15 lines
230 B
C
15 lines
230 B
C
#include <stdio.h>
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int main() {
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int n, k, result=1, factR=1;
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scanf("%d %d", &n, &k);
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for(int i=1; i<=k; i++) {
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result *= n-i+1;
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factR *= i;
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}
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printf("%d\n",result/factR);
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return 0;
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} |