Admin: Created page with "

 package main  import ( 	"bufio" 	"fmt" 	"log" 	"os" 	"sort" 	"strconv" 	"strings" )  // readLines reads a whole file into memory // and returns a slice of its lines. fun..."

2018-12-16T06:02:36Z

Created page with "<pre> package main import ( "bufio" "fmt" "log" "os" "sort" "strconv" "strings" ) // readLines reads a whole file into memory // and returns a slice of its lines. fun..."

New page

<pre>
package main

import (
"bufio"
"fmt"
"log"
"os"
"sort"
"strconv"
"strings"
)

// readLines reads a whole file into memory
// and returns a slice of its lines.
func readLines(path string) ([]string, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()

var lines []string
scanner := bufio.NewScanner(file)
for scanner.Scan() {
lines = append(lines, scanner.Text())
}
return lines, scanner.Err()
}

// writeLines writes the lines to the given file.
func writeLines(lines []string, path string) error {
file, err := os.Create(path)
if err != nil {
return err
}
defer file.Close()

w := bufio.NewWriter(file)
for _, line := range lines {
fmt.Fprintln(w, line)
}
return w.Flush()
}

func main() {
filename := "A-small-practice.in"
lines, err := readLines(filename)
if err != nil {
log.Fatalf("readLines: %s", err)
}

testCases, _ := strconv.Atoi(lines[0])
var s []string

for i := 1; i < testCases*3; i += 3 {
var v1 []string = strings.Split(lines[i+1], " ")
var v2 []string = strings.Split(lines[i+2], " ")
var v1i, v2i []int
ans := 0
tmpLen, _ := strconv.Atoi(lines[i])
for j := 0; j < tmpLen; j++ {
tmp, _ := strconv.Atoi(v1[j])
v1i = append(v1i, tmp)
tmp, _ = strconv.Atoi(v2[j])
v2i = append(v2i, tmp)
}
sort.Sort(sort.IntSlice(v1i))
sort.Sort(sort.Reverse(sort.IntSlice(v2i)))

for j := 0; j < tmpLen; j++ {
ans += v1i[j] * v2i[j]
}
s = append(s, "Case #"+strconv.Itoa((i/3)+1)+": "+strconv.Itoa(ans))
}
if err := writeLines(s, "A-small-practice.out"); err != nil {
log.Fatalf("Error!", err)
}
}

</pre>

Go/FileIO - Revision history

Admin: Created page with "
package main import ( "bufio" "fmt" "log" "os" "sort" "strconv" "strings" ) // readLines reads a whole file into memory // and returns a slice of its lines. fun..."