[Add] solved solutions

cpp/COOMILK.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+
+using namespace std;
+
+bool kiem_tra(int n)
+{
+    string s[50];
+    int i;
+    bool b = 1;
+    for (i = 0; i < n; i++)
+    {
+        cin >> s[i];
+    }
+    for (i = 0; i < n; i++)
+    {
+        if (s[i] == "cookie" && (i == (n - 1) || s[i + 1] == "cookie"))
+        {
+            b = 0;
+            break;
+        }
+    }
+    return b;
+}
+
+int main()
+{
+    int t, n;
+    cin >> t;
+    while (t--)
+    {
+        cin >> n;
+        if (kiem_tra(n))
+        {
+            cout << "YES" << endl;
+        }
+        else
+        {
+            cout << "NO" << endl;
+        }
+    }
+    return 0;
+}