Compilare: user.cpp: In function ‘void lee()’: user.cpp:19:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < coada.size(); i++) ^ user.cpp: In function ‘void rez(int, int, std::list<std::pair<int, int> >::iterator)’: user.cpp:110:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < nod[x][y].size(); i++) ^ user.cpp:115:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < nod[a][b].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:131:11: warning: unused variable ‘j’ [-Wunused-variable] int i,k, j, p,xv,yv,t,xa,ya,xb,yb; ^