void version1(int mat1[N][N], int mat2[N][N], int result[N][N])
{
	int i, j, k;
	for (i = 0; i < N; ++i)
	{
		for (j = 0; j < N; ++j)
		{
			// Compute the value for result[i][j]. Initialize it to 0, then
			result[i][j] = result[0][0];
			// run through row i of mat1 and column j of mat2 in parallel and
			// multiply their elements pairwise and sum up the products.

			for (k = 0; k < N; ++k)
				result[i][j] += mat1[i][k] * mat2[k][j];
		}
	}
}