Kitchen Timings

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The working hours of Chef’s kitchen are from $X$ pm to $Y$ pm $(1 \le X \lt Y \le 12)$. Find the number of hours Chef works. ### Input - The first line of input will contain a single integer $T$, denoting the number of test cases. - Each test case consists of two space-separated integers $X$ and $Y$ — the starting and ending time of working hours respectively. ### Output For each test case, ou

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solution.cppC++17

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