(st.size()<m) | ~~~~~~~~~^~