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- n, tam = map(int, raw_input().split())
- lista = map(int, raw_input().split())
- lista.sort()
- pastas = 0
- ini = 0
- fim = n-1
- while ini < fim:
- if lista[ini] + lista[fim] > tam:
- pastas += 1
- fim -= 1
- else:
- pastas += 1
- ini += 1
- fim -= 1
- if ini == fim:
- pastas += 1
- print pastas
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