Take two different numbers out of 100 numbers from 1 to 100 and add them together so that the sum is a multiple of 3. How many different ways are there?
在1～100的100个数中取出两个不同数相加，使其和是3的倍数，问有多少种不同取法．
<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<gadget id="calculator">33 * 16</gadget>
<output>528</output>

<gadget id="calculator">33 * 34</gadget>
<output>1_122</output>

<gadget id="calculator">528 + 1_122</gadget>
<output>1_650</output>

<result>1_650</result>