alazyreader/AdventOfCode2023
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a little more refactoring

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This commit is contained in:
David 2023-12-03 20:57:52 -05:00
parent 4e64387873
commit 561b10916d
1 changed files with 26 additions and 40 deletions
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64
03/main.go
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@ -45,8 +45,8 @@ type coord struct {
col int col int
} }
func isSymbol(s schematic, row, col int) bool { func isSymbol(s schematic, c coord) bool {
if c, ok := s[coord{row, col}]; ok { if c, ok := s[c]; ok {
return c.symb != 0 return c.symb != 0
} }
return false return false
@ -87,20 +87,13 @@ func partOne() {
for col := 0; col <= 139; col++ { for col := 0; col <= 139; col++ {
if entry, ok := schematic[coord{row, col}]; ok && entry.symb == 0 { if entry, ok := schematic[coord{row, col}]; ok && entry.symb == 0 {
part := mustAtoi(entry.num) part := mustAtoi(entry.num)
if isSymbol(schematic, row, col-1) { if isSymbol(schematic, coord{row, col - 1}) || isSymbol(schematic, coord{row, col + len(entry.num)}) {
// look behind // look ahead and look behind
sum += part
}
if isSymbol(schematic, row, col+len(entry.num)) {
// look ahead
sum += part sum += part
} }
for i := -1; i < len(entry.num)+1; i++ { for i := -1; i < len(entry.num)+1; i++ {
// check row above and below // check row above and below
if isSymbol(schematic, row-1, col+i) { if isSymbol(schematic, coord{row - 1, col + i}) || isSymbol(schematic, coord{row + 1, col + i}) {
sum += part
}
if isSymbol(schematic, row+1, col+i) {
sum += part sum += part
} }
} }
@ -149,38 +142,31 @@ func partTwo() {
if entry, ok := schematic[coord{row, col}]; ok && entry.symb == 0 { if entry, ok := schematic[coord{row, col}]; ok && entry.symb == 0 {
offset := len(entry.num) offset := len(entry.num)
part := mustAtoi(entry.num) part := mustAtoi(entry.num)
if isSymbol(schematic, row, col-1) { found := false
k := coord{row, col - 1} k := coord{}
if gears[k] != 0 { if isSymbol(schematic, coord{row, col - 1}) {
sum += gears[k] * part k = coord{row, col - 1}
} else { found = true
gears[k] = part
}
}
if isSymbol(schematic, row, col+offset) {
k := coord{row, col + offset}
if gears[k] != 0 {
sum += gears[k] * part
} else {
gears[k] = part
} }
if isSymbol(schematic, coord{row, col + offset}) {
k = coord{row, col + offset}
found = true
} }
for i := -1; i < offset+1; i++ { for i := -1; i < offset+1; i++ {
if isSymbol(schematic, row-1, col+i) { if isSymbol(schematic, coord{row - 1, col + i}) {
k := coord{row - 1, col + i} k = coord{row - 1, col + i}
if gears[k] != 0 { found = true
sum += gears[k] * part }
} else { if isSymbol(schematic, coord{row + 1, col + i}) {
k = coord{row + 1, col + i}
found = true
}
}
if found {
if gears[k] == 0 {
gears[k] = part gears[k] = part
}
}
if isSymbol(schematic, row+1, col+i) {
k := coord{row + 1, col + i}
if gears[k] != 0 {
sum += gears[k] * part
} else { } else {
gears[k] = part sum += gears[k] * part
}
} }
} }
} }