2

Author: kedebug

CountandSay/CountandSay.cpp

@@ -0,0 +1,26 @@
+class Solution {
+public:
+    string countAndSay(int n) {
+        // Start typing your C/C++ solution below
+        // DO NOT write int main() function
+        
+        string begin = "1";
+        for (int i = 0; i < n - 1; i++) {
+            string next;
+            int start = 0;
+            while (start < begin.size()) {
+                int end = start;
+                int count = 0;
+                while (end < begin.size() && begin[start] == begin[end]) {
+                    end += 1;
+                    count += 1;
+                }
+                next += char('0' + count);
+                next += begin[start];
+                start = end;
+            }
+            begin = next;
+        }
+        return begin;
+    }
+};