package main
import (
"fmt"
"os"
"bufio"
"strconv"
)
func main() {
var _ = strconv.Itoa
var d float64 = 4.0
scanner := bufio.NewScanner(os.Stdin)
var b float64
scanner.Scan()
b, _ = strconv.ParseFloat(scanner.Text(), 64)
fmt.Println(float64(d + b))
}
红颜莎娜
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