CF2036A Quintomania

codeforces/cf2036a_quintomania.py

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+# Vicfred
+# https://codeforces.com/contest/2036/problem/A
+# implementation
+t = int(input())
+for melody in range(t):
+    n = int(input())
+    a = list(map(int, input().split()))
+    valid = True
+    for idx in range(n - 1):
+        diff = abs(a[idx] - a[idx + 1])
+        if diff != 5 and diff != 7:
+           valid = False
+    if valid:
+        print("Yes")
+    else:
+        print("No")