Maximum Number of Balls in a Box
给一个上界和下界, 求中间所有数字的数字和的出现次数.
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class Solution { public int countBalls(int lowLimit, int highLimit) { Map<Integer, Integer> map = new HashMap<>(); for(int i = lowLimit; i <= highLimit; i++) { int sum = 0; int j = i; while(j > 0) { sum += (j % 10); j /= 10; } map.put(sum, map.getOrDefault(sum, 0) + 1); } int max = Integer.MIN_VALUE; for(Integer i : map.values()){ max = Math.max(max, i); } return max; } } |