83 lines
1.5 KiB
Go
83 lines
1.5 KiB
Go
// 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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type visit struct {
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domain string
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country string
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}
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var (
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// use a comparable struct for the keys
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visits = make(map[visit]int)
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domains, countries []string
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dupDomains = make(map[string]bool)
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dupCountries = make(map[string]bool)
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line int
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)
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in := bufio.NewScanner(os.Stdin)
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for in.Scan() {
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line++
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fields := strings.Fields(in.Text())
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if len(fields) != 3 {
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fmt.Printf("Wrong input: %v\n", fields)
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return
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}
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v := visit{
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domain: fields[0],
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country: fields[1],
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}
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// increase the visit counts per domain + country
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fhits := fields[2]
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hits, err := strconv.Atoi(fhits)
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if err != nil {
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fmt.Printf("Wrong input: %q (line #%d)\n", fhits, line)
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return
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}
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visits[v] += hits
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// only add the domain once
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if !dupDomains[v.domain] {
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domains = append(domains, v.domain)
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dupDomains[v.domain] = true
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}
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// only add the country once
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if !dupCountries[v.country] {
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countries = append(countries, v.country)
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dupCountries[v.country] = true
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}
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}
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// print the summary grouped by domain
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for _, d := range domains {
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fmt.Println(d)
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for _, c := range countries {
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v := visit{domain: d, country: c}
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fmt.Printf("\t%s %d\n", c, visits[v])
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}
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}
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}
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