Leap year checker Calculator

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Checkes if a given year is leap year or not.

Leap year checker
Year
    3. (1582～)
    1.  
[ Algorithm ]
if year is not divisible by 4 then it is a common year
else if year is not divisible by 100 then it is a leap year
else if year is not divisible by 400 then it is a common year
else it is a leap year
    Leap year checker
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