add new solutions

solutions/5/q547/solution.go

@@ -0,0 +1,25 @@
+package q547
+
+func walk(graph [][]int, i int, seen []bool) {
+	for j := range graph {
+		if graph[i][j] == 1 && !seen[j] {
+			seen[j] = true
+			walk(graph, j, seen)
+		}
+	}
+}
+
+func findCircleNum(isConnected [][]int) int {
+	seen := make([]bool, len(isConnected))
+
+	provinces := 0
+	for i := range len(isConnected) {
+		if !seen[i] {
+			walk(isConnected, i, seen)
+			provinces++
+		}
+	}
+	return provinces
+}
+
+var _ = findCircleNum