Merge pull request #45 from vipu18/patch-5

Implement space optimized Frog Jump solution

Author: kartikey2991

CPP/dynamic-programming/Frog_Jump.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+#include <vector>
+#include <climits>
+#include <cmath>
+using namespace std;
+
+// Space Optimized Solution
+class Solution {
+public:
+    int frogJump(vector<int>& heights) {
+        int n = heights.size();
+        int prev = 0, prev2 = 0;
+        for(int i = 1; i < n; i++) {
+            int fs = prev + abs(heights[i] - heights[i-1]);
+            int ss = INT_MAX;
+            if(i > 1) ss = prev2 + abs(heights[i] - heights[i-2]);
+            int curr = min(fs, ss);
+            prev2 = prev;
+            prev = curr;
+        }
+        return prev;
+    }
+};
+
+int main() {
+    int n;
+    cout << "Enter number of stones: ";
+    cin >> n;
+    vector<int> heights(n);
+    cout << "Enter heights: ";
+    for(int i = 0; i < n; ++i) {
+        cin >> heights[i];
+    }
+    Solution sol;
+    int result = sol.frogJump(heights);
+    cout << "Minimum energy: " << result << endl;
+    return 0;
+}