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  1. Prepare
  2. Data Structures
  3. Stacks
  4. Simple Text Editor
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Simple Text Editor

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  • yoav0gal
     + 0 comments

    typescript boilerplate: 'use strict';

    process.stdin.resume(); process.stdin.setEncoding('utf-8'); let inputString: string = ''; let inputLines: string[] = []; let currentLine: number = 0; process.stdin.on('data', function(inputStdin: string): void { inputString += inputStdin; });

    process.stdin.on('end', function(): void { inputLines = inputString.split('\n'); inputString = ''; main(); });

    function readLine(): string { return inputLines[currentLine++]; }

    class TextEditor { private currentText:string; // Enter your code here constructor(){ this.currentText ="" } append(w:string){ // Enter your code here } delete(k:number){ // Enter your code here } print(k:number){ // Enter your code here } undo(){ // Enter your code here } }

    type EditorMethod = "append" | "delete" | "print" | "undo";

    function main() { const commandMap = {"1": "append", "2": "delete", "3" : "print", "4": "undo" } as const;

    const textEditor = new TextEditor();
inputLines.shift()
inputLines.map((inputLine:string) => {
    const [command, input] = inputLine.split(" ") as ["1"|"2"|"3"|"4", string]
    const method = commandMap[command] 
    if (method == "undo") return textEditor.undo()
    if (method == "append") return textEditor.append(input);

    return textEditor[method](Number(input))
} );

    }

  • 2k23csaiml231353
     + 0 comments

    include

    int main(){ //rudransh op in the chat //mohammad kaif topi in the chat return 0; }

  • 2k23_cs2312688
     + 0 comments
    #include <string>
#include <iostream>
#include <algorithm>
#include <stack>
using namespace std;


int main() {
    
    string s = "";
    stack<string> stack;
    stack.push(s);
    int n;
    cin >> n;
    
    for (int i=0; i<=n; i++)
    {
        string op;
        getline(cin, op);
        
        if (op[0] == '1')
        {
            // append
            s.append(op.substr(2, op.length() - 2));
            stack.push(s);
        }
        else if (op[0] == '2')
        {
            // delete
            s = s.substr(0, s.length() - stoi(op.substr(2, op.length() - 2)));
            stack.push(s);
        }
        else if (op[0] == '3')
        {
            // print
            cout << s[stoi(op.substr(2, op.length() - 2)) - 1] << endl;
        }
        else if (op[0] == '4')
        {
            // undo
            stack.pop();
            s = stack.top();
        }
    }
    //the adarsh 1m <- youtube
    return 0;
}

  • 2k23_cscys231212
     + 0 comments
    #include <string>
#include <iostream>
#include <algorithm>
#include <stack>
using namespace std;


int main() {
    
    string s = "";
    stack<string> stack;
    stack.push(s);
    int n;
    cin >> n;
    
    for (int i=0; i<=n; i++)
    {
        string op;
        getline(cin, op);
        
        if (op[0] == '1')
        {
            // append
            s.append(op.substr(2, op.length() - 2));
            stack.push(s);
        }
        else if (op[0] == '2')
        {
            // delete
            s = s.substr(0, s.length() - stoi(op.substr(2, op.length() - 2)));
            stack.push(s);
        }
        else if (op[0] == '3')
        {
            // print
            cout << s[stoi(op.substr(2, op.length() - 2)) - 1] << endl;
        }
        else if (op[0] == '4')
        {
            // undo
            stack.pop();
            s = stack.top();
        }
    }
    
    return 0;
}

  • phongthuypts
     + 0 comments

    Isn't the expected output of the sample test case wrong?

    Input (stdin): 1 abc, 3 3, 2 3, 1 xy, 3 2, 3 1

    The data contents should be: 1 abc => abc 3 3 => print c 2 3 => deleted abc 1 xy => xy 3 2 => print y 3 1 => print x (not a)