Hdu 1020 - Encoding

#include<stdio.h>
#include<string.h>
char str[10009];
int main()
{
int n, i, len, k;
char c;
scanf("%d", &n);
while(n--)
{
getchar();
scanf("%s",str);
i = 0;
len = strlen(str);
while(i<len)
{
c = str[i];
k = i;
while(str[i] == c && i<len)
i++;
if(i-k>1)
printf("%d%c",i-k,c);
else
printf("%c",c);
}
printf("\n");
}
return 0;
}