mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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161 lines
15 KiB
JSON
161 lines
15 KiB
JSON
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"title": "Calculate Money in Leetcode Bank",
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"content": "<p>Hercy wants to save money for his first car. He puts money in the Leetcode bank <strong>every day</strong>.</p>\n\n<p>He starts by putting in <code>$1</code> on Monday, the first day. Every day from Tuesday to Sunday, he will put in <code>$1</code> more than the day before. On every subsequent Monday, he will put in <code>$1</code> more than the <strong>previous Monday</strong>.<span style=\"display: none;\"> </span></p>\n\n<p>Given <code>n</code>, return <em>the total amount of money he will have in the Leetcode bank at the end of the </em><code>n<sup>th</sup></code><em> day.</em></p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 4\n<strong>Output:</strong> 10\n<strong>Explanation:</strong> After the 4<sup>th</sup> day, the total is 1 + 2 + 3 + 4 = 10.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 10\n<strong>Output:</strong> 37\n<strong>Explanation:</strong> After the 10<sup>th</sup> day, the total is (1 + 2 + 3 + 4 + 5 + 6 + 7) + (2 + 3 + 4) = 37. Notice that on the 2<sup>nd</sup> Monday, Hercy only puts in $2.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 20\n<strong>Output:</strong> 96\n<strong>Explanation:</strong> After the 20<sup>th</sup> day, the total is (1 + 2 + 3 + 4 + 5 + 6 + 7) + (2 + 3 + 4 + 5 + 6 + 7 + 8) + (3 + 4 + 5 + 6 + 7 + 8) = 96.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= n <= 1000</code></li>\n</ul>\n",
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"Simulate the process by keeping track of how much money John is putting in and which day of the week it is, and use this information to deduce how much money John will put in the next day."
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