B1 - Tokitsukaze and Good 01-String (easy version)

https://codeforces.com/contest/1678/submission/156370622

Codeforces/1678/B1/B1.cpp

@@ -0,0 +1,39 @@
+#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--) {
+        int ans = 0;
+
+        cin >> n >> s;
+
+        for (int i = 1, t = 1; i < s.size(); i++) {
+            if (s[i] != s[i - 1]) {
+                if (t & 1) {
+                    s[i] = s[i - 1];
+                    ans++;
+                    t++;
+                } else {
+                    t = 1;
+                }
+            } else {
+                t++;
+            }
+        }
+
+        cout << ans << endl;
+    }
+
+    return 0;
+}