Compilare: user.cpp: In function ‘ll get(int)’: user.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < v[0].size() && v[0][i] <= l) i++; ^ user.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (dr < v[i].size()){ ^ user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (dr < v[i].size() && v[i][dr] - v[i][st] <= l) dr++; ^ user.cpp:22:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr == v[i].size() && (v[i][dr - 1] - v[i][st] > l || st == dr - 1)) st = dr; ^