import java.util.Scanner;
public class Main {
/**
* 蚂蚱跳跃次数
*
* @param desPoint
* @return
*/
public static int jumpCount(int desPoint) {
int currentJumpPosition = 0;// 当前跳跃的位置
int jumpStep = 0;// 跳跃步进
int jumpCount = 0;// 跳跃次数
while (currentJumpPosition != desPoint) {// 循环，往一个方向跳跃
if (desPoint > 0)
jumpStep += 1; // 正方向
else {
jumpStep += -1;// 反方向
}
jumpCount++;
currentJumpPosition += jumpStep;// 加上步长
// 超过了
if ((desPoint > 0 && currentJumpPosition >
desPoint)
|| (currentJumpPosition < desPoint && desPoint
< 0)) {
jumpCount--;// 减一
currentJumpPosition -= jumpStep;// 减去步进
jumpStep -= 1;// 减一
boolean isForward = false;// 往后
if (desPoint < 0) {
isForward = true; // 往前
}
while (currentJumpPosition != desPoint) {// 来回跳跃，直到达到终点
jumpCount++;
if (isForward) {// 往前跳
if (jumpStep > 0) {
jumpStep = jumpStep + 1;
} else {
jumpStep = -jumpStep + 1;
}
} else { // 往后跳
if (jumpStep > 0) {
jumpStep = -jumpStep - 1;
} else {
jumpStep = jumpStep - 1;
}
}
isForward = !isForward;// 取反
currentJumpPosition += jumpStep;// 加上步长
}
}
}
return jumpCount;
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNext()) {
int desPoint = scanner.nextInt();// 目标位置
System.out.println(jumpCount(desPoint));
}
}
}
AC 17%
