blob: 6604a825a0dcb8f1e94c5338099f1f6225746145 (
plain)
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res = 0
with open("2.in") as f:
for i in f:
increasing = False
decreasing = False
safe = True
n = i.split()
prev = -1
for j in n:
j = int(j)
if prev == -1:
prev = j
continue
if prev < j:
increasing = True
elif prev > j:
decreasing = True
if (abs(prev - j) > 3 or prev == j or (j > prev and decreasing or j < prev and increasing or increasing and decreasing or not increasing and not decreasing)):
safe = False
# break
prev = j
if safe:
res += 1
print(res)
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