题目地址:http://ac.jobdu.com/problem.php?cid=1040&pid=16
C语言源码:
#include<stdio.h>
int main()
{
int a[201],n,i,x;
while(scanf("%d",&n)!=EOF)
{
for(i=0;i<n;i++)
scanf("%d",&a[i]);
scanf("%d",&x);
i=0;
while(a[i]!=x&&i<n)
i++;
if(i==n)
printf("-1\n");
else
printf("%d\n",i);
}
}