challenges

commit 72830be8ea7559446661f921bd0f69dc614b5d69
parent 51aa43c4dc90e4c4d5ee2fd6f265118bc5b5f309
Author: Ryan Wolf <johnwayne@pseudony.ms>
Date:   Wed, 23 Dec 2015 15:33:12 -0500

port 21 to go

Diffstat:
A
projecteuler/021/021.go
 | 
23
+++++++++++++++++++++++

1 file changed, 23 insertions(+), 0 deletions(-)
diff --git a/projecteuler/021/021.go b/projecteuler/021/021.go
@@ -0,0 +1,23 @@
+package main
+
+import "fmt"
+
+func main() {
+  d := make(map[int]int)
+
+  sd := 0
+  for i := 1; i < 10000; i++ {
+    s := 0
+    for j := 1; j < i; j++ {
+      if i % j == 0 {
+        s += j
+      }
+    }
+    if s < i && d[s] == i {
+      sd += i
+      sd += s
+    }
+    d[i] = s
+  }
+  fmt.Println(sd)
+}