34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
"""
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Pero has negotiated a Very Good data plan with his internet provider. The
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provider will let Pero use up X megabytes to surf the internet per month. Each
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megabyte that he doesn’t spend in that month gets transferred to the next month
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and can still be spent. Of course, Pero can only spend the megabytes he
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actually has.
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If we know how much megabytes Pero has spent in each of the first N months of
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using the plan, determine how many megabytes Pero will have available in the
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N+1 month of using the plan.
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Input
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The first line of input contains the integer X (1≤X≤100). The second line of
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input contains the integer N (1≤N≤100). Each of the following N lines contains
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an integer Pi (0≤Pi≤10000), the number of megabytes spent in each of the first
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N months of using the plan. Numbers Pi will be such that Pero will never use
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more megabytes than he actually has.
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Output
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The first and only line of output must contain the required value from the
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task.
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"""
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import sys
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x = int(sys.stdin.readline())
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n = int(sys.stdin.readline())
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p = (n + 1) * x
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for _ in range(n):
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p -= int(sys.stdin.readline())
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print(p)
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