From 9ee4ae3e0a8204983d1969a6a6397d2c922b5530 Mon Sep 17 00:00:00 2001
From: Ang Chin Han <angch@tuxuri.com>
Date: Fri, 25 Dec 2020 15:14:40 +0800
Subject: [PATCH] feat(2020-25/angch): part1

---
 2020-25/angch/main.go | 44 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 2020-25/angch/main.go

diff --git a/2020-25/angch/main.go b/2020-25/angch/main.go
new file mode 100644
index 0000000..ee672ec
--- /dev/null
+++ b/2020-25/angch/main.go
@@ -0,0 +1,44 @@
+package main
+
+import (
+	"log"
+)
+
+func do(a, b int) (ret1 int, ret2 int) {
+
+	// 20201227
+	sub1, sub2 := 7, 7
+	target := a
+	loop1, loop2 := 0, 0
+	for loop1 = 1; sub1 != target; loop1++ {
+		sub1 *= 7
+		sub1 = sub1 % 20201227
+		// log.Println(ret1, sub1)
+	}
+
+	for loop2 = 1; sub2 != b; loop2++ {
+		sub2 *= 7
+		sub2 = sub2 % 20201227
+	}
+
+	e1, e2 := b, a
+	sub1, sub2 = b, a
+	log.Println("xform", sub1, loop1)
+	for i := 1; i < loop1; i++ {
+		sub1 *= e1
+		sub1 = sub1 % 20201227
+	}
+	for i := 1; i < loop2; i++ {
+		sub2 *= e2
+		sub2 = sub2 % 20201227
+	}
+	log.Println(sub1, sub2)
+
+	return ret1, ret2
+}
+
+func main() {
+	log.Println(do(5764801, 17807724))
+	//5764801
+	log.Println(do(8184785, 5293040))
+}