15 lines
315 B
Python
15 lines
315 B
Python
n = int(input())
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output = []
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row = 1
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for _ in range(n):
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costs = map(int, input().split())
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for col, cost in enumerate(costs, start=1):
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if cost >= 0:
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output.append([row, col, cost])
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row += 1
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print(len(output))
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for m in output:
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u, v, c = map(str, m)
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print(" ".join((u, v, c)))
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