49 lines
825 B
Go
49 lines
825 B
Go
package main
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import (
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"bufio"
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"fmt"
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"os"
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"sort"
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)
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import (
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"github.com/meatballhat/box-o-sand/algs4/go/algs4"
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)
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const USAGE string = `Usage: algs4-binarysearch <whitelist-file>
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You must also provide input on stdin.`
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func main() {
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if len(os.Args) < 2 {
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fmt.Println(USAGE)
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os.Exit(2)
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}
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whiteListFile, err := os.Open(string(os.Args[1]))
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if err != nil {
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fmt.Println("Failed to open whitelist file:", err)
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}
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whiteList, err := algs4.ReadInts(bufio.NewReader(whiteListFile))
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if err != nil {
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fmt.Println("UGH: ", err)
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os.Exit(1)
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}
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sort.Ints(whiteList)
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inputs, err := algs4.ReadInts(bufio.NewReader(os.Stdin))
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if err != nil {
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fmt.Println("Failed to read inputs:", err)
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os.Exit(1)
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}
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for _, key := range inputs {
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if algs4.BinarySearchRank(key, whiteList) == -1 {
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fmt.Println(key)
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}
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}
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}
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