import matplotlib as mpl
import numpy as np
from scipy import signal
array = list(map(float, input().split(" ")))
max_skip=int(500*60/200)
sredn=30
amplituda=0.3
i=0
abc=[]
leng=len(array)
while i<leng:
    pod_arr=array[i:min(i+sredn, leng)]
    block=len(pod_arr)//3
    one,two,three = pod_arr[:block], pod_arr[block:block*2], pod_arr[block*2:]
    if len(one)==0 or len(two)==0 or len(three)==0:
        break
    min_1=min(one)
    max_2=max(two)
    max_2_ind=two.index(max_2) + block
    min_3=min(three)
    min_3_ind=three.index(min_3) + block * 2
    if max_2-min_1 > amplituda and max_2 - min_3 > amplituda:
        abc.append(i+max_2_ind)
        i+=min_3_ind + max_skip
    else:
        i+=1