Count Inversion in array.txt

/*package whatever //do not write package name here */

import java.util.*;
import java.lang.*;
import java.io.*;

class GFG {
    public static int solve(int[] arr,int n){
        int c=0;
        for (int i = 0; i < n-1; i++) 
            for (int j = 0; j < n-i-1; j++) 
                if (arr[j] > arr[j+1]) 
                { 
                    // swap arr[j+1] and arr[i] 
                    int temp = arr[j]; 
                    arr[j] = arr[j+1]; 
                    arr[j+1] = temp; 
                    c++;
                } 
        
        return c;
    }
	public static void main (String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

int t = Integer.parseInt(br.readLine());
while(t-- > 0){
int n = Integer.parseInt(br.readLine());
int a[] = new int[n];

String line = br.readLine();
int i = 0;
for (String numStr: line.split("\\s")){
a[i] = Integer.parseInt(numStr);
i++;
}

int ans = solve(a,n);
System.out.println(ans);
		}
	}
}