kencoba

AWSTemplateFormatVersion: '2010-09-09'
Description: CloudFormation template to create an IAM Role and Instance Profile for EC2 to connect with AWS Systems Manager (Session Manager).

Parameters:
  RoleName:
    Type: String
    Description: Name of the IAM Role for SSM Session Manager.
    Default: SSMRoleForEC2  # You can change the default value or provide it during stack creation

  InstanceProfileName:

kencoba

AWSTemplateFormatVersion: '2010-09-09'
Description: CloudFormation template to launch an EC2 instance with User Data, using Instance Profile for SSM Session Manager access.

Parameters:
  Prefix:
    Type: String
    Default: MyApp
    Description: Prefix for all resource names

  InstanceType:

kencoba

AWSTemplateFormatVersion: '2010-09-09'
Description: CloudFormation template to create a Security Group allowing inbound traffic on port 3306 for MariaDB.

Parameters:
  VpcId:
    Type: AWS::EC2::VPC::Id
    Description: VPC ID to create the security group in.
  Prefix:
    Type: String
    Default: MyApp

kencoba

AWSTemplateFormatVersion: '2010-09-09'
Description: CloudFormation template to create a VPC with one public subnet and one private subnet, with customizable CIDR blocks and a common prefix for all resource names.

Parameters:
  VpcCidr:
    Type: String
    Default: 10.0.0.0/16
    Description: CIDR block for the VPC
  PublicSubnetCidr:
    Type: String

kencoba

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

/**
 * 
 * Cover all patterns of transactions.
 * 
 * @author kencoba

kencoba

(* 新妻弘，「演習　群・環・体　入門」，共立出版株式会社 より *)
Require Import ZArith.
Open Scope Z_scope.

Theorem thm_1_1 : forall a b c : Z , a + b = a + c -> b = c.
Proof.
  intros a b c H.
  apply Z.add_cancel_l with (p := a).
  assumption.
Qed.

kencoba

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

kencoba

class Request
end

class Read < Request
  attr_reader :var

  def initialize(var)
    @var = var
  end

kencoba

class Request:
    pass


class Read(Request):
    def __init__(self, var):
        self.var = var


class Write(Request):

kencoba

fn main() {
    println!("{n}P{r} = {x}", n = 5, r = 2, x = permutation(5, 2));
    println!("{n}C{r} = {x}", n = 5, r = 2, x = combination(5, 2));
}

pub fn permutation(n: i64, r: i64) -> i64 {
    let mut result = 1;
    for i in (n - r + 1)..=n {
        result *= i;
    }