HDU/2032/main.c

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C
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2020-08-31 16:48:58 +00:00
#include <stdio.h>
unsigned long long c(int f_n, int l_n);
int main(void){
int numbers, if_first = 1;
while(scanf("%d",&numbers) != EOF){
int i,j;
if(if_first) if_first = 0;
else printf("\n");
for(i = 0; i < numbers; i++){
for(j = 0; j <= i; j++){
if(j) printf(" ");
printf("%lld",c(j,i));
}
printf("\n");
}
}
printf("\n");
return 0;
}
unsigned long long c(int f_n, int l_n){
unsigned long long res = 1;
int i;
if(f_n * 2 > l_n) f_n = l_n - f_n;
if(!f_n) return 1;
for(i = 0; i < f_n; i++) res *= l_n - i;
for(i = 1; i <= f_n; i++) res /= i;
return res;
}