16 lines
274 B
Python
16 lines
274 B
Python
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import io
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import sys
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sys.stdin = io.StringIO('''5 2 3
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3 1 6 2 5''') # 4
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n, l, r = map(int, input().split())
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a = list(map(int, input().split()))
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s = 0
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for i in range(n - 1):
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for j in range(i + 1, n):
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if l <= abs(a[i] - a[j]) <= r:
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s += 1
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print(s)
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