Solution of Codechef problem added

Array/Medium/YetAnotherPalindromeProblem.cpp

@@ -0,0 +1,32 @@
+// Problem Link: https://www.codechef.com/START60B/problems/ARRPAL
+
+// Solution:
+
+#include<bits/stdc++.h>
+using namespace std; 
+#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
+
+int main(){
+    fast;
+    int t = 1;
+    cin>>t;
+    while(t--){
+        int n;
+        cin>>n;
+        int m = n/2;
+        int arr[n];
+        for(int i = 0; i < n; i++) cin>>arr[i];
+        long long int sum = 0, f = 0;
+        for(int i = m - 1; i >= 0; i--){
+            long long int p = arr[i] + sum;
+            if(p > arr[n - i - 1]){
+                f = 1;
+                break;
+            }
+            sum += arr[n - i - 1] - p;
+        }
+        if(f) sum = -1;
+        cout<<sum<<"\n";
+    }
+    return 0;
+}