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- // Tinh to hop n,k
- //
- // Khai bao cac ham thu vien neu co
- #include<stdio.h>
- #include<conio.h>
- long giaithua(int x)
- {
- if(x==0||x==1)
- return 1;
- else
- {
- long s=1;
- for(int i=2;i<=x;i++)
- {
- s=s*i;
- }
- return s;
- }
- }
- void main()
- {
- long n,k;
- scanf("%ld%ld",&n,&k);
- double t;
- for(int i=0;i<=n;i++)
- {
- for(int j=0;j<=k;j++)
- {
- t=(double)(giaithua(i))/((giaithua(k))*(giaithua(i-k)));
- }
- }
- printf("%.0lf",t);
- }
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