day 17 q3 added in cpp and python #382

Author: Tech-neophyte

Day-17/q3: Jump Game/Tech-neophyte--cp.md

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+# Cpp Code
+<br /> 1. Update the variable maxreach with the next highest integer. It is the highest index it can jump upto at that point.
+<br /> 2. If index is greater than the index it can reach upto, return false. 
+
+```
+class Solution {
+public:
+    bool canJump(vector<int>& nums) {
+    int n = nums.size();
+    int maxReach = 0;
+    for (int i = 0; i < n; i++) {
+        if (i > maxReach) return false;
+        maxReach = max(maxReach, i + nums[i]);
+    }
+    return true;
+}
+};
+```
+# Python Code
+```
+class Solution:
+    def canJump(self, nums: List[int]) -> bool:
+        jump = 0
+        for n in nums:
+            if jump < 0:
+                return False
+            elif n > jump:
+                jump = n
+            jump -= 1
+            
+        return True
+```