from array import array
X=array("i")
N=int(input())
S=0
p=0
X=[0]*N
for i in range(0,N):
X[i]=int(input())
for i in range(0,N):
if X[i]==170:
p=i
if p!=0:
print(p)
else:print('boiynyn uzyndygy 170 cm okushy jok')
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