Compilare: main.cpp: In function 'int main()': main.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:70:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sir.size();i++) ~^~~~~~~~~~~ main.cpp:73:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<sir.size() && sir[i]!=' ') ~^~~~~~~~~~~