There are 20 gloves of 5 colors with the same specification (regardless of left and right), mixed in the box, feel the gloves from the box at will, at least how many gloves must be touched to ensure that four pairs of different colors (4 pairs) Different colors, each pair).
有规格相同的5种颜色的手套各20只(不分左右)，混装在箱内，任意从箱内摸手套，至少要摸出多少只手套才能保证配成颜色不同的四双(4种不同颜色，每种一双)．
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">60 + 2</gadget>
<output>62</output>

<result>62</result>