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@@ -12,7 +12,7 @@
"translatedContent": "<p>递归乘法。 写一个递归函数,不使用 * 运算符, 实现两个正整数的相乘。可以使用加号、减号、位移,但要吝啬一些。</p>\n\n<p> <strong>示例1:</strong></p>\n\n<pre>\n<strong> 输入</strong>A = 1, B = 10\n<strong> 输出</strong>10\n</pre>\n\n<p> <strong>示例2:</strong></p>\n\n<pre>\n<strong> 输入</strong>A = 3, B = 4\n<strong> 输出</strong>12\n</pre>\n\n<p> <strong>提示:</strong></p>\n\n<ol>\n<li>保证乘法范围不会溢出</li>\n</ol>\n",
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"difficulty": "Medium",
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"hints": [
"考虑将8乘以9看作是计算宽度为8、高度为9的矩阵中的单元数。",
"如果你想计算8×9矩阵中的单元格数可以先计算4×9矩阵中的单元格数然后加倍。",