Find the minimum element in each column of the matrix ?

import java.util.*;
public class Main
{
static void Task(int r,int c,int a[][])
{
for(int i=0;i<c;i++)
{
int min=a[0][i];
for(int j=0;j<r;j++)
{
if(a[j][i]<min)
min=a[j][i];
}
System.out.print(min+" ");
}
}
public static void main(String[] args)
{
Scanner s=new Scanner(System.in);
int r=s.nextInt();
int c=s.nextInt();
int a[][]=new int[r][c];
for(int i=0;i<r;i++)
for(int j=0;j<c;j++)
a[i][j]=s.nextInt();
Task(r,c,a);
}
}