Merge pull request #1279 from Frankheartusf/master

更新了0045 跳跃游戏II golang代码

problems/0045.跳跃游戏II.md

@@ -217,18 +217,26 @@ class Solution:
 ### Go
 ```Go
 func jump(nums []int) int {
-	dp:=make([]int ,len(nums))
-	dp[0]=0
+    dp := make([]int, len(nums))
+    dp[0] = 0//初始第一格跳跃数一定为0
 
-	for i:=1;i<len(nums);i++{
-		dp[i]=i
-		for j:=0;j<i;j++{
-			if nums[j]+j>i{
-				dp[i]=min(dp[j]+1,dp[i])
-			}
-		}
-	}
-	return dp[len(nums)-1]
+    for i := 1; i < len(nums); i++ {
+        dp[i] = i
+        for j := 0; j < i; j++ {
+            if nums[j] + j >= i {//nums[j]为起点,j为往右跳的覆盖范围,这行表示从j能跳到i
+                dp[i] = min(dp[j] + 1, dp[i])//更新最小能到i的跳跃次数
+            }
+        }
+    }
+    return dp[len(nums)-1]
+}
+
+func min(a, b int) int {
+    if a < b {
+        return a
+    } else {
+        return b 
+    }
 }
 ```