40 lines
688 B
Java
40 lines
688 B
Java
package list;
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/**
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* @file PivotIndex.java
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* @apiNote https://leetcode-cn.com/leetbook/read/array-and-string/yf47s/
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* @author zeekling
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* @version 1.0
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* @date 2020-08-16
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*/
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public class PivotIndex {
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public int pivotIndex(int[] nums){
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int sum = 0;
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int len = nums.length;
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for (int i=0; i< len;i++){
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sum += nums[i];
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}
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int idx = -1;
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int leftSum = 0;
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for (int i=0;i<len;i++){
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if ((leftSum * 2 + nums[i]) == sum){
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return i;
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}
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leftSum += nums[i];
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}
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return -1;
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}
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public static void main(String[] args){
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int[] arr = new int[]{1, 7, 3, 6, 5, 6};
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PivotIndex pro = new PivotIndex();
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int res = pro.pivotIndex(arr);
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System.out.println(res);
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}
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}
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