Geeksforgeeks Solution For " Number Pattern "

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Problem :- For a given number N. Print the pattern in the following form: 1 121 12321 1234321 for N=4.

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Solution :-

#include <iostream>
using namespace std;
int main() 
{
int t;
cin>>t;
while(t--)
{
   int n,i,j,k=1,flag=0;
   cin>>n;
   while(k<=n)
   {
   for(i=1;i<=k;i++)
   {
       cout<<i;
       if(i==n)
       flag=0;
   }
   if(flag==0)
   {
   for(j=k-1;j>=1;j--)
   cout<<j;
   }
   cout<<" ";
   k++;
   }
   cout<<endl;
}

return 0;
}

Output:-