Compilare: main.cpp: In function 'int main()': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();++i) ~^~~~~~~~~ main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<med.size();++i) ~^~~~~~~~~~~ main.cpp:31:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(indst==st.size()) ~~~~~^~~~~~~~~~~ main.cpp:39:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(indr==dr.size()) ~~~~^~~~~~~~~~~ main.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=med.size();++i) ~^~~~~~~~~~~~