create dev channel

zeta/py/completed/6588.py

@@ -0,0 +1,26 @@
+import sys
+
+P = [2]
+K = [False] * 1000005
+K[2] = True
+for i in range(2, 1000000 - 1):
+    for p in P:
+        if i % p == 0:
+            break
+        elif p * p > i:
+            P.append(i)
+            K[i] = True
+            break
+    else:
+        P.append(i)
+        K[i] = True
+        break
+while True:
+    n = int(sys.stdin.readline())
+    if n == 0:
+        break
+    i = 2
+    while not (K[i] and K[n - i]):
+        i += 1
+    else:
+        print(n, "=", i, "+", n - i)