>>592
#include <iostream>
using namespace std;
int main() {
int ch,cnt;
FILE *tmpf=tmpfile();
if(tmpf==NULL) return 1;
cnt=1;
while( (ch=getchar()) != EOF ) {
if( ch=='\n') cnt++;
fputc(ch,tmpf);
}
rewind(tmpf);
while( cnt>10 ) {
ch=fgetc(tmpf);
putchar(ch);
if( ch=='\n') cnt--;
}
fclose(tmpf);
return 0;
}