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  1. #include<stdio.h>
  2. int main()
  3. {
  4.    int n,rem,count=0;
  5.    scanf("%l64d",&n);
  6.    while(n!=0)
  7.    {
  8.    rem=n%10;
  9.    n=n/10;
  10.    if(rem!=7||rem!=4)
  11.    {
  12.    count++;
  13.    }
  14.    }
  15.    if(count>0)
  16.    printf("NO\n");
  17.    else
  18.    printf("YES\n");
  19.    return 0;
  20.     }
  21.  
Success #stdin #stdout 0s 9432KB
comments (?)
stdin
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2874
447
stdout
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YES
https://ideone.com/6aFT77
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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