diff --git a/GCDOPS.py b/GCDOPS.py
new file mode 100644
index 0000000..786246b
--- /dev/null
+++ b/GCDOPS.py
@@ -0,0 +1,11 @@
+for _ in range(int(input())):
+    n = int(input())
+    l = list(map(int,input().split()))
+    for i in range(n):
+        if l[i]>0 and (i+1)%l[i]==0 and l[i]<=(i+1):
+            continue
+        else:
+            print('NO')
+            break
+    else:
+        print('YES')