Compilare: main.cpp: In function 'int main()': main.cpp:41:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++)if(z[i].size()>maxim)maxim=z[i].size(),nrmax=i; ~~~~~~~~~~~^~~~~~ main.cpp:48:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(z[i].size()>mat && i!=nrmax)mat=z[i].size(),nrmax1=i; ~~~~~~~~~~~^~~~