Compilare: main.cpp: In function 'int main()': main.cpp:127:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<gr[i].size();j++) ~^~~~~~~~~~~~~ main.cpp:146:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<gr[acum].size();j++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'bool compare(wow, wow)': main.cpp:65:1: warning: control reaches end of non-void function [-Wreturn-type] } ^