C :

#include<stdio.h>
main()
{
	int x1,x2,y1,y2,n,i,a[1000];
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&a[i]);
	}
	scanf("%d%d",&x1,&x2);
	scanf("%d%d",&y1,&y2);
	int k=y1-x1;
	for(i=x1-1;i<x2;i++)
	{
		int t=a[i];
		a[i]=a[i+k];
		a[i+k]=t;
	}
	for(i=0;i<n;i++)
	{
		printf("%d ",a[i]);
	}
}

C++ :

#include<iostream>
using namespace std;

int main(){
	
	int n;
	int a[21];
	int s1,s2,s3,s4;
	int t=0;
	 
	cin>>n;

	for(int i=1;i<=n;i++)
		cin>>a[i];
		
	cin>>s1>>s2;
	cin>>s3>>s4;
	
	int k=s3-s1; 

	for(int i=s1;i<=s2;i++){
		t=a[i];
		a[i]=a[i+k];
		a[i+k]=t;
	} 
	

	for(int i=1;i<n;i++){
		cout<<a[i]<<" "; 	
	}
	cout<<a[n];
}

Pascal :

var a:array[1..20] of longint;
   t,n,i,b,c,d,e,h:longint;
begin
  read(n);
  for i := 1 to n do
  read(a[i]);
  read(b,c,d,e);
  h := d - b;
   
  for i := b to c do
  begin
    t := a[i];
    a[i] := a[i + h];
    a[i + h] := t;
  end;
  for i := 1 to n do
  write(a[i],' ');
end.

Java :

import java.util.Scanner;


public class Main {
	
	
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		int [] a= new int [n];
		for(int i=0;i<n;i++){
			a[i]=sc.nextInt();
		}
		int p=sc.nextInt();
		int q=sc.nextInt();
		int x=sc.nextInt();
		int y=sc.nextInt();
		int[] b=new int[n];
		for(int i=0;i<p-1;i++){
			b[i]=a[i];
		}
		for(int i=0;i<q-p+1;i++){
			b[i+p-1]=a[i+x-1];
		}
		for(int i=q;i<x-1;i++){
			b[i]=a[i];
		}
		for(int i=0;i<y-x+1;i++){
			b[i+x-1]=a[i+p-1];
		}
		for(int i=y;i<n;i++){
			b[i]=a[i];
		}
		for(int i=0;i<n;i++){
			System.out.print(b[i]+" ");
		}
	}

}

Python :

n=int(input())
l1=list(map(int,input().split()))
a,b=map(int,input().split())
c,d=map(int,input().split())
k = c - a;
for i in range(a-1,b):
    t = l1[i]
    l1[i] = l1[i + k]
    l1[i + k] = t;
for i in l1:
    print(i,end=' ')