问题:215 = 32768 and the sum of its digits is 3+ 2 + 7 + 6 + 8 = 26.What is the sum of the digits of the number 21000?解决思路:粗略估计,21000是一个300多位的数,所以用数组来存储每一位的方式来表示。设置数组a[500],a[0]表示个位,初值为2,设置变量i,用来表示
问题:Starting in thetop left corner of a 2×2 grid, and only being able to move to the right anddown, there are exactly 6 routes to the bottom right corner.How many suchroutes are there through a 20×20 g
问题描述:Work out the first ten digits of the sum of the following one-hundred 50-digit numbers.371072875339021027987979982208375902465101357402504637693767749000971264812489697007805041701826053874324986
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