Compilare: user.cpp: In function ‘int main()’: user.cpp:34:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[s].size();i++){ ^ user.cpp:67:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[a].size() && D[b]>=v[a][i].x;i++){ ^