My issue was in EPS. When I changed it from 1e-5 to 1e-8 I got AC. Good luck!

I think this is very easy for 319 points of hardness, you only need to find cycle in directed graph

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(){
    char encrypted[100],desencriptado;
    int largo, resta;
    scanf("%s",encrypted);
    largo=strlen(encrypted);
    for(int j=0;j<largo;j++){
        encrypted[j]-= 97;
    }
    encrypted[0]+=26;
    for(int i=1;i<largo;i++){
        while(encrypted[i]<encrypted[i-1]){
            encrypted[i]+=26;
        }
    }
    resta=5;
    for(int n=0;n<largo;n++){
        desencriptado=((encrypted[n]-resta)%26)+97;
        printf("%c", desencriptado);
        resta=encrypted[n];
    }


    return 0;
}

I keep getting WA8 but I don't have any test cases that may go wrong. Please help.

4 3
0 0 10
0 0
0
--
10
1 2 3

My solution is O(n^3T),and how to solve it faster?

Answer is a - b - c or a - b * c

using System;
using System.Collections.Generic;
namespace Order {
    class Banknotes {
        public long value = 0;
        public int count = 0;
        public Banknotes(long value) {
            this.value = value;
        }
    }

    class Program {
        public static Banknotes FindMaxValue (List<Banknotes> list) {
            int _maxValue = list[0].count;
            Banknotes _maxBanknote = list[0];
            for (int index = 1; index < list.Count; index++) {
                if (list[index].count > _maxValue) {
                    _maxBanknote = list[index];
                    _maxValue = list[index].count;
                }
            }

            return _maxBanknote;
        }

        public static void Main (string[] args) {
            List<Banknotes> banknotes = new List<Banknotes>();
            int length = Convert.ToInt32(Console.ReadLine());
            if (length == 0) return;

            banknotes.Add(new Banknotes(Convert.ToInt64(Console.ReadLine())));
            banknotes[0].count = 1;
            for (int iterable = 1; iterable < length; iterable++) {
                long number = Convert.ToInt64(Console.ReadLine());
                for (int jterable = 0; jterable < banknotes.Count; jterable++) {
                    // Console.WriteLine($"{number} is {numbers[jterable].value}?");
                    if (number == banknotes[jterable].value) {
                        banknotes[jterable].count++;
                        // Console.WriteLine("yes");
                        break;
                    } else if (jterable + 1 == banknotes.Count) {
                      // Console.WriteLine("no");
                        banknotes.Add(new Banknotes(number));
                    }
                }
            }

            Console.WriteLine(FindMaxValue(banknotes).value);
        }
    }
}

pls give me some tests,i don't know,what's wrong with my code
#include<iostream>


#define  endl '\n'
#define ll long long
# define ld long double
using namespace std;

ll d[1100][1100];
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
#ifdef LOCAL
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
#endif // LOCALfr

int n,m;


            for (int i=1;i<=1000;i++) {
    for (int j=1;j<=1000;j++) {
        d[i][j] = d[i][j-1] + d[i - 1][j - 1] + 1;
    }
            }
n=1;m=1;
while (n && m) {
    cin>>n>>m;
    if (n &&m) {
        int l=1,r=m+1000,mi;
        while (l<r) {
            mi=(l+r)/2;
            if (d[n][mi]>=m) {
                r=mi;
            }
            else l=mi+1;
        }
        cout<<l<<endl;
    }
}
    return 0;
}

Edited by author 03.11.2021 00:01

Edited by author 03.11.2021 00:01

Edited by author 03.11.2021 00:01

Here are some tests that helped me figure out what was wrong with my program:

316496
out => 317559 317560

318533
out => 318659 318660

945999
out => 950509 950510

055099
out => 055109 055110

00510059
out => 00504999 00505000

00450010
out => 00460019 00460020

00504010
out => 00504999 00505000

0019
out => 4509 4510

00510059
out => 00510059 00510060

945999
out => 950509 950510

008359
out => 009449 009450

3000
out => 4509 4510

4509
out => 4509 4510

4099
out => 4509 4510

9999
out => No solution

373730020389
out => 373730021389 373730021390

373730030290
out => 373730031289 373730031290

373730030289
out => 373730031289 373730031290

Good luck!

1) Input text
2) Compare each character with:
    letter
    punctuation
3) Output with changes

using System;
using System.Collections.Generic;
namespace AntiCAPS {
    public class Program {
        public static void Main(string[] args) {
            bool _newSentence = true;
            string message = Console.In.ReadToEnd().ToLower();
            List<char> punctuation = new List<char>(new char[] { '!', '.', '?' });
            for (int iterable = 0; iterable < message.Length; iterable++) {
                if ((int)message[iterable] >= 97 && (int)message[iterable] <= 122) {
                    if (_newSentence) {
                        Console.Write(Char.ToUpper(message[iterable]));
                        _newSentence = false;
                    } else Console.Write(message[iterable]);
                } else if (punctuation.Contains(message[iterable])) {
                    _newSentence = true;
                    Console.Write(message[iterable]);
                } else Console.Write(message[iterable]);
            }
        }
    }
}

Edited by author 02.11.2021 00:10

N = input().split()

res = int(N[0]) * int(N[1]) * int(N[2]) * 2


NVM... forgot to use print

Edited by author 01.11.2021 23:13

Try this
4
a b c
a p d
b e w
b t y

ans:2

/


Edited by author 01.11.2021 14:38

This is an example of how you shouldn't make the problem

using System;
namespace EasyHack_ {
    class Coder {
        private short[] unicode;
        private string word;
        public static readonly string alphabet = "abcdefghijklmnopqrstuvwxyz";
        public string GetCoderWord() {
            this.UnicodeToCoder();
            this.SetUnicode();
            return this.word;
        }

        public string GetOutCoderWord() {
            this.UnicodeOutCoder();
            this.SetUnicode();
            return this.word;
        }

        public Coder(string word) {
            this.word = word.ToLower();
            this.unicode = new short[word.Length];
            this.GetUnicode();
        }

        public string GetWord () {
            return this.word;
        }

        public short[] GetWordUnicode () {
            return this.unicode;
        }

        private void GetUnicode () {
            for (int iterable = 0; iterable < unicode.Length; iterable++) {
                this.unicode[iterable] = (short)Coder.alphabet.IndexOf(this.word[iterable]);
            }
        }

        private void SetUnicode () {
            this.word = "";
            for (int iterable = 0; iterable < unicode.Length; iterable++) {
                this.word += Coder.alphabet[unicode[iterable]];
            }
        }

        private void UnicodeToCoder () {
            if (unicode[0] == 21) unicode[0] = 0;
            else this.unicode[0] = (this.unicode[0] + 5 > 25) ?
                (short)(this.unicode[0] + 5 - 25) :
                (short)(this.unicode[0] + 5);
            for (int iterable = 1; iterable < this.unicode.Length; iterable++) {
                this.unicode[iterable] = (this.unicode[iterable] + this.unicode[iterable - 1] > 25) ?
                    (short)((this.unicode[iterable] + this.unicode[iterable - 1]) % 26) :
                    (short)(this.unicode[iterable] + this.unicode[iterable - 1]);
            }
        }

        private void UnicodeOutCoder () {
            for (int iterable = 1; iterable < this.unicode.Length; iterable++) {
                while (this.unicode[iterable] < this.unicode[iterable - 1]) this.unicode[iterable] += 26;
            }

            short _lastUnicode = this.unicode[0];
            if (this.unicode[0] == 0) this.unicode[0] = 21;
            else this.unicode[0] = (this.unicode[0] - 5 < 0) ?
                (short)(25 + this.unicode[0] - 5) :
                (short)(this.unicode[0] - 5);
            for (int iterable = 0; iterable < this.unicode.Length - 1; iterable++) {
                short element = this.unicode[iterable + 1];
                this.unicode[iterable + 1] -= _lastUnicode;
                _lastUnicode = element;
            }
        }
    }

    class Program {
        public static void Main(string[] args) {
            string coderWord = Console.ReadLine();
            Coder word = new Coder(coderWord);
            Console.WriteLine(word.GetOutCoderWord());
        }
    }
}

Edited by author 31.10.2021 14:59

Edited by author 31.10.2021 15:11

in this test the footspeed is lower than one.
sorry for my poor english.

GOOD LUCK!!!