110A

Author: anasjawed283

Nearly_Lucky_Number.cpp

@@ -0,0 +1,25 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+    long long n;
+    cin >> n;
+    int count=0;
+    while (n!=0)
+    {
+        if (n% 10==4||n%10==7)
+        {
+            count += 1;
+        }
+        n/=10;
+    }
+    if(count==4||count==7)
+    {
+        cout << "YES" << endl;
+    }
+    else
+    {
+        cout <<"NO"<<endl;
+    }
+    return 0;
+}