Uva_272_TEX_Quotes

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char** argv) {
    char ch;int cont=0;
    while (scanf("%c",&ch)==1){
        if (ch=='"'){
            cont++;
            if (cont %2==0){
                printf("''");
            }else{
                printf("``");
            }
        }else{
            printf("%c",ch);
        }
    }
    return (EXIT_SUCCESS);
}