NC61 两数之和

NC61 两数之和

两数之和_牛客题霸_牛客网 (nowcoder.com)

//map
//注：返回的数组下标从1开始算起
import java.util.*;
public class Solution {
    public int[] twoSum (int[] array, int target) {
        int[] ret=new int[0];
        HashMap map=new HashMap<>();
        for(int i=0;i
            if(map.containsKey(target-array[i])){
               return new int[]{map.get(target-array[i])+1,i+1};
            }else{
                map.put(array[i],i);
            }
        }
        return ret;
    }
}