Python，停车场收费问题

Question

使用Python计算，停车场收费，一小时内免费，超过一小时后第一小时按4块收费，往后每小时收2块，后面不足一小时按一小时算，20块封顶。 求大神~

Answer 1

分段计算就行

<span class="hljs-keyword">import</span> math
x=<span class="hljs-built_in">float</span>(<span class="hljs-built_in">input</span>())
<span class="hljs-built_in">sum</span>=<span class="hljs-number">0</span>
<span class="hljs-keyword">if</span> x<=<span class="hljs-number">1</span>:
    <span class="hljs-built_in">sum</span>=<span class="hljs-number">0</span>
<span class="hljs-keyword">elif</span> x<=<span class="hljs-number">2</span>:
    <span class="hljs-built_in">sum</span>+=<span class="hljs-number">4</span>
<span class="hljs-keyword">else</span>:
    <span class="hljs-built_in">sum</span>+=<span class="hljs-number">4</span>
    <span class="hljs-built_in">sum</span>+=math.ceil(x-<span class="hljs-number">2</span>)*<span class="hljs-number">2</span>
<span class="hljs-keyword">if</span> <span class="hljs-built_in">sum</span><=<span class="hljs-number">20</span>:
    <span class="hljs-built_in">print</span>(<span class="hljs-built_in">sum</span>)
<span class="hljs-keyword">else</span>:
    <span class="hljs-built_in">print</span>(<span class="hljs-number">20</span>)