42 lines
557 B
Go
42 lines
557 B
Go
package main
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"strconv"
|
|
)
|
|
|
|
func main() {
|
|
file, err := os.Open("../input.txt")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer file.Close()
|
|
|
|
numbers := []int{}
|
|
|
|
scanner := bufio.NewScanner(file)
|
|
for scanner.Scan() {
|
|
n, err := strconv.Atoi(scanner.Text())
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
numbers = append(numbers, n)
|
|
}
|
|
if err := scanner.Err(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
for _, i := range numbers {
|
|
for _, j := range numbers {
|
|
if i+j == 2020 {
|
|
fmt.Println(i * j)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|