Problem:
Score : 100 points

Problem Statement

AtCoDeer the deer found two positive integers, a and b.
Determine whether the product of a and b is even or odd.

Constraints

1 ≤ a,b ≤ 10000

a and b are integers.

Input

Input is given from Standard Input in the following format:

a b

Output

If the product is odd, print Odd; if it is even, print Even.

Sample Input 1

3 4

Sample Output 1

Even

As 3 × 4 = 12 is even, print Even.

Sample Input 2

1 21

Sample Output 2

Odd

As 1 × 21 = 21 is odd, print Odd.

Solution in C (GCC 5.4.1) (judge verdict: Runtime Error)

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

int main(){
  char a[4];
  char b[4];
  char *c;
  int num;
  int d;
  scanf("%s",a);
  scanf("%s",b);
  c = strcat(a,b);
  num = atoi(c);

  d = (int)sqrt((double)num);
  if(d*d == num){
    printf("Yes");
  }else{
    printf("No");
  }
}