C :

#include<stdio.h>
int main(){
	int n,i,x,y;
	scanf("%d",&n);
	int a[n+1];
	for(i=0;i<n;i++){
		scanf("%d",&a[i]);
	}
	scanf("%d%d",&x,&y);
	for(i=n-1;i>=x-1;i--){
		a[i+1] = a[i];
	}
	a[x-1] = y;
	for(i=0;i<n+1;i++){
		printf("%d ",a[i]);
	}
	return 0;
}

C++ :

#include <iostream>
 
using namespace std;
 
int main(){
    int n,i,t,x,y;
    cin>>n;
    int a[n + 1];
    for (i = 0;i < n;i++){
        cin>>a[i];
    }
    cin>>x;
    x--;
    cin>>y;
    for (i = n - 1;i >= x;i--){
        a[i + 1] = a[i];
    }
    a[x] = y;
    for (i = 0;i < n + 1;i++){
        cout<<a[i]<<" ";
    }
}

Python :

n=int(input())
l1=list(map(int,input().split()))
x=int(input())
y=int(input())
l1.insert(x-1,y)
for i in l1:
    print(i,end=' ')