How To Do File IO For Competitive Programming

1

Hello, Could You Please Help Me In Reading Input From input.txt And Printing It To output.txt In Java
Thanks

2
4

Thanks @akshitm16 It Worked Successfully, But This IO Method Is Not Working On Codeforces How Could I Achieve That
My Code:

package com.codeforces;

import java.io.*;
import java.util.Scanner;
import java.util.StringTokenizer;

public class Eshag_Loves_Big_Arrays {
    static int[] insertion_sort(int[] a){
        for (int i = 0; i < a.length; i++){
            int key = a[i];
            int j = i - 1;
            while (j>=0&&key<a[j]){
                a[j+1]=a[j];
                j--;
            }
            a[j+1]=key;
        }
        return a;
    }
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(
                new FileReader("input.txt"));
        PrintWriter pw=new PrintWriter(new
                BufferedWriter(new FileWriter("output.txt")));
        Scanner scin = new Scanner(br);
        int t = scin.nextInt();
        while (t-->0){
            int l = scin.nextInt();
            int[] a = new int[l];
            for (int i = 0 ; i < l; i++){
                int g = scin.nextInt();
                a[i]=g;
            }
            insertion_sort(a);
            int i = 0;
            while (i<l && a[i]==a[0]){
                i++;
            }
            String x = String.valueOf(l-i);
            pw.println(x);
        }
        pw.close();

    }
}

Please Help
Thanks Again

5

You can’t do it on cf. There’s no file system there. You can only do it locally.

6

Thanks @akshitm16