#include
using namespace std;
int main() {
int n,m;
cin>>n;
cin>>m;
int arr[n][m];
for(int i=0; i<n; i++){
for( int j=0;j<n;j++){
cin>>arr[i][j];
}
cout<<endl;
}
for(int row=0; row<n; row++){
if(row%2==0){
for(int col=0; col<n;col++){
cout<<arr[row][col]<<’,’<<’ ‘;
}
}
else{
for(int col=m-1; col>=0;col–){
cout<<arr[row][col]<<’,’<<’ ';
}
}
}
cout<<“END”<<endl;
return 0;
}
//getting the exact output still test cases not successful
//CODE IN JAVA BUT IT IS SHOWING RUN-TIME ERROR IN COMPILER!!! WHAT TO DO??
import java.util.*;
public class MyClass {
public static void main(String args[]) {
Scanner scn = new Scanner(System.in);
int M = scn.nextInt();
int N = scn.nextInt();
int[][] mat = new int[M][N];
int c1 = 0;
while (c1 < mat.length) {
int r1 = 0;
while (r1 < mat[0].length) {
mat[c1][r1] = scn.nextInt();
r1++;
}
c1++;
}
print(mat);
}
public static void print(int[][] mat) {
int c = 0;
while (c < mat.length) {
int r = 0;
while (r < mat[0].length) {
if (c % 2 == 0) {
System.out.print(mat[c][r] + ", ");
} else {
int ntp = 0;
ntp = mat.length - r - 1; // used to ulta print odd column
System.out.print(mat[c][ntp] + ", ");
}
r++;
}
c++;
}
System.out.println("END");
}
}