UVa10494 - If We Were a Child Again

#include   
#include   
const int maxsize=10000000;  
char s[maxsize],ans[maxsize];  
int main()  
{  
    char c;  
    long long b,a;  
    memset(s,0,maxsize);  
    while(scanf("%s %c %lld",s,&c,&b)!=EOF)  
    {  
        memset(ans,0,maxsize);  
        int i;  
        a=0;  
        int j=0;  
        int len=strlen(s);  
        for(i=0;i