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

int main() {
 int size = 3;
   int matrix[3][3]; // = {{4,9,2},{3,5,7},{8,1,6}};
   int row, column = 0,small;
   int sum, sum1, sum2;
   int flag = 0;
 
  // printf("\nEnter matrix : ");
   for (row = 0; row < size; row++) {
      for (column = 0; column < size; column++)
         scanf("%d", &matrix[row][column]);
   }
 
   
   for (row = 0; row < size; row++) {
      //printf("\n");
      for (column = 0; column < size; column++) {
       //  printf("\t%d", matrix[row][column]);
      }
   }
 
   //For diagonal elements
   sum = 0;
   for (row = 0; row < size; row++) {
      for (column = 0; column < size; column++) {
         if (row == column)
            sum = sum + matrix[row][column];
      }
   }
 
   //For Rows
   for (row = 0; row < size; row++) {
      sum1 = 0;
      for (column = 0; column < size; column++) {
         sum1 = sum1 + matrix[row][column];
      }
      if (sum == sum1)
         flag = 1;
      else {
         flag = 0;
         break;
      }
   }
 
   //For Columns
   for (row = 0; row < size; row++) {
      sum2 = 0;
      for (column = 0; column < size; column++) {
         sum2 = sum2 + matrix[column][row];
      }
      if (sum == sum2)
         flag = 1;
      else {
         flag = 0;
         break;
      }
   }
    small=matrix[0][0];
 for(row=0;row<size;row++){
     for(column=1;column<size;column++){
         if(matrix[row][column]<small)
             {
             small=matrix[row][column];
         }
         
         
         
     }
 }
     
 printf("%d",small);
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */    
    return 0;
}