Contents

**Codechef Chef and NextGen HELIUM3 Solution**

Chef is currently working for a secret research group called NEXTGEN. While the rest of the world is still in search of a way to utilize Helium-3 as a fuel, NEXTGEN scientists have been able to achieve 2 major milestones:

- Finding a way to make a nuclear reactor that will be able to utilize Helium-3 as a fuel
- Obtaining every bit of Helium-3 from the moon’s surface

Moving forward, the project requires some government funding for completion, which comes under one condition: to prove its worth, the project should power Chefland by generating at least A units of power each year for the next B years.

Help Chef determine whether the group will get funded assuming that the moon has X grams of Helium-3 and 1 gram of Helium-3 can provide Y units of power.

**Input Format**

- The first line of input contains an integer T, the number of testcases. The description of T test cases follows.
- Each test case consists of a single line of input, containing four space-separated integers A,B,X,Y respectively.

**Output Format**

For each test case print on a single line the answer `Yes`

if NEXTGEN satisfies the government’s minimum requirements for funding and `No`

otherwise.

You may print each character of the answer string in either uppercase or lowercase (for example, the strings `"yEs"`

, `"yes"`

, `"Yes"`

and `"YES"`

will all be treated as identical).

**Constraints**

- 1≤T≤1000
- 1≤A,B,X,Y,≤1000

**Subtasks**

**Subtask #1 (100 points):** Original constraints

**Sample Input 1**

```
4
1 2 3 4
4 3 2 1
2 18 9 4
1 100 2 49
```

**Sample Output 1**

```
Yes
No
Yes
No
```

**Explanation**

**Test case 1:**Chefland requires A=1 units of power for the next B=2 years. In total, the moon must be capable of providing A⋅B=2 units of power. There are in total X=3 grams of Helium-3 on the moon which is capable of providing X⋅Y=12 units of power. 12>2, so the project satisfies the minimum requirements for funding. Thus, the answer is`Yes`

.**Test case 2:**The total amount of power needed by Chefland is A⋅B=12, whereas the total that can be provided by the Helium-3 present on the moon is X⋅Y=2, which is insufficient to receive funding, so the answer is`No`

.**Test case 3:**The total amount of power needed by Chefland is A⋅B=2⋅18=36, and the total that can be provided by the Helium-3 present on the moon is X⋅Y=9⋅4=36, which is sufficient to receive funding, so the answer is`Yes`

.**Test case 4:**The total amount of power needed by Chefland is A⋅B=1⋅100=100, and the total that can be provided by the Helium-3 present on the moon is X⋅Y=2⋅49=98, which is insufficient to receive funding, so the answer is`No`

.

**SOLUTION**

**Program:** **Chef and NextGen HELIUM3 Solution** in Python

```
for _ in range(int(input())):
n,m,x,y=map(int,input().split())
if x*y>=n*m:
print("YES")
else:
print("NO")
```

**Program:** **Chef and NextGen HELIUM3 Solution** in C

```
#include <stdio.h>
int main()
{
int t;
scanf("%d",&t);
while(t--)
{
int a,b,x,y;
scanf("%d %d %d %d",&a,&b,&x,&y);
if(x*y>=a*b)
{
printf("YES\n");
}
else
{
printf("NO\n");
}
}
return 0;
}
```