Compilare: main.cpp: In function 'int main()': main.cpp:37:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();++i) ~^~~~~~~~~ main.cpp:39:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l+s[i].size()+1>maxx) ~~~~~~~~~~~~~~~^~~~~ main.cpp:59:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=last;i<s.size();++i) ~^~~~~~~~~ main.cpp:62:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i+1<s.size()) fout<<" "; ~~~^~~~~~~~~