30 lines
392 B
C
30 lines
392 B
C
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#include <stdio.h>
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int factorial(int n) {
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int ans = 1;
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for (int i = 2; i <= n; i++) {
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ans *= i;
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}
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return ans;
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}
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int nCr(int n, int r) {
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return factorial(n) / factorial(r) * factorial(n - r);
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}
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void main() {
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int n;
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int r;
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printf("Please enter n: ");
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scanf("%i", &n);
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printf("Please enter r: ");
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scanf("%i", &r);
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int ans = nCr(n, r);
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printf("The answer is: %i", ans);
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}
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