/* 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
{
{
int n=4, k=0;
for(int i=0; i<= n; i++){
for(int j=0; j<=k; j++){
}
k++;
}
}
}
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