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#!/usr/bin/python3 |
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# https://www.hackerrank.com/challenges/filling-jars |
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import sys |
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def nextints(): |
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return [ int(x) for x in sys.stdin.readline().split() ] |
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def new_candies(start, end, new_per_jar): |
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return (end - start + 1) * new_per_jar |
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def main(): |
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total = 0 |
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[num_jars, num_ops] = nextints() |
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for _ in range(num_ops): |
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[start, end, new_per_jar] = nextints() |
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total += new_candies(start, end, new_per_jar) |
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print(total // num_jars) |
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if __name__ == '__main__': |
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main() |