C :

#include<stdio.h>
int main()
{
	
	int i,j,n;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=n-i;j++)
		printf(" ");
		for(j=1;j<=2*i-1;j++)
		printf("%d",i);
		printf("\n");
		
		
		
		
	}
	
	
	return 0;
	
}

C++ :

#include<iostream>
using namespace std;
int main()
{
  int x;
  cin>>x;
  for (int i=1;i<=x;++i)
 {
   for (int j=1;j<=x-i;++j)
    cout<<" ";
   for (int k=1;k<=2*i-1;++k)
    cout<<i;
   cout<<endl;
  }
  return 0;
}