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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:-**

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