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ft, 数据这么恶心.consisting only of characters p through z and N, C, D, E, and I. Each sentence is ended by a new-line characterIn Reply To:奇怪，实在想不出错那了。 Posted by:hujialie at 2003-05-31 22:54:40 > #include "stdio.h"
> int sentence;
> char sen[300];
>
> int main()
> {
> int i;
> while(scanf("%s",sen)==1)
> {
> sentence=0;
> for(i=0;sen[i]!=0;i++);
> for(i--;i>=0;i--)
> {
> if(sen[i]=='C'||sen[i]=='D'||sen[i]=='E'||sen[i]=='I')
> {
> if(sentence>=2)sentence--;
> else
> {
> sentence=0;
> break;
> }
> }
> else
> {
> if(sen[i]=='N')
> {
> if(sentence>=1)continue;
> else break;
> }
> else
> {
> if(sen[i]>='p'&&sen[i]<='z')
> {
> sentence++;
> continue;
> }
> else
> {
> sentence=0;
> break;
> }
> }
> }
> }
> if(sentence==1)printf("YES\n");
> else printf("NO\n");
> }
> printf("%c",-1);
> return 0;
> }
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