PAT甲级:1124 Raffle for Weibo Followers (20分) 题干 John got a full mark on PAT. He was so happy that he decided to hold a raffle(抽奖) for his followers on Weibo -- that is, he would select winners from every N followers who forwarded his post, and give aw…

题目链接 https://www.patest.cn/contests/pat-a-practise/1116 思路 注意一个细节 如果没有本来 ID 的 后来又查了这个ID 不是输出 checked 而是 Are you kidding? AC代码 #include <cstdio> #include <cstring> #include <ctype.h> #include <cstdlib> #include <cmath> #includ…

1069 The Black Hole of Numbers (20 分)   For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in non-increasing order first, and then in non-decreasing order, a new number can be obtained by taking the seco…

1065 A+B and C (64bit) (20 分)   Given three integers A, B and C in [−], you are supposed to tell whether A+B>C. Input Specification: The first line of the input gives the positive number of test cases, T (≤). Then T test cases follow, each consists o…

题意:输入一个正整数N(<=1e5),接着输入N个小于等于1.0的正数,输出N个数中所有序列的和. AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; ]; int main(){ //ios::sync_with_stdio(false); //cin.tie(NULL); //cout.tie(NULL); int n; scanf("%d&…

题意: 输入两组,每组三个非负整数A,B,C(A<=1e7,B<17,C<29),输出相加的和.(类似个位上29进制,十位上17进制运算) AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; int main(){ ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); int a…

题意: 输入一个字符串长度为5~80,以'U'型输出,使得底端一行字符数量不小于侧面一列,左右两列长度相等. trick: 不把输出的数组全部赋值为空格为全部答案错误,可能不赋值数组里值为0,赋值后是' ',空格的ascii是32,初读题面时并没有看到要输出空格,因为打印0其实效果看起来好像一样... AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; stri…

题意: 输入一个不超过20位的正整数,问乘2以后是否和之前的数组排列相同(数字种类和出现的个数不变),输出Yes或No,并输出乘2后的数字. AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; ]; string s; ]; int main(){ cin>>s; int len=s.size(); ;i>=;--i) ++vis[s[i]-'…

PAT甲级:1066 Root of AVL Tree (25分) 题干 An AVL tree is a self-balancing binary search tree. In an AVL tree, the heights of the two child subtrees of any node differ by at most one; if at any time they differ by more than one, rebalancing is done to rest…

PAT甲级:1064 Complete Binary Search Tree (30分) 题干 A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtre…

PAT (Advanced Level) Practice 1027 Colors in Mars (20 分) 凌宸1642 题目描述: People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, where the first 2 digits are for R…

PAT (Advanced Level) Practice 1019 General Palindromic Number (20 分) 凌宸1642 题目描述: A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic number. All single digit…

PAT (Advanced Level) Practice 1011 World Cup Betting (20 分) 凌宸1642 题目描述: With the 2010 FIFA World Cup running, football fans the world over were becoming increasingly excited as the best players from the best teams doing battles for the World Cup tro…

PAT (Advanced Level) Practice 1005 Spell It Right (20 分) 凌宸1642 题目描述: Given a non-negative integer N, your task is to compute the sum of all the digits of N, and output every digit of the sum in English. 译:给出一个非负整数 N , 你的任务是计算出 N 的每位数的和,并且用英语输出和的每一位数…

PAT (Advanced Level) Practice 1001 A+B Format (20 分) 凌宸1642 题目描述: Calculate a+b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less than four digits). 译:计算 a + b 的和,并格式化…

PAT乙级:1087 有多少不同的值 (20分) 当自然数 n 依次取 1.2.3.--.N 时,算式 ⌊n/2⌋+⌊n/3⌋+⌊n/5⌋ 有多少个不同的值?(注:⌊x⌋ 为取整函数,表示不超过 x 的最大自然数,即 x 的整数部分.) 输入格式: 输入给出一个正整数 N(2≤N≤104). 输出格式: 在一行中输出题面中算式取到的不同值的个数. 输入样例: 2017 输出样例: 1480 思路 从2开始,只要对2,3,5相除,存在一个是整除,说明该数字不同 柳婼大神提供了一个set写法,也能用…

题意: 输入一个正整数N(<=10000),接着依次输入N个学生的ID.输入一个正整数Q,接着询问Q次,每次输入一个学生的ID,如果这个学生的ID不出现在之前的排行榜上输出Are you kidding,否则如果已经询问过输出Checked,否则如果这位学生排名第一输出Mystery Award,否则如果这位学生的排名是质数输出Minion,否则输出Chocolate. AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/…

1002 A+B for Polynomials (25 分) This time, you are supposed to find A+B where A and B are two polynomials. Input Specification: Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a polynomial…

1023 Have Fun with Numbers(20 分) Notice that the number 123456789 is a 9-digit number consisting exactly the numbers from 1 to 9, with no duplication. Double it we will obtain 246913578, which happens to be another 9-digit number consisting exactly t…

1009 Product of Polynomials (25)(25 分) This time, you are supposed to find A*B where A and B are two polynomials. Input Specification: Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a pol…

1007 Maximum Subsequence Sum (25)(25 分) Given a sequence of K integers { N~1~, N~2~, ..., N~K~ }. A continuous subsequence is defined to be { N~i~, N~i+1~, ..., N~j~ } where 1 <= i <= j <= K. The Maximum Subsequence is the continuous subsequence…

1065. A+B and C (64bit) (20) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 HOU, Qiming Given three integers A, B and C in [-263, 263], you are supposed to tell whether A+B > C. Input Specification: The first line of the input gives the po…

题目链接 https://www.patest.cn/contests/pat-a-practise/1065 思路 因为 a 和 b 都是 在 long long 范围内的 但是 a + b 可能会溢出 long long 但是 不会溢出 long double 所以 用long double 就能轻松解决了 或者 用大数加法 也行 AC代码 #include <cstdio> #include <cstring> #include <ctype.h> #includ…

1079 Total Sales of Supply Chain (25 分)   A supply chain is a network of retailers(零售商), distributors(经销商), and suppliers(供应商)-- everyone involved in moving a product from supplier to customer. Starting from one root supplier, everyone on the chain b…

1067 Sort with Swap(0, i) (25 分)   Given any permutation of the numbers {0, 1, 2,..., N−1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For example, to sort {4, 0, 2, 1, 3} we may…

Consider a positive integer N written in standard notation with k+1 digits a​i​​ as a​k​​⋯a​1​​a​0​​ with 0 for all i and a​k​​>0. Then N is palindromic if and only if a​i​​=a​k−i​​ for all i. Zero is written 0 and is also palindromic by definition.…

题意: 输入一个正整数N(<=10),接着输入0~N-1每个结点的左右儿子结点,输出这颗二叉树的反转的层次遍历和中序遍历. AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; ][]; ]; void bfs(int r){ queue<int>q; q.push(r); cout<<r; while(!q.empty()){ in…

题意: 输入一个正整数N(<=100),接着输入两行N个数,表示原数组和经过一定次数排序后的数组.判断是经过插入排序还是堆排序并输出再次经过该排序后的数组(数据保证答案唯一). AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; ],b[]; ][]; int main(){ ios::sync_with_stdio(false); cin.tie(NUL…

题意: 输入一个九位整数,输出它的汉字读法(用拼音表示). trick: 字符串数组""其实会输出一个空格,而不是什么都不输出,导致测试点0和4格式错误. AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; ]; ]={"","yi","er","san",&qu…

题意: 输入一个正整数N(<=20),接着输入N个结点的值,依次插入一颗AVL树,输出最终根结点的值. AAAAAccepted code: #define HAVE_STRUCT_TIMESPEC #include<bits/stdc++.h> using namespace std; ]; typedef struct node{ int val; node*left,*right; }; node*left_rotate(node*root){ node*tamp=root->…