Compilare: user.cpp: In function ‘ll get(int)’: user.cpp:13:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (st < v[i].size()){ ^ user.cpp:15:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (dr + 1 < v[i].size() && v[i][dr + 1] - v[i][st] <= l) dr++; ^ user.cpp:16:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr == v[i].size() - 1) ans += (dr - st)*(dr - st + 1)/2, st = dr; ^