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- #include<stdio.h>
- int fac(long long n,long long r){
- long long p=n-r,ans=1,ans1=1,ans2=1;
- while(n>1){
- ans*=n;
- n--;
- }
- printf("%lld\n",ans);
- while(r>1){
- ans1*=r;
- r--;
- }
- printf("%lld\n",ans1);
- while(p>1){
- ans2*=p;
- p--;
- }
- printf("%lld\n",ans2);
- long long npr=ans/ans2;
- long long ncr=ans/(ans1*ans2);
- printf("%lld %lld ",npr,ncr);
- }
- int main()
- {
- long long n,r;
- scanf("%lld%lld",&n,&r);
- fac(n,r);
- }
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