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];
}

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=' ')