help with a problem

[tepid beacon]

struggling with this issue

https://codeforces.com/problemset/problem/110/A

this is my code

#include <iostream>
using namespace std;

int main() {

   long n, c = 0;
   bool lucky = true;
   cin >> n;
   
   for( ; n > 0 ; n /= 10) {
       if(n%10 == 4 || n%10 == 7) {
           c++;
       }
   }
       
   for( ; c > 0 ; c /= 10) {
       if(c%10 != 4 && c%10 != 7) {
           lucky = false;
       }
   }
   
   if(lucky)
       cout << "YES";
   else
       cout << "NO";
}

[proud pier]

When your question is answered use !solved to mark the question as resolved.

Remember to ask specific questions, provide necessary details, and reduce your question to its simplest form. For tips on how to ask a good question use !howto ask.

[tepid beacon]

i dont get why my code keeps failing at test #7

chatgpt’s code works alright

even though both of our codes have got pretty much the same logic

[rustic quest]

!howto ask

[proud pier]

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[rustic quest]

It’s kind of hilarious how similar this post is to the other one just posted

[tepid beacon]

i provided everything

the output is either yes or no

the program fails on one of the tests for some reason

[rustic quest]

#1179509847687958538 message

[tepid beacon]

?

[rustic quest]

What that person said