If the current time is Y o'clock and X minutes (Y is an integer less than 12, X is an integer greater than 0 and less than 60), how many seconds have passed before it arrives at (Y+1) o'clock.
如果现在时间是Y点X分(Y是小于12的整数，X是大于0小于60的整数)，经过多少秒就到了(Y+1)点钟．
<gadget id="calculator">3_600 - 60</gadget>
<output>3_540</output>

<result>3_540</result>