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#include <cstdio>
#include <algorithm>
using namespace std;
 
int T[1000007];
int A[1000007];
int P[1000007];
 
 
int main()
{
	int t, n;
 
	scanf("%d", &t);
	for(int zi=0; zi<t; zi++)
	{
		scanf("%d", &n);
		for(int i = 0; i < n; i++) scanf("%d", &T[i]);
 
		bool ok = true;
		for(int i = 0; i < n/2; i++) 
		{
			int suma = T[i] + T[n-1-i];
			if (suma & 1) ok = false;
			P[i]=suma/2; P[n-1-i]=P[i];
			A[i]=T[i]-P[i];
			A[n-1-i] = T[n-1-i] - P[n-1-i];
		}
		if (ok)
		{
			for(int i = 0; i < n; i++) printf("%d ", P[i]);
			printf("\n");
			for(int i = 0; i < n; i++) printf("%d ", A[i]);
			printf("\n");
		}else printf("NIE\n");
 
	}
	return 0;
}
 

prog.cpp: In function ‘int main()’:
prog.cpp:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result
prog.cpp:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result
prog.cpp:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result

1 1 
0 0 
3 3 3 3 
-2 -1 1 2 
NIE