用c语言和贪心算法解决这个问题:描述 Given an integer V representing the total amount of money you need to change, supposing you have an infinite supply of { 1, 2, 5, 10, 20, 50, 100} valued coins, what is the minimum number of coins needed to make the change? 输入 The first line includes an integer T (T<50), the number of test cases. Every test case is an integer V (1<=V<=100000). 输出 For each test case, output the minimum number of coins that you need to make the change.

时间: 2024-02-20 20:57:22 浏览: 20
好的,这是一个很典型的贪心算法问题。我们可以按照从大到小的顺序依次选择硬币,直到总金额达到所需的金额。以下是代码实现: ```c #include<stdio.h> int main(){ int T, V, coins[7] = {100, 50, 20, 10, 5, 2, 1}; scanf("%d", &T); while(T--){ scanf("%d", &V); int ans = 0; for(int i = 0; i < 7; i++){ while(V >= coins[i]){ V -= coins[i]; ans++; } } printf("%d\n", ans); } return 0; } ``` 首先输入测试用例的数量 T,然后依次输入每个测试用例中所需的金额 V。接着用一个数组 coins 存储硬币的面值,按照从大到小的顺序排列。接下来,我们用一个循环依次选择硬币,直到总金额达到所需的金额。最后输出所需的硬币数量即可。
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描述 Given an integer V representing the total amount of money you need to change, supposing you have an infinite supply of { 1, 2, 5, 10, 20, 50, 100} valued coins, what is the minimum number of coins needed to make the change? 输入 The first line includes an integer T (T<50), the number of test cases. Every test case is an integer V (1<=V<=100000). 输出 For each test case, output the minimum number of coins that you need to make the change.

这是一个典型的动态规划问题。我们可以定义一个长度为 V+1 的数组 dp,其中 dp[i] 表示凑出 i 元所需的最小硬币数。对于每一个硬币面值,我们可以枚举它凑出的所有金额,从而更新 dp 数组。具体实现如下: ```python coin_values = [1, 2, 5, 10, 20, 50, 100] max_value = max(coin_values) dp = [float('inf')] * (max_value + 1) dp[0] = 0 # 预处理出所有可能的金额 for i in range(1, max_value + 1): for coin in coin_values: if i >= coin: dp[i] = min(dp[i], dp[i - coin] + 1) # 处理每个测试用例 t = int(input()) for _ in range(t): v = int(input()) ans = 0 for i in range(0, v + 1, max_value): # 对于每个区间,使用预处理出的 dp 数组求解最小硬币数 ans += dp[min(v - i, max_value)] print(ans) ``` 代码中的 dp 数组预处理出了所有可能的金额,最大值为 coin_values 中最大的硬币面值。在处理每个测试用例时,我们将金额拆分成若干个区间,每个区间长度为 max_value,使用预处理出的 dp 数组求解区间内的最小硬币数,最后将所有区间内的硬币数相加即可得到答案。

用c语言和贪心算法解决这个问题:描述 Given N TV programs with each having a begin time and an end time, compute how many TV programs you can watch at most. 输入 There are multiple test cases. The first line of each test case contains an integer N (1<=N<=1000), the number of TV programs. Then N lines follow, with every line containing two integers Bi and Ei (1<=Bi<Ei<=INT_MAX), representing the begin time and end time of TV program i. The inputs terminate at the end of the file (EOF). 输出 For each test case, output a line containing an integer which is the number of TV programs that you can watch at most.

好的,我会为您解答这个问题。首先,这是一个经典的贪心算法问题,我们可以按照结束时间从早到晚对所有电视节目进行排序,然后依次选择结束时间最早的电视节目,并将其结束时间作为下一个选择的起始时间,直到所有电视节目都被选择完。下面是用C语言实现的代码: ```c #include <stdio.h> #include <stdlib.h> typedef struct { int start; int end; } Program; int cmp(const void* a, const void* b) { Program* p1 = (Program*)a; Program* p2 = (Program*)b; return p1->end - p2->end; } int main() { int n; while (scanf("%d", &n) != EOF) { Program* programs = (Program*)malloc(n * sizeof(Program)); for (int i = 0; i < n; i++) { scanf("%d%d", &programs[i].start, &programs[i].end); } qsort(programs, n, sizeof(Program), cmp); int count = 0, end = 0; for (int i = 0; i < n; i++) { if (programs[i].start >= end) { count++; end = programs[i].end; } } printf("%d\n", count); free(programs); } return 0; } ``` 代码中,我们定义了一个结构体 `Program` 来存储每个电视节目的开始时间和结束时间。`cmp` 函数是用来比较两个电视节目的结束时间的,用于 `qsort` 排序。在 `main` 函数中,我们使用 `scanf` 读入每个测试用例,然后按照结束时间从早到晚对所有电视节目进行排序。接下来,我们使用 `count` 记录可以观看的电视节目数量,`end` 记录上一个观看的电视节目的结束时间。然后遍历所有电视节目,如果当前电视节目的开始时间大于等于 `end`,则选择该电视节目,并更新 `count` 和 `end`。最后输出 `count` 即可。 希望我的回答对您有帮助!

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Also create a ControllerCreate class that extends Controller.The create method takes as arguments the name of a new library user, a number of books (as a string), and an integer representing the role of user to create (where the integer 0 means a lender and the integer 1 means a borrower). The create method of the controller then transforms the book number from a string to an integer (using the Integer.parseInt static method), creates an object from the correct class (based on the role specified by the user input: lender or borrower) and calls the addUser method of the library to add the new user object to the library. • If no exception occurs then the create method of the controller returns the empty string. • If the constructor of the Borrower class throws a NotALenderException then the create method of the controller must catch this exception and return as result the error message from the exception object. • If the parseInt method of the Integer class throws a NumberFormatException (because the user typed something which is not an integer) then the create method of the controller must catch this exception and return as result the error message from the exception object. Modify the run method of the GUI class to add a ViewCreate view that uses a ControllerCreate controller and the same model as before (not a new model!) Do not delete the previous views. Note: if at the end of Question 7 you had manually added to your library (model object) some users for testing, then you must now remove those users from the run method of the anonymous class inside the GUI class. You do not need these test users anymore because you have now a graphical user interface to create new users! Run your GUI and check that you can correctly use the new view to create different users for your library, with different types of roles. • Check that, when you create a new user, the simple view is automatically correctly updated to show the new total number of books borrowed by all users. • Also use the “get book” view to check that the users are correctly created with the correct names and correct number of books. • Also check that trying to create a borrower with a negative number of books correctly shows an error message. Also check that trying to create a user with a number of books which is not an integer correctly shows an error message (do not worry about the content of the error message). After you created a new user, you can also check whether it is a lender or a borrower using the “more book” view to increase the number of books of the user by a big negative number: • if the new user you created is a lender, then increasing the number of books by a big negative value will work and the number of books borrowed by the user will just become a larger value (you can then check that using the “get book” view); • if the new user you created is a borrower, then increasing the number of books by a big negative value will fail with an error message and the number of books borrowed by the user will not change (you can then check that using the “get book” view). 完成符合以上要求的java代码

Create a function pixel_flip(lst, orig_lst, budget, results, i=0) that uses recursion to generate all possible new unique images from the input orig_lst, following these rules: • The input lst is the current list being processed. Initially, this will be the same as orig_lst which is the original flattened image. • The input budget represents the number of pixels that can still be flipped. When the budget reaches 0, no more pixels can be flipped. • The input results is a list of resulting flattened images with flipped pixels. Initially, this will be an empty list. • The input i represents the index of the pixel being processed, by default set to 0, which is used to drive the recursive function towards its base case (i.e., initially starting from i=0). At termination of the function, the argument results should contain all possibilities of the input orig_lst by only flipping pixels from 0 to 1 under both the budget and the adjacency constraints. fill code at #TODO def pixel_flip(lst: list[int], orig_lst: list[int], budget: int, results: list, i: int = 0) -> None: """ Uses recursion to generate all possibilities of flipped arrays where a pixel was a 0 and there was an adjacent pixel with the value of 1. :param lst: 1D list of integers representing a flattened image . :param orig_lst: 1D list of integers representing the original flattened image. :param budget: Integer representing the number of pixels that can be flipped . :param results: List of 1D lists of integers representing all possibilities of flipped arrays, initially empty. :param i: Integer representing the index of the pixel in question. :return: None. """ #TODO def check_adjacent_for_one(flat_image: list[int], flat_pixel: int) -> bool: """ Checks if a pixel has an adjacent pixel with the value of 1. :param flat_image: 1D list of integers representing a flattened image . :param flat_pixel: Integer representing the index of the pixel in question. :return: Boolean. """ #TODO

Create a function pixel_flip(lst, orig_lst, budget, results, i=0) that uses recursion to generate all possible new unique images from the input orig_lst, following these rules: • The input lst is the current list being processed. Initially, this will be the same as orig_lst which is the original flattened image. • The input budget represents the number of pixels that can still be flipped. When the budget reaches 0, no more pixels can be flipped. • The input results is a list of resulting flattened images with flipped pixels. Initially, this will be an empty list. • The input i represents the index of the pixel being processed, by default set to 0, which is used to drive the recursive function towards its base case (i.e., initially starting from i=0). At termination of the function, the argument results should contain all possibilities of the input orig_lst by only flipping pixels from 0 to 1 under both the budget and the adjacency constraints. fill code at #TODO def pixel_flip(lst: list[int], orig_lst: list[int], budget: int, results: list, i: int = 0) -> None: """ Uses recursion to generate all possibilities of flipped arrays where a pixel was a 0 and there was an adjacent pixel with the value of 1. :param lst: 1D list of integers representing a flattened image . :param orig_lst: 1D list of integers representing the original flattened image. :param budget: Integer representing the number of pixels that can be flipped . :param results: List of 1D lists of integers representing all possibilities of flipped arrays, initially empty. :param i: Integer representing the index of the pixel in question. :return: None. """ #TODO

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