add: 220218-CN [golang]

2202/220218-CN.go

@@ -0,0 +1,12 @@
+package main
+
+func findCenter(edges [][]int) int {
+	if edges[0][0] == edges[1][0] || edges[0][0] == edges[1][1] {
+		return edges[0][0]
+	}
+	return edges[0][1]
+}
+
+func main() {
+
+}