#include <stdio.h>
int main(void) {
int n,i=1,j=0,a;
do {
n=n/10;
j=j+1;
} while(a!=0);
do {
a = (n%i)-(n%(i*10));
i = i*10;
j = j-1;
if(a%2!=0){
} else {
}
} while (j!=0);
return 0;
}
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