模拟（Python）

思路：模拟题。根据题意进行模拟即可，可以写一次遍历，我这里写的是两次遍历，看着比较简单

代码：

import sys
input = lambda: sys.stdin.readline().strip()

import math
inf = 10 ** 18

def I():
    return input()

def II():
    return int(input())

def MII():
    return map(int, input().split())

def LI():
    return input().split()

def LII():
    return list(map(int, input().split()))

def LFI():
    return list(map(float, input().split()))

fmax = lambda x, y: x if x > y else y
fmin = lambda x, y: x if x < y else y
isqrt = lambda x: int(math.sqrt(x))

'''

'''

def solve():
    m = II()
    a = LII()
    n = II()

    ones1 = cnt1 = 0
    for i in range(0, m, 2):
        ones1 += a[i]
        cnt1 += 1

    ones2 = cnt2 = 0
    for i in range(1, m, 2):
        ones2 += a[i]
        cnt2 += 1

    if ones1:
        print("true" if ones1 + n <= cnt1 else "false")
    else:
        print("true" if ones2 + n <= cnt2 else "false")

t = 1
# t = II()
for _ in range(t):
    solve()