@@ -0,0 +1,43 @@
+package S5;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class Boj_32281_유리구슬GlassBead {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        int N = Integer.parseInt(br.readLine());
+        String str = br.readLine();
+
+        long result = 0;
+        long cnt = 0;
+
+        for (int i = 0; i < N; i++) {
+            if (str.charAt(i) == '1') {
+                cnt++;
+            } else {
+                result += cnt * (cnt + 1) / 2;
+                cnt = 0;
+            }
+        }
+        result += cnt * (cnt + 1) / 2;
+
+        System.out.print(result);
+    }
+}
+
+
+
+
+
+/*
+
+
+      0   0   0   0   0
+    0   0   0   1   0   0
+  1   0   0   1   1   0   0
+1   1   0   1   1   1   0   1
+
+ */