Compilare: main.cpp: In function 'int main()': main.cpp:65:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len+1>=s[1].size() || len+1>=s[2].size() || (len+1>=s[3].size() && s[3].size()!=0) || (len+1>=s[4].size() && s[4].size()!=0) ) ~~~~~^~~~~~~~~~~~~ main.cpp:65:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len+1>=s[1].size() || len+1>=s[2].size() || (len+1>=s[3].size() && s[3].size()!=0) || (len+1>=s[4].size() && s[4].size()!=0) ) ~~~~~^~~~~~~~~~~~~ main.cpp:65:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len+1>=s[1].size() || len+1>=s[2].size() || (len+1>=s[3].size() && s[3].size()!=0) || (len+1>=s[4].size() && s[4].size()!=0) ) ~~~~~^~~~~~~~~~~~~ main.cpp:65:105: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len+1>=s[1].size() || len+1>=s[2].size() || (len+1>=s[3].size() && s[3].size()!=0) || (len+1>=s[4].size() && s[4].size()!=0) ) ~~~~~^~~~~~~~~~~~~ main.cpp:80:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s[i].size();++j) ~^~~~~~~~~~~~