笨笨的我又來發問囉！這次又碰到很奇怪的問題了啊～

系統上面寫

與正確輸出不相符(line:1)
您的答案為: 12 things taken                                  ...略
正確答案為: 12 things taken 5 at a time is 792 exactly.

一開始以為是換行　但是明明就會換啊？怎麼會這樣咧＝　＝

拜託各位高手救救我><

#include<stdio.h>
int main(void){
long long int N,M,C;
while(scanf("%I64d%I64d",&N,&M)!=EOF){
if(N==0&&M==0)
break;

long long int iN,iM,NF=1,MF=1;
if(N>M){
for(iN=1;iN<=M;iN++)  {
NF=NF*(N+1-iN);       }

for(iM=2;iM<=M;iM++)  {
MF=MF*iM;             }
       }
C=NF/MF;
  
printf("%I64d things taken %I64d at a time is %I64d exactly.",N,M,C);
printf("\n");
                            }
              }