20 lines
397 B
Python
20 lines
397 B
Python
import sys
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is_on = False
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sum = 0
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def main():
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global sum,is_on
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for line in sys.stdin:
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line = line.strip()
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if line.isdigit() & is_on:
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sum += int(line)
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elif line.lower() == "on":
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is_on = True
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elif line.lower() == "off":
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is_on = False
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elif line == "=":
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print(sum)
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if __name__ == "__main__":
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main()
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