Problem:
Score : 100 points

Problem Statement

You are given three integers A, B and C.

Determine if there exists an equilateral triangle whose sides have lengths A, B and C.

Constraints

All values in input are integers.

1 \leq A,B,C \leq 100

Input

Input is given from Standard Input in the following format:

A B C

Output

If there exists an equilateral triangle whose sides have lengths A, B and C, print Yes; otherwise, print No.

Sample Input 1

2 2 2

Sample Output 1

Yes

There exists an equilateral triangle whose sides have lengths 2, 2 and 2.

Sample Input 2

3 4 5

Sample Output 2

No

There is no equilateral triangle whose sides have lengths 3, 4 and 5.

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <math.h>
 
int main(){
 
  /* 三角形の辺 */
  int a, b, c;
 
  /* 辺の長さを入力 */
  scanf("%d %d %d",&a,&b,&c);
 
  /* 三角形の種類を判別・出力 */
  if ((a + b > c && a + c > b && b + c > a)&& (a > 0 && b > 0 && c > 0)&&(a == b && b == c)) 
  {
  	printf("Yes");
  }
  
  else 
  {
    printf("No");
  }
   return 0;
}