Jump Game II (最小步数到达终点，贪心) 【leetcode】

题目：

Given an array of non-negative integers, you are initially positioned at the first index of the array.

Each element in the array represents your maximum jump length at that position.

Your goal is to reach the last index in the minimum number of jumps.

For example:

Given array A = 

[2,3,1,1,4]

The minimum number of jumps to reach the last index is 

2

.
(Jump 

1

 step
from index 0 to 1, then 

3

 steps
to the last index.)

这题就是已知能到达终点，问最小的步数。

依旧贪心去推，贪心的规则就是在能够到达的范围之内，选择一个能够到达最远距离的点，更新步数，和更新最远到达的范围。

class Solution {
public:
int jump(int A[], int n) {
int maxx=0,temp=0,num=0;
for(int i=0;i<n;)
{
if(temp>=n-1)break;
while(i<=temp)
{
maxx=max(maxx,i+A[i]);
++i;
}
num++;
temp=maxx;
}
return num;

}
};