Class 51 selects a monitor from 49 students, Xiaohong, Xiaoming and Xiaohua are candidates. After counting 37 votes, it is found that Xiaohong has 15 votes, Xiaoming has 10 votes, and Xiaohua has 12 votes. Among the remaining votes, how many votes does Xiaohong get at least to ensure that she is elected as the monitor with the most votes.
五1班从49名学生中选一名班长，小红、小明和小华为候选人．统计完37张票后发现：小红15票，小明10票，小华12票．在余下的票中，小红至少再得多少票才能保证以最多票数当选班长．
<gadget id="calculator">15 + 10 + 12</gadget>
<output>37</output>

<gadget id="calculator">49 - 37</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<result>5</result>