Codeforces 110A Solution - Nearly Lucky Number Solution In Java

Program

import java.util.*; public class x { public static void main(String args[]) { Scanner sc = new Scanner(System.in); String s = sc.next(); int f=0; char c[] = s.toCharArray(); for(int i=0;i<c.length;i++) { if(c[i]=='4' || c[i]=='7') { f++; } } if(f==0) { System.out.println("NO"); } else if(f>0) { if(f==4 || f==7 || f==47 || f==74) { System.out.println("YES"); } else { System.out.println("NO"); } } else { System.out.println("NO"); } } }

Output

I/P : 40047 O/P : NO

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