Compilare: main.cpp: In function 'int main()': main.cpp:15:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l=0, j=0; l<s.size(); ++l){ ~^~~~~~~~~ main.cpp:16:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<s.size()&&mp[s[j]]<1){ ~^~~~~~~~~ main.cpp:29:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()){ ~^~~~~~~~~