diff --git a/S2OJ/17/17.cpp b/S2OJ/17/17.cpp
new file mode 100644
index 00000000..479bea97
--- /dev/null
+++ b/S2OJ/17/17.cpp
@@ -0,0 +1,36 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int t, n, ans;
+string s;
+bool flag;
+char last;
+
+int main() {
+    cin >> t;
+    while (t--) {
+        ans = 0;
+        cin >> n >> s;
+        while (!s.empty()) {
+            flag = false;
+            for (int i = 1; i < s.size(); i++) {
+                if (s[i - 1] == s[i]) {
+                    s.erase(s.begin() + i);
+                    flag = true;
+                    break;
+                }
+            }
+            if (!flag) {
+                s.erase(--s.end());
+            }
+            ans++;
+            last = *s.begin();
+            while (!s.empty() && last == *s.begin()) {
+                s.erase(s.begin());
+            }
+        }
+        cout << ans << endl;
+    }
+    return 0;
+}