66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
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// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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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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"strconv"
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"strings"
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)
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func main() {
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var (
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// Stores the visits per unique domain
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sum = make(map[string]int)
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// Stores the unique domain names for printing
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domains []string
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in = bufio.NewScanner(os.Stdin)
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)
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// Scan the standard-in line by line
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for line := 0; in.Scan(); line++ {
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// Parse the fields
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fields := strings.Fields(in.Text())
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if len(fields) != 2 {
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fmt.Printf("wrong input: %v (line #%d)\n", fields, line)
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return
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}
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domain, visits := fields[0], fields[1]
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// Collect the unique domains
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if _, ok := sum[domain]; !ok {
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domains = append(domains, domain)
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}
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// Sum the total visits per domain
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n, _ := strconv.Atoi(visits)
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if n < 0 {
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fmt.Printf("wrong input: %q (line #%d)\n", visits, line)
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return
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}
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sum[domain] += n
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}
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// Print the visits per domain
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var total int
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for _, domain := range domains {
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hits := sum[domain]
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fmt.Printf("%-25s -> %d\n", domain, hits)
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total += hits
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}
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// Print the total visits for all domains
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fmt.Printf("\n%-25s -> %d\n", "TOTAL", total)
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}
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