N 0 2 July 8, 2019 16 32 64 128 N 0 2 meaning N n0 * 2 t t N 2 == 0 means 0 n 2 time complexity N 2 == 0 python 0 n 25 w 0 n 2 4 N 2 0 3 N 2 0 5 N 2 0 1 N 0 sigma 2