go: add «2582. Pass the Pillow»

Signed-off-by: Matej Focko <me@mfocko.xyz>

go/pass-the-pillow.go

@@ -0,0 +1,10 @@
+package main
+
+func passThePillow(n int, time int) int {
+	rounds, leftover := time/(n-1), time%(n-1)
+
+	if rounds%2 == 0 {
+		return leftover + 1
+	}
+	return n - leftover
+}