#include <stdio.h>
/*int factorial(int x){
int fact =1;
for( int i=1;i<=x;i++){
fact= fact*i;
}
return fact;
}
int combination (int n,int r){
int ncr=factorial(n)/(factorial(r)*factorial(n-r));
return ncr;
}*/
int main() {
int n;
for( int i=0;i<=n;i++){
for(int sp=1;sp<=n-i;sp++){
}
int first =1;
for(int j=0;j<=i;j++){
int first= first*(i-j)/(j+1);
}
}
return 0;
}
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