more string parsing! and custom sorts in go
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799
05/input
Normal file
799
05/input
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FFBBFBFLLL
|
||||
FBBFFBBRLL
|
||||
BBFFBBFRLL
|
||||
BBFFFFFRRL
|
||||
FFFBBFFLLL
|
||||
FBBBFBFRRR
|
||||
BFBFFBFLLL
|
||||
BBFBFFFLRR
|
||||
FBBFBFBRRL
|
||||
FFBFBFFRLL
|
||||
FFBFFFBLRR
|
||||
FFBBFBBLRR
|
||||
FFBBFBFLLR
|
||||
FBFFFBBLRL
|
||||
FBFBFBFLLR
|
||||
BBFFFBBLLR
|
||||
FBFFFBFLLR
|
||||
FBBBFBFLRR
|
||||
BBFBBBBLLL
|
||||
FBFBFFFLLL
|
||||
FFBBBFBRRR
|
||||
FFBBFFFRLL
|
||||
BBFBBFFLRL
|
||||
FBFBBFBRLR
|
||||
BFFFBBFLRR
|
||||
BFBFFBBRLL
|
||||
BFFFBBFRRL
|
||||
FFBBBFBLLL
|
||||
FBFBBBFRLR
|
||||
FBBBFFBLRL
|
||||
BFBFFFFLRL
|
||||
FFBFFBBLRR
|
||||
FBFBBBBLRL
|
||||
BBFBFBBLLR
|
||||
FFBBFFFLRL
|
||||
FBFFFFFRRR
|
||||
FBBBBFFLRL
|
||||
FFBBBFBLLR
|
||||
BFBFFBBRRL
|
||||
FBFFFBFLLL
|
||||
FFFBBFBRRL
|
||||
BBFBFBBRLR
|
||||
BBFBBFBRRR
|
||||
BBFBBBFLRR
|
||||
BFFBFFBLLL
|
||||
FFBFBBBRLL
|
||||
BBFBFFFLLR
|
||||
BBFFBBFRLR
|
||||
FFBBFBFRRR
|
||||
BFBBFBBLRL
|
||||
BBFBFBFLLL
|
||||
BFBFFBFLRL
|
||||
BFBBBFBLLL
|
||||
FFBFFBFLLR
|
||||
BFFBBBFRRR
|
||||
BFFFFBFLLL
|
||||
BFBFBFBLRL
|
||||
FBFBFBBRLR
|
||||
FBFFFFFRLR
|
||||
FFBBBBBLRR
|
||||
BBFFFBBLRR
|
||||
BBFBBBFLRL
|
||||
FBFFBBBRLR
|
||||
FFBBBBBLLL
|
||||
FFBFBBBRRR
|
||||
FFBBBBBRLR
|
||||
BFFFFBBRLL
|
||||
BFBBBBBLRL
|
||||
FBBFBBFRLL
|
||||
FBBBBBBRLL
|
||||
BBFFBFFRLR
|
||||
BBFFBFBLRL
|
||||
BFFBFBBLRL
|
||||
BBFFFFBLRR
|
||||
FBBFBFBLRL
|
||||
FFBFBBBRRL
|
||||
BBFFFBBRLL
|
||||
BFBFFFFRLR
|
||||
BFBFBBFLRR
|
||||
BBFFFBBLLL
|
||||
FBBBBFBRRL
|
||||
FFBBBFFRRR
|
||||
FBBBFBBRRL
|
||||
FBBFBFFRRR
|
||||
FFBFFBBRLR
|
||||
BFBBBFFLLL
|
||||
FFBFFBFLRL
|
||||
BFFBBBFLRR
|
||||
BFBFFFBRRR
|
||||
FBBFBBFRRR
|
||||
BFFFBFFRRR
|
||||
BBFBFFFRRL
|
||||
BFFBFFBRLL
|
||||
FFFBBFFRLR
|
||||
FBFFBBFLLL
|
||||
FBFFFBFRRL
|
||||
FBBFBBBRRR
|
||||
FFBFBFFLRL
|
||||
BBFBFFBLLL
|
||||
FBBFFBBRRL
|
||||
BBFBFFBLRR
|
||||
FBFBBFBLLL
|
||||
FBFBFFBRLR
|
||||
BFFFBFFRLR
|
||||
BFBFBFFRLR
|
||||
FFBBBBFRLR
|
||||
FBBFFBFRRL
|
||||
FFBFFFFRLR
|
||||
BFBFFFBLLR
|
||||
FFBFFFFRRR
|
||||
FBBBFFFLLR
|
||||
BFFBFFFRLL
|
||||
FBBFFBBLRL
|
||||
BFFBFBFRRR
|
||||
BFFBFBBRLL
|
||||
BFBBFBBLLR
|
||||
BBFBFBBRRL
|
||||
FBFBFFBLLR
|
||||
FBFFFBFRLR
|
||||
FFBFBBFLLL
|
||||
FBBBFBFLRL
|
||||
FBFFBBFRLL
|
||||
BFFFBBBLLR
|
||||
BFFBBFBLRL
|
||||
FBFBFBBLLL
|
||||
BBFFFFFRRR
|
||||
FBFBBBFRRR
|
||||
FBFBFFFRLL
|
||||
FFBFBFBLRL
|
||||
FBFBFBFLRL
|
||||
BFFFFFFLLL
|
||||
FFBBFFBRRR
|
||||
FBBBBFBRLL
|
||||
FFFBBFFLRL
|
||||
BFFBBFBRRR
|
||||
FBFBBFFRRR
|
||||
BFBBFBFLLL
|
||||
BFFFBBBRRR
|
||||
FFBFBFBLLR
|
||||
BFFBFBFLRR
|
||||
BFBBBFFRLR
|
||||
BFFFFFBRRR
|
||||
BFFFFFBLLR
|
||||
BFFBFFFLRR
|
||||
BBFFFFBRLL
|
||||
FBBFFBFRRR
|
||||
BBFFBFBLLR
|
||||
BBFFFFBRLR
|
||||
BBFFFBFLRR
|
||||
BFBBFBFLLR
|
||||
BBFFBFBRLL
|
||||
FBBBFBBRRR
|
||||
FBFBFBBRRL
|
||||
FFBFBBBLRL
|
||||
BFFFBFBLLL
|
||||
FBBFFBBLLR
|
||||
FBBBFBFRLR
|
||||
FBBBFBFRLL
|
||||
BFBFBBBRLL
|
||||
BBFBBFFRRR
|
||||
FBFBBBBRLL
|
||||
BFBBBBBLRR
|
||||
BFFBFFBRRL
|
||||
BBFFBBFLRL
|
||||
BFFBBFBRLR
|
||||
FFBFFFBRLL
|
||||
FFFBFBBRRL
|
||||
BFBFFFBLRL
|
||||
BFFBFBBRRR
|
||||
FBBFFFFLRL
|
||||
BBFBFBFLLR
|
||||
BFFBFFBLLR
|
||||
BFFBBBBLRR
|
||||
BFBBBFFLRR
|
||||
FBBBBFBLRL
|
||||
FBBBBBFLLL
|
||||
FFBFFFFRLL
|
||||
FFBBBBBRLL
|
||||
BFFFFFBRLL
|
||||
BFFFBBBRRL
|
||||
BBFFFBFRLR
|
||||
BFBBFBFLRL
|
||||
BFFFBFBLRL
|
||||
FBBFBFFRLR
|
||||
BBFBFFBRLL
|
||||
BBFFBFBRRR
|
||||
BFBBBFBRLR
|
||||
BFFBFFFRRL
|
||||
BFBBBFBLRL
|
||||
BFBBFFFRRR
|
||||
FBFFFBFLRL
|
||||
FFBFBBFRRL
|
||||
BFFFFFFRLR
|
||||
BFFBFBBLRR
|
||||
FFFBBFBLRR
|
||||
BFBBBFBRLL
|
||||
FBFFFFFLLL
|
||||
BFFBBBFLRL
|
||||
FBFBFFBLRR
|
||||
FBFFBBBLRL
|
||||
FBFBBFBRLL
|
||||
FFBFBBFLRR
|
||||
BFBBFFBLLL
|
||||
BBFBBBFRRR
|
||||
FBFBBBBLRR
|
||||
BFBFBFFLRR
|
||||
FBBFFBFRLL
|
||||
FBFBBBFLRR
|
||||
FFFBFBBLLR
|
||||
BBFBFFBRRR
|
||||
FBFFBFFLLL
|
||||
BBFFBFFRRL
|
||||
FFBFBFFLLL
|
||||
BFFBBBFRRL
|
||||
FBBFBFFLLR
|
||||
BFBBFFFRLR
|
||||
BFBFBFBLLL
|
||||
BFFBFFBRLR
|
||||
FBBBBBFLRL
|
||||
BFBBBFFLLR
|
||||
FFFBFBBLRR
|
||||
BBFBBFFLLL
|
||||
FBBBFFBLLL
|
||||
BBFFFFBLRL
|
||||
FFBBFBBRRL
|
||||
FFFBBBBLLR
|
||||
FBFBFBFLLL
|
||||
FBFBFBBLRR
|
||||
BFFFFFFRRL
|
||||
FFBFFBBRRR
|
||||
FFFBBFFLLR
|
||||
BFFFFBFRLR
|
||||
FBFFBFBLLL
|
||||
BFFFFBBLRR
|
||||
BFBFFBBRRR
|
||||
BBFFBBFLLL
|
||||
FBBFFFBLLL
|
||||
FBFFFFBLLL
|
||||
FBFFFBBLLR
|
||||
BBFFBBFLRR
|
||||
FFBBBFBLRR
|
||||
BFFFFBFRRR
|
||||
BBFFBFBLRR
|
||||
108
05/main.go
Normal file
108
05/main.go
Normal file
@ -0,0 +1,108 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"fmt"
|
||||
"os"
|
||||
"sort"
|
||||
)
|
||||
|
||||
func main() {
|
||||
partOne()
|
||||
partTwo()
|
||||
}
|
||||
|
||||
type boardingPass struct {
|
||||
passID string
|
||||
row int
|
||||
seat int
|
||||
id int
|
||||
}
|
||||
|
||||
func parsePassID(s string) (int, int) {
|
||||
bottom := 0
|
||||
top := 127
|
||||
left := 0
|
||||
right := 7
|
||||
|
||||
for _, r := range s {
|
||||
switch {
|
||||
case r == 'F':
|
||||
top = ((top - bottom - 1) / 2) + bottom
|
||||
case r == 'B':
|
||||
bottom = (top + bottom + 1) / 2
|
||||
case r == 'L':
|
||||
right = ((right - left - 1) / 2) + left
|
||||
case r == 'R':
|
||||
left = (left + right + 1) / 2
|
||||
}
|
||||
}
|
||||
return top, left
|
||||
}
|
||||
|
||||
// Instead of zones or groups, this airline uses binary space partitioning to seat people.
|
||||
// A seat might be specified like FBFBBFFRLR, where F means "front", B means "back", L means "left", and R means "right".
|
||||
// Every seat also has a unique seat ID: multiply the row by 8, then add the column.
|
||||
// Here are some other boarding passes:
|
||||
// BFFFBBFRRR: row 70, column 7, seat ID 567.
|
||||
// FFFBBBFRRR: row 14, column 7, seat ID 119.
|
||||
// BBFFBBFRLL: row 102, column 4, seat ID 820.
|
||||
// As a sanity check, look through your list of boarding passes. What is the highest seat ID on a boarding pass?
|
||||
|
||||
func partOne() {
|
||||
f, _ := os.Open("input")
|
||||
reader := bufio.NewReader(f)
|
||||
scanner := bufio.NewScanner(reader)
|
||||
|
||||
passes := []boardingPass{}
|
||||
maxID := 0
|
||||
|
||||
for scanner.Scan() {
|
||||
line := scanner.Text()
|
||||
row, column := parsePassID(line)
|
||||
passes = append(passes, boardingPass{
|
||||
passID: line,
|
||||
row: row,
|
||||
seat: column,
|
||||
id: (row * 8) + column,
|
||||
})
|
||||
if (row*8)+column > maxID {
|
||||
maxID = (row * 8) + column
|
||||
}
|
||||
}
|
||||
|
||||
fmt.Println(maxID)
|
||||
}
|
||||
|
||||
// It's a completely full flight, so your seat should be the only missing boarding pass in your list.
|
||||
// However, there's a catch: some of the seats at the very front and back of the plane don't exist on this aircraft, so they'll be missing from your list as well.
|
||||
// Your seat wasn't at the very front or back, though; the seats with IDs +1 and -1 from yours will be in your list.
|
||||
|
||||
func partTwo() {
|
||||
f, _ := os.Open("input")
|
||||
reader := bufio.NewReader(f)
|
||||
scanner := bufio.NewScanner(reader)
|
||||
|
||||
passes := []boardingPass{}
|
||||
|
||||
for scanner.Scan() {
|
||||
line := scanner.Text()
|
||||
row, column := parsePassID(line)
|
||||
passes = append(passes, boardingPass{
|
||||
passID: line,
|
||||
row: row,
|
||||
seat: column,
|
||||
id: (row * 8) + column,
|
||||
})
|
||||
}
|
||||
|
||||
sort.Slice(passes, func(i, j int) bool {
|
||||
return passes[i].id < passes[j].id
|
||||
})
|
||||
|
||||
for i, s := range passes {
|
||||
if i != 0 && passes[i-1].id != s.id-1 {
|
||||
fmt.Println(s.id - 1)
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user