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package ch22;

public class P89_2 {

public int majorityElement(int left, int right, int[] nums) {

// 최소 분할 단위 리턴

if (left == right)

return nums[left];

// 중앙 위치 인덱스 계산

int mid = left + (right - left) / 2;

int a = majorityElement(left, mid, nums);

int b = majorityElement(mid + 1, right, nums);

int countA = 0;

// 해당 구간의 a 개수 계산

for (int i = left; i <= right; i++) {

if (nums[i] == a)

countA++;

}

// a가 과반수를 넘으면 a 리턴

return countA > (right - left + 1) / 2 ? a : b;

}

public int majorityElement(int[] nums) {

return majorityElement(0, nums.length - 1, nums);

}

}