#include <stdio.h>

int m,n;

int main() {
    scanf("%d", &m);
    if(m==0) {
        printf("0");
    }
    while(m>0) {
        n=0;
        while(m>=2) {
            m=m-2;
            n++;
        }
        printf("%d", m);
        m=n;
    }
}

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