Given an expression consisting of addition, subtraction, and multiplication operations, calculate the result and print it.
### Input
- A single line containing the expression. Addition, subtraction, and multiplication operations correspond to `+`, `-`, `*`. There are no spaces in the expression.
### Output
- Print an integer which is the result of the expression.
### Constraints
- Ensure that the expression can be processed using 64-bit signed integer data type (`long long` in C++).
- The length of the expression does not exceed $1000$.
### Example
Input:
```
1-2*3+4*5
```
Output:
```
15
```
