Solution1029.java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

/**
 * Created by slade on 2019/7/19.
 */
public class Solution1029 {
 public int twoCitySchedCost(int[][] costs) {
 int candidate = costs.length;
 int[] vals = new int[candidate];
 int ans = 0;


 for (int i = 0; i < candidate; i++) {
 // 去A比去B贵的程度
 vals[i] = costs[i][0] - costs[i][1];
 // 全去B花多少钱
 ans += costs[i][1];
 }
 Arrays.sort(vals);
 for (int i = 0; i < candidate/2; i++) {
 ans+=vals[i];
 }
 return ans;
 }

 public static void main(String[] args) {
 Solution1029 s = new Solution1029();
 int[][] val = {{10,20},{30,200},{400,50},{30,20}};
 System.out.println(s.twoCitySchedCost(val));
 }


}