唉！附件没传上来！我另外发表吧！

把数组开大点.

数组开的大了之后，就超时了！小了还是上面的错误啊！另外问一下！字符数组要如何初始化啊！
#include <stdio.h>
#include <string.h>
#define N 10000
#define M 10000

int main(void)
{
char str1[N], str2[M];
int i, n = 0, step1 = 0, step2 = 0;

while(scanf("%s", str1) != EOF)
{
scanf("%s", str2);
for(i = 0;i < strlen(str2);i ++)
{
if(str1[step1] == str2[step2])
{
n ++;
step1 ++;
step2 ++;
}
else
{
step2 ++;
}
}
if(n == strlen(str1))
{
printf("YES\n");
}
else
{
printf("NO\n");
}
n = 0;
step1 = 0;
step2 = 0;
}

return 0;

}

#include <stdio.h>

int main(void)
{
int n, j = 1, num = 0;
long long i;

scanf("%d", &n);

for(i = 1;;i = i*10 + j)
{
j = 1;
num ++;
if(i%n == 0)
break;
}
printf("%-5d", num);

return 0;

}