n = int(input())
list = [0] * n
for i in range(n):
    list[i] = (int(input()))
idx = 0
max_width = 0;
cur_width = 0;
length = len(list)
while(idx < length):
    l, r = idx, idx
    while(l-1>=0 and list[l-1] <= list[l]):
        l -= 1
    while(r+1<length and list[r+1] <= list[r]):
        r += 1
    cur_width = r - l + 1
    if(cur_width > max_width):
        max_width = cur_width
    idx += 1
print(max_width)
    

第13个个测试无法通过，TLE，但我不清楚哪里耗时了？求教大佬～