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f.go
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f.go
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package main
import (
"bufio"
"fmt"
"os"
"strconv"
)
func readFile() []int {
file, ferr := os.Open("input.txt")
if ferr != nil {
panic(ferr)
}
scanner := bufio.NewScanner(file)
scanner.Split(bufio.ScanWords)
var data []int
for scanner.Scan() {
x, err := strconv.Atoi(scanner.Text())
if err != nil {
panic(err)
}
data = append(data, x)
}
return data
}
func part1(numbers []int) int {
var result int = -1
for _, n1 := range numbers {
for _, n2 := range numbers {
if n1+n2 == 2020 {
fmt.Println(n1, n2, n1*n2)
result = n1 * n2
return result
}
}
}
return result
}
func part2(numbers []int) int {
var result int = -1
for _, n1 := range numbers {
for _, n2 := range numbers {
for _, n3 := range numbers {
if n1+n2+n3 == 2020 {
fmt.Println(n1, n2, n3, n1*n2*n3)
result = n1 * n2 * n3
return result
}
}
}
}
return result
}
func main() {
// Read file first
var input []int = readFile()
// Part 1
fmt.Println(part1(input))
// Part 2
fmt.Println(part2(input))
}