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package main

//go:generate -command yacc goyacc
//go:generate yacc -o calc.go calc.y

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		line := scanner.Text()
		result, err := Parse(line)
		if err != nil {
			fmt.Println("error:", err)
			continue
		}
		fmt.Println(result)
	}
}