main.go 源码
// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials : https://learngoprogramming.com
// In-person training : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus
package main
import (
"bufio"
"fmt"
"os"
"strings"
)
func main() {
in := bufio.NewScanner(os.Stdin)
words := make(map[string]bool)
for in.Scan() {
w := strings.ToLower(in.Text())
if words[w] {
fmt.Println("TWICE!")
return
}
words[in.Text()] = true
}
}
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