用c++解决下述问题:描述 Some words have power. It can make a string containing it become more powerful (larger weight). The weight of a word in a string is defined as the number of its occurences in the string multiplied by its value, while the weight of the string is defined as the sum of all words' weights. Given some words with their values, you should output the string consisting of these words which make the string's weight maximal. 输入 The input consists of multiple test cases. The first line of the input is an integer T, indicating the number of the test cases. Each test case starts with a line consisting of two integers: N and M, indicating the string's maximum length and the number of the words. Each of the following M lines consists of a word Wi. The last line of each test case consists of M integers, while the i-th number indicates the value Vi of Wi. Technical Specification: 1. T ≤ 15 2. 0 < N ≤ 50, 0 < M ≤ 100. 3. The length of each word is less than 11 and bigger than 0. 4. 1 ≤ Vi ≤ 100. 5. All the words in the input are different. 6. All the words just consist of 'a' - 'z'. 输出 For each test case, output the string which has the maximal weight in a single line.If there are multiple answers, output the shortest one. If there are still multiple answers, output the smallest one in lexicographical order. The answer may be an empty string.
时间: 2024-02-14 14:14:25 浏览: 26
这道题需要使用动态规划来解决。我们可以定义dp[i]表示长度为i的字符串的最大权值,它可以通过枚举最后一个单词得到。具体地,我们枚举最后一个单词为Wi,那么dp[i]就可以由dp[i-len(Wi)] + Vi得到,其中len(Wi)表示单词Wi的长度,Vi表示单词Wi的权值。最后我们在dp数组中找到最大权值的位置,然后倒推出字符串即可。
代码如下:
相关问题
java.lang.AssertionError: Expected test to throw (an instance of android.os.RemoteException and exception with message a string containing "RemoteException")
这个错误通常出现在JUnit测试中,表示测试没有抛出预期的异常。在本例中,测试期望抛出一个android.os.RemoteException,并且异常消息中包含"RemoteException"字符串。
如果您遇到这个错误,可以尝试以下方法来解决问题:
1. 确保您的测试代码中包含了期望抛出异常的代码,并且异常确实被抛出了。如果您的代码没有抛出期望的异常,那么测试就会失败。
2. 确保您的测试代码中使用了正确的异常类型和异常消息。如果您期望抛出android.os.RemoteException,并且异常消息中包含"RemoteException"字符串,那么您的测试代码应该类似于下面的代码:
```java
@Test(expected = RemoteException.class)
public void testSomeMethod() throws RemoteException {
// Some code that throws a RemoteException...
throw new RemoteException("RemoteException occurred.");
}
```
在这个示例代码中,我们使用`@Test(expected = RemoteException.class)`注解来告诉JUnit测试我们期望抛出一个RemoteException异常。然后,我们在测试方法中抛出了一个带有异常消息的RemoteException异常。
3. 检查您的代码是否正确处理了异常。如果您的代码在抛出异常后没有正确处理它,那么测试就会失败。在这种情况下,您需要检查并修复代码中的错误。
总之,要解决这个错误,您需要仔细检查您的测试代码和被测试代码,确保它们正确处理异常,并使用正确的异常类型和异常消息。
优化这段代码sentence = input("Please enter an English sentence: ")words = sentence.split()count = 0for word in words: if 'e' in word.lower(): count += 1print("The number of words containing 'E' or 'e' is:", count)
以下是优化后的代码:
sentence = input("Please enter an English sentence: ")
words = sentence.lower().split()
count = sum('e' in word for word in words)
print("The number of words containing 'E' or 'e' is:", count)
这个代码使用了一些技巧来提高效率。首先,我们将输入的句子转换为小写字母,这样我们就不需要在后面的循环中检查大小写了。其次,我们使用了一个生成器表达式来计算包含'e'的单词数量,这比使用一个循环和计数器更加简洁和高效。最后,我们使用了内置的sum函数来计算生成器表达式的总和。