Problems # Name A Inna and Choose Options standard input/output 1 s, 256 MB x1942 B Inna and New Matrix of Candies standard input/output 1 s, 256 MB x1556 C Inna and Huge Candy Matrix standard input/output 2 s, 256 MB x1114 D Dima and Bact
Problems
# | Name | ||
---|---|---|---|
A |
Inna and Choose Options
standard input/output 1 s, 256 MB |
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B |
Inna and New Matrix of Candies
standard input/output 1 s, 256 MB |
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C |
Inna and Huge Candy Matrix
standard input/output 2 s, 256 MB |
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D |
Dima and Bacteria
standard input/output 2 s, 256 MB |
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E |
Inna and Binary Logic
standard input/output 3 s, 256 MB |
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A题:直接暴力枚举每种情况即可。水题
B题:记录下S,G的距离,每种距离只要一次,开个vis数组标记,最后遍历一遍看又几个即可
C题:模拟旋转即可。
D题:并查集+floyd,把w=0的边的点并查集处理,判断同种类是否都在一个集合内,不是就No,剩下的就利用floyd求出最短路即可。
E题:位运算,每个数字对应的每个位向左和向右延生,这个区间内向下的那个三角形区间一定是会增加(1
代码:
A题:
#include <stdio.h> #include <string.h> int t, n; char str[15]; char save[15][15]; bool judge(int a, int b) { int i, j; for (i = 0; i <br> B题: <pre class="brush:php;toolbar:false">#include <stdio.h> #include <string.h> #include <algorithm> using namespace std; const int N = 1005; int n, m, i, j, vis[N]; char g[N][N]; int main() { scanf("%d%d", &n, &m); for (i = 0; i <br> C题: <pre class="brush:php;toolbar:false">#include <stdio.h> #include <string.h> #include <algorithm> using namespace std; int n, m, x, y, z, p, i, j; struct Point { int x, y; } po[100005]; void at(Point &a) { int x = a.x, y = a.y; a.y = n - x + 1; a.x = y; } void ht(Point &a) { int x = a.x, y = a.y; a.y = m - y + 1; a.x = x; } void ct(Point &a) { int x = a.x, y = a.y; a.y = x; a.x = m - y + 1; } int main() { scanf("%d%d%d%d%d%d", &n, &m, &x, &y, &z, &p); x %= 4; y %= 2; z %= 4; for (i = 0; i <br> D题: <pre class="brush:php;toolbar:false">#include <stdio.h> #include <string.h> #include <vector> #define INF 0x3f3f3f3f #define min(a,b) ((a) w) { f[type[u]][type[v]] = w; f[type[v]][type[u]] = w; } if (w == 0) { int pu = find(u); int pv = find(v); if (pu != pv) fa[pv] = pu; } } for (i = 2; i <br> E题: <pre class="brush:php;toolbar:false">#include <stdio.h> #include <string.h> const int N = 100005; const int M = 20; int n, m, i, j, b; int a[N][M]; __int64 sum, mi[32]; int main() { mi[0] = 1; for (i = 1; i <br> <br> </string.h></stdio.h>

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.

MySQL is suitable for beginners because: 1) easy to install and configure, 2) rich learning resources, 3) intuitive SQL syntax, 4) powerful tool support. Nevertheless, beginners need to overcome challenges such as database design, query optimization, security management, and data backup.

Yes,SQLisaprogramminglanguagespecializedfordatamanagement.1)It'sdeclarative,focusingonwhattoachieveratherthanhow.2)SQLisessentialforquerying,inserting,updating,anddeletingdatainrelationaldatabases.3)Whileuser-friendly,itrequiresoptimizationtoavoidper

ACID attributes include atomicity, consistency, isolation and durability, and are the cornerstone of database design. 1. Atomicity ensures that the transaction is either completely successful or completely failed. 2. Consistency ensures that the database remains consistent before and after a transaction. 3. Isolation ensures that transactions do not interfere with each other. 4. Persistence ensures that data is permanently saved after transaction submission.

MySQL is not only a database management system (DBMS) but also closely related to programming languages. 1) As a DBMS, MySQL is used to store, organize and retrieve data, and optimizing indexes can improve query performance. 2) Combining SQL with programming languages, embedded in Python, using ORM tools such as SQLAlchemy can simplify operations. 3) Performance optimization includes indexing, querying, caching, library and table division and transaction management.

MySQL uses SQL commands to manage data. 1. Basic commands include SELECT, INSERT, UPDATE and DELETE. 2. Advanced usage involves JOIN, subquery and aggregate functions. 3. Common errors include syntax, logic and performance issues. 4. Optimization tips include using indexes, avoiding SELECT* and using LIMIT.


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