Write a program that evaluates an expression consisting of three numbers and two characters (only
«+» or
«–» characters are allowed). The input is a character string representing an arithmetic expression. All numbers are integers.
Examples
| # |
Input |
Output |
| 1 |
12+3+45 |
60 |
| 2 |
12-45+3 |
-30 |
Запрещенные операторы:eval