Solution754.java

/**
 * Created by slade on 2019/7/12.
 */
public class Solution754 {
 int tmp = 1;
 int sum = 0;

 public int reachNumber(int target) {
 target = Math.abs(target);
 while (true) {
 sum += tmp;
 if (target == sum) return tmp;
 if (sum > target) {
 if ((sum - target) % 2 == 0) {
 return tmp;
 } else if (tmp % 2 == 1) {
 return tmp + 2;
 } else {
 return tmp + 1;
 }
 }
 tmp += 1;

 }
 }

 public static void main(String[] args) {
 Solution754 s = new Solution754();
 System.out.println(s.reachNumber(4));
 }

}