/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
// your code goes here
int[][] arr = {{1,3},{1,2},{7,8},{8,10}};
// for(int[] i : arr){
// System.out.println(i[0] + " " + i[1]);
// }
// if(a[0]<b[0])
// return -1;
// else if(a[0]>b[0])
// return 1;
// else{
// if(a[1]<b[1])
// return -1;
// else if(a[1]>b[1])
// return 1;
// else
// return 0;
// }
if(Integer.
compare(a
[0],b
[0]) == 0){ } else {
}
});
for(int[] i : arr){
System.
out.
println(i
[0] + " " + i
[1]); }
}
}
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