There are consecutive natural numbers starting from 1 written on the blackboard: 1, 2, 3, 4, ... 98, 99. Choose two numbers arbitrarily from them, and how many kinds are there in which the sum does not exceed 100.
黑板上写有从1开始的连续自然数：1，2，3，4，…98，99，从中任意选取两个数，其和不超过100的共有多少种．
<gadget id="calculator">2 + 98</gadget>
<output>100</output>

<gadget id="calculator">49 / 2</gadget>
<output>49/2 = around 24.5</output>

<gadget id="calculator">100 * (49/2)</gadget>
<output>2_450</output>

<result>2_450</result>