diff --git a/190524/circus/hIndex.js b/190524/circus/hIndex.js
new file mode 100644
index 0000000..d507e9f
--- /dev/null
+++ b/190524/circus/hIndex.js
@@ -0,0 +1,34 @@
+// 첫번째
+function solution(citations) {
+    var answer = 0;
+    while (true) {
+        if (citations.filter(x => { return x > answer }).length > answer) {
+            answer += 1;
+            continue;
+        }
+        break;
+    }
+    return Math.max.apply(null, citations) === 0 ? 0 : answer;
+}
+
+// 두번째
+
+function solution(citations) {
+    citations.sort((a, b) => b - a).unshift(0);
+    for (var i = citations.length - 1; i >= 0; i--) {
+        if (citations[i] >= i) return i;
+    }
+}
+
+// 세번째
+
+function solution(citations) {
+    citations = citations.sort((a, b) => a - b);
+    while (true) {
+        if (citations.findIndex(x => x < citations.length) !== -1) {
+            citations.shift();
+        } else {
+            return citations.length;
+        }
+    }
+}
\ No newline at end of file
diff --git a/190527/circus/exam.js b/190527/circus/exam.js
new file mode 100644
index 0000000..a5cac56
--- /dev/null
+++ b/190527/circus/exam.js
@@ -0,0 +1,19 @@
+function solution(answers) {
+    var num1 = [1, 2, 3, 4, 5];
+    var num2 = [2, 1, 2, 3, 2, 4, 2, 5];
+    var num3 = [3, 3, 1, 1, 2, 2, 4, 4, 5, 5];
+    var results = [0, 0, 0];
+    var winer = [];
+
+    answers.forEach((ans, i) => {
+        if (ans === num1[i % num1.length]) results[0] += 1;
+        if (ans === num2[i % num2.length]) results[1] += 1;
+        if (ans === num3[i % num3.length]) results[2] += 1;
+    })
+
+    var max = Math.max(...results);
+    results.forEach((result, i) => {
+        if (result === max) winer.push(i + 1);
+    })
+    return winer;
+}
\ No newline at end of file