Sign Moves

Initially, Chef is at coordinate $0$ on X-axis. For each $i = 1, 2, \dots, N$ in order, Chef does the following: - If Chef is at a **non-negative** coordinate, he moves $i$ steps backward (i.e, his position's coordinate decreases by $i$), otherwise he moves $i$ steps forward (i.e, his position's coordinate increases by $i$). You are given the integer $N$. Find the final position of Chef on the X