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- // Nhap vao moot so xac dinh so do chia het cho 3 hay ko
- // Khai bao ham thu vien neu co
- #include<stdio.h>
- #include<conio.h>
- void main()
- {
- long n;
- scanf("%ld",&n);
- long m=n;
- long a;
- long s=0;
- while(n!=0)
- {
- a=n%10;
- s=s+a;
- n=n/10;
- }
- if(s%3==0)
- {
- printf("%ld chia het cho 3",m);
- }
- else
- {
- printf("%ld khong chia het cho 3",m);
- }
- }
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