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T148.java
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38 lines (31 loc) · 944 Bytes
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import java.util.HashMap;
import java.util.Map;
/**
* @Author:Aliyang
* @Data: Created in 下午5:35 18-6-17
* two-sum：我的解法
* 思路：使用一个map，这里不能使用夹逼
**/
public class T148 {
public int[] twoSum(int[] numbers, int target) {
if (numbers.length<2||numbers==null)
return null;
Map<Integer,int[]> map=new HashMap<>();
for (int i=0;i<numbers.length-1;i++){
for (int j=i+1;j<numbers.length;j++){
int sum=numbers[i]+numbers[j];
if (!map.containsKey(sum)){
int[] a={i+1,j+1};
map.put(sum,a);
}
}
}
return map.get(target);
}
public static void main(String[] args){
T148 t=new T148();
int[] numbers=new int[]{0,4,3,0};
int[] res=t.twoSum(numbers,0);
System.out.println(res[0]+","+res[1]);
}
}