from collections import deque

N = int(input())
H = list(map(int, input().split()))

color = deque([[0, 10**9+1]])
cnt = 0

for i, h in enumerate(H):
    is_green = bool(i%2)

    left = 0
    idx = 0
    while color[0][1] <= h:
        c = color.popleft()
        if idx % 2 == 0:
            cnt += (c[1] - c[0]) * (-1 if is_green else 1)
        idx += 1

    c = color.popleft()
    if idx % 2 == 0:
        cnt += (h - c[0]) * (-1 if is_green else 1)
    else:
        h = c[1]
        if color:
            c = color.popleft()

    for a in [[h, c[1]], [0, h]]:
        if a[0] != a[1]:
            color.appendleft(a)

    print(cnt)