PROGRAMMING:Rice bagging
###Task description
There are three heaps of wheat in his yard. The long-term worker wants to carry them away in bags. It is known that each sack can hold up to x kg of wheat. How many sacks do they need at least.
###Input format:
Input only one line, including 4 double precision floating-point numbers. The first three numbers represent the weight of three heaps of wheat, and the fourth number represents X. The maximum number of decimal places of each number is 2.
###Output format:
Output is also a line, the output integer results.
###Input example:
```in
100.00 200.0 306.61 101.10
```
###Output example:
```out
seven
```
###Tips
Please note that the last sack may not be full.
answer：If there is no answer, please comment
There are three heaps of wheat in his yard. The long-term worker wants to carry them away in bags. It is known that each sack can hold up to x kg of wheat. How many sacks do they need at least.
###Input format:
Input only one line, including 4 double precision floating-point numbers. The first three numbers represent the weight of three heaps of wheat, and the fourth number represents X. The maximum number of decimal places of each number is 2.
###Output format:
Output is also a line, the output integer results.
###Input example:
```in
100.00 200.0 306.61 101.10
```
###Output example:
```out
seven
```
###Tips
Please note that the last sack may not be full.
answer：If there is no answer, please comment