AoC 2020: day4

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

2018/day_11/prova.go

@@ -1,77 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"strconv"
-)
-
-func calculate(i int, j int, memo *[][]int, ps *[][]int, input int) int {
-	t := 0
-	for x := i; x < i+3; x++ {
-		for y := j; y < j+3; y++ {
-			if (*memo)[y][x] != 0 {
-				t += (*memo)[y][x]
-			} else {
-				id := x + 10
-				serial := (id*y + input)
-				hundreds := strconv.Itoa(serial * id)
-				var result int
-				if len(hundreds) >= 3 {
-					result, _ = strconv.Atoi(string(hundreds[len(hundreds)-3]))
-				}
-				result -= 5
-				t += result
-				(*memo)[y][x] = result
-				(*ps)[y][x] = result + (*ps)[y-1][x] + (*ps)[y][x-1] - (*ps)[y-1][x-1]
-			}
-		}
-	}
-	return t
-}
-
-func main() {
-
-	input := 7347
-
-	var res, X, Y int
-
-	// technically memo isn't needed anymore but I added partial sums after
-	// part 2 and didn't wanna clean up my code after for part 1
-	memo := make([][]int, 301)
-	partialSums := make([][]int, 301)
-	for i := range memo {
-		memo[i] = make([]int, 301)
-		partialSums[i] = make([]int, 301)
-	}
-
-	for i := 1; i <= 298; i++ {
-		for j := 1; j <= 298; j++ {
-			if c := calculate(i, j, &memo, &partialSums, input); c > res {
-				res = c
-				X = i
-				Y = j
-			}
-		}
-	}
-
-	fmt.Printf("Part 1: %v, %v, %v\n", res, X, Y)
-
-	res = 0
-	var sz int
-
-	for size := 1; size < 300; size++ {
-		for i := size; i <= 300; i++ {
-			for j := size; j <= 300; j++ {
-				if c := partialSums[i][j] - partialSums[i-size][j] -
-					partialSums[i][j-size] + partialSums[i-size][j-size]; c > res {
-					res = c
-					Y = i - size + 1
-					X = j - size + 1
-					sz = size
-				}
-			}
-		}
-	}
-
-	fmt.Printf("Part 2: %v, %v, %v, %v\n", res, X, Y, sz)
-}