#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;



int rowSum(int mat[3][3],int row)
{
    int sum =0;
    for(int j=0;j<3;j++)
        sum += mat[row][j];
    return sum;
}

int colSum(int mat[3][3],int col)
{
    int sum=0;
    for(int i=0;i<3;i++)
        sum += mat[i][col];
    return sum;
}

int diag(int mat[3][3])
{
    int sum=0;
    for(int i=0;i<3;i++)
        sum += mat[i][i];
    return sum;
}

int diag1(int mat[3][3])
{
    return (mat[0][2] + mat[1][1] + mat[2][0]);
}

int isMagic(int mat[3][3]){
    int a = rowSum(mat,0);
    if( a == rowSum(mat,2) && a == rowSum(mat,1) && a == colSum(mat,1) && a == colSum(mat,2) && a == colSum(mat,0) && a == diag(mat) && a == diag1(mat) )
        return 1;
    else
        return 0;
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int matrix[3][3], res =0;;
    for(int i =0;i<3;i++){
        for(int j=0;j<3;j++){
            cin >> matrix[i][j];
        }
    }
    for(int i =0;i<3;i++){
        for(int j=0;j<3;j++){
            if(!isMagic(matrix))
            {
                matrix[2][2]++;                
            }
            else
            {
                res =1; break;
            }
            if(!isMagic(matrix))
            {
                matrix[i][j]-=2;                
            }
            else
            {
                res=1; break;
            }
            matrix[i][j]++;
        }
        if(res)
            break;
    } 
    cout << res;   
    return 0;
}