#include <stdio.h>
 
int kaijo( int n )
{
int i, y;
 
y= 1;
for( i=n ; i>1 ; i-- )
y = y * i;
 
return y;
}
 
int comb(int m,int k)
{
 int kumi=0;
 
 kumi=kaijo(m)/(kaijo(k)*kaijo(m-k));
 
return kumi;
}
int main(void) {
	int m,k;
		scanf("%d %d",&m,&k);
 
	printf("mを入力してください:%d\n",m);
	printf("kを入力してください:%d\n",k);
	printf("%d個の中から%d個を取り出す組み合わせは、%d通りです。",m,k,comb(m,k));
 
	return 0;
}

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

MTAgMw==

10 3