Uva 272 TEX Quotes

#include<stdio.h>
int main()
{
    int c,q=1;
    while((c=getchar())!=EOF)
    {
        if(c=='"')
        {
            printf("%s",q?"``":"''");
            q = !q;
        }
        else
            printf("%c",c);
    }
    return 0;
}