```
Exception in thread "main" java.lang.NumberFormatException: For input string: "9999999999999999999"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:495)
	at ru.fizteh.fivt.students.inaumov.calculator.Analysis.calculateAnswer(Analysis.java:133)
	at ru.fizteh.fivt.students.inaumov.calculator.Calculator.main(Calculator.java:24)
```