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++ (GCC 9.2.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
using namespace std;

long long MOD = 1e9+7;
int MAX_INT = 1e9;

long long H, W;
vector<vector<long long>> cost_map(1000+1, vector<long long>(1000+1, 0));

// 最大公約数
long long gcd(long long a, long long b){
  if(b == 0) return a;
  return gcd(b, a % b);
}
// 最小公倍数
long long lcm(long long a, long long b) {
  return a / gcd(a, b) * b;
}

int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);

  float D, T, S;
  cin >> D >> T >> S;

  cout << ((D / S <= T) ? "Yes" : "No") << endl;

  return 0;
}