#include <stdio.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>

#define s_i(a) scanf("%d",(&a))
#define p_i(a) printf("%d",(a))
#define endl printf("\n")
#define p_l(a) printf("%ld",(a))
#define s_l(a) scanf("%ld",(&a))
#define s_ll(a) scanf("%lld",(&a))
#define p_ll(a) printf("%lld",(a))
#define forn(l,r) for(int i=l;i<r;i++)
#define p_u(a) printf("%u",a)
#define s_u(a) scanf("%u",(&a))
#define s_f(a) printf("%f",(&a))
#define s_lf(a) printf("%lf",(&a))
#define s_llf(a) printf("%llf",(&a))
#define forr(r,l) for(int i=r;i>=l;i--)
#define p_s(s) printf(s)
#define p_p printf(" ")
#define sqr(a) (a)*(a)

void get(FILE *in,long long * a){
    char c=0;
    long long ans=0;
    forn(0,4) {
        fread(&c, 1, 1, in);
        ans+=c<<(8*(3-i));
    }
    *a=ans;
}

int main(void) {
    FILE *in=fopen("matrix.in","rb");
    FILE *out=fopen("trace.out","wb");
    int n=0;
    char a=0;
    fread(&a, 1,1,in);
    n+=a;
    fread(&a,1,1,in);
    n=n*256+a;
    long long ans=0;
    forn(0,n){
        for(int j=0;j<n;j++){
            long long ch=0;
            get(in,&ch);
            //printf("%lld\n",ch);
            if(i==j)
                ans+=ch;
        }
    }
    int anses_help[64]={0};
    for(int i=0;ans>0;i++)
        anses_help[i]=ans%2,ans/=2;
    char anses[8]={0};
    int j=1;
    forn(0,63){
        if(i%8 == 0)
            j=0;
        anses[i/8]+=(int)pow(2,j)*anses_help[i];
        j++;
    }

    forn(0,8)
        fwrite(&anses[7 - i],1,1,out);

    fclose(in);
    fclose(out);
    return 0;
}