Problem:
Score : 100 points

Problem Statement

Takahashi is meeting up with Aoki.

They have planned to meet at a place that is D meters away from Takahashi's house in T minutes from now.

Takahashi will leave his house now and go straight to the place at a speed of S meters per minute.

Will he arrive in time?

Constraints

1 \leq D \leq 10000

1 \leq T \leq 10000

1 \leq S \leq 10000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

D T S

Output

If Takahashi will reach the place in time, print Yes; otherwise, print No.

Sample Input 1

1000 15 80

Sample Output 1

Yes

It takes 12.5 minutes to go 1000 meters to the place at a speed of 80 meters per minute. They have planned to meet in 15 minutes so he will arrive in time.

Sample Input 2

2000 20 100

Sample Output 2

Yes

It takes 20 minutes to go 2000 meters to the place at a speed of 100 meters per minute. They have planned to meet in 20 minutes so he will arrive just on time.

Sample Input 3

10000 1 1

Sample Output 3

No

He will be late.

Solution in C# (.NET Core 3.1.201) (judge verdict: Runtime Error)

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;

namespace contest_Csharp
{

    class Program
    {
        public static (long m, long s)[,] dp;
        public static long mod;
        
        public static List<int> getprimes(int n)
        {
            var result = new List<int>();
            result.Add(2);
            int i = 3;
            while (result.Last() <= n)
            {
                var flg = true;
                foreach(var p in result)
                {
                    if (i % p == 0)
                    {
                        flg = false;
                    } 
                }
                if (flg)
                    result.Add(i);
                i = i + 2;
            }
            return result;
        }
        static void Main(string[] args)
        {
            checked
            {
                var sw = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
                Console.SetOut(sw);

                var vals = Console.ReadLine().Split(' ').
                    Select(x => int.Parse(x)).ToList();


                var N = vals[0];
                //var M = vals[1];
                //var S = vals[2];
                var A = Console.ReadLine().Split(' ').
                    Select(x => int.Parse(x)).ToList();

                var ans = "";


                var primes = getprimes(1000);
                var usedprime = new bool[1050];

                var pairflg = true;
                A.Sort();
                var nokori = new List<int>();

                
                for (int i = 0; i < N; i++)
                {
                    var num = A[i];
                    foreach(var p in primes)
                    {
                        
                        while (num % p == 0)
                        {
                            if (usedprime[p] && num==A[i])
                            {
                                pairflg = false;
                                
                            }
                            else
                                usedprime[p] = true;
                            num /= p;
                        }
                    }
                    if (num > 1)
                    {
                        nokori.Add(num);
                    }
                }
                nokori.Sort();
                for (int i = 1; i < nokori.Count(); i++)
                {
                    if (nokori[i] == nokori[i - 1])
                        pairflg = false;
                }
                if (pairflg)
                {
                    ans = "pairwise coprime";
                }
                else
                {
                    
                    var G = A[0];
                    for (int i = 1; i < N; i++)
                    {
                        G = (int)gcd(G, A[i]);
                    }
                    ans = (G == 1) ? "setwise coprime" : "not coprime";
                }
                

                
                
                Console.WriteLine(ans);

                Console.Out.Flush();
            }//cheked




        }
        static long gcd(long a, long b)
        {
            long large = Math.Max(a, b);
            long small = Math.Min(a, b);
            while (large % small != 0)
            {
                var S = small;
                small = large % small;
                large = S;
            }
            return small;
        }
    }

}