fork(1) download 
  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cstring>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	int cnt=0, a=0, r=0, p=0;
  8. 	char s[25];
  9. 	scanf("%s", s);
  10. 	for(int i=0; i<strlen(s); i++) if(s[i]=='4' || s[i]=='7') cnt++;
  11. 	while(cnt>0) {
  12. 		a=cnt%10;
  13. 		cnt/=10;
  14. 		p++;
  15. 		if(a==4 || a==7) r++;
  16. 	}
  17. 	if(r==p && r>0) printf("YES");
  18. 	else printf("NO");
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 3344KB
comments (?)
stdin 
1000000000000000000
stdout 
NO
https://ideone.com/xkzcsK
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!