A - Palindromic Indices

https://codeforces.com/contest/1682/submission/158020857

Codeforces/1682/A/A.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+#include <string>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+int t, n;
+std::string s;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    cin >> t;
+
+    while (t--) {
+        cin >> n >> s;
+
+        s = ' ' + s;
+
+        int mid = n & 1 ? n / 2 : n / 2 - 1;
+        int ans = 2 - (n & 1);
+
+        for (int i = mid; i && s[i] == s[i + 1]; i--) ans += 2;
+
+        cout << ans << endl;
+    }
+
+    return 0;
+}