Compilare: user.cpp: In function ‘int main()’: user.cpp:81:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (freq && (pos[i] + freq - 1 >= Where[V[i]].size() || Where[V[i]][pos[i] + freq - 1] > rt)) continue; ^ user.cpp:95:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (freq && (pos[i] + freq - 1 >= Where[V[i]].size() || Where[V[i]][pos[i] + freq - 1] > rt)) continue; ^ user.cpp:83:38: warning: ‘mode’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (new_freq == freq && V[i] < mode) mode = V[i]; ^ user.cpp:57:38: warning: ‘mode’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (VV[V[k]] == freq && V[k] < mode) mode = V[k]; ^