Added 1669C - Odd/Even Increments.cpp

Author: vikashpatel24

1669C - Odd Even Increments.cpp

@@ -0,0 +1,37 @@
+//                                 ॐ नमः शिवाय
+#include<bits/stdc++.h>
+using namespace std;
+#define ll long long
+ 
+// Code Written By: Vikash Patel
+// Codeforces Profile: https://codeforces.com/profile/vikashpatel
+ 
+int main()
+{
+    int t;
+    cin>>t;
+    while(t--)
+    {
+        int n;
+        cin>>n;
+        int a[n], i, maxi = 0;
+        for(i = 0; i < n; i++)
+        {
+            cin>>a[i];
+        }
+        bool no = false;
+        for(i = 0; i < n-2; i++){
+            if(a[i]%2 != a[i+2]%2) {
+                no = true;
+                break;
+            }
+        }
+        if(no) 
+        cout<<"NO"<<endl;
+        else 
+        cout<<"YES"<<endl;
+    }
+    return 0;
+}
+
+