Not able to pass all testcases

#1

Can’t understand which testcase I am missing

#2

#include using namespace std; int main() { long long int n,digit,res=0,p=1; cin>>n; while(n!=0){ digit=n%10; n=n/10; if(digit>=5){ digit=9-digit; } res+=digitp; p=10; } cout<<res<<endl; return 0; }