include <stdio.h>

int main()
{
char strArr[5000] = {0};
char p = strArr;
fget(strArr,sizeof(strArr),stdio);
if(p)
return 0;
int iLen = strlen(p) -1;
char pTmp = p +iLen -1;
int iCnt = 0;
while(pTmp != ' ')
pTmp--;
return p-pTmp;
}