diff options
| -rw-r--r-- | 2024/04/puzzles.go | 58 |
1 files changed, 31 insertions, 27 deletions
diff --git a/2024/04/puzzles.go b/2024/04/puzzles.go index d59791f..42e27cd 100644 --- a/2024/04/puzzles.go +++ b/2024/04/puzzles.go @@ -31,33 +31,34 @@ func parseInput(sc *bufio.Scanner) [][]rune { } // START PART 1 + func xmasCnt(data [][]rune) int { cnt := 0 for i := range data { for j := range data[i] { coords := [...][8]int{ - {i+0, j+0, i+1, j+0, i+2, j+0, i+3, j+0}, // Vertical; top-down - {i+0, j+0, i-1, j+0, i-2, j+0, i-3, j+0}, // Vertical; down-top - {i+0, j+0, i+0, j+1, i+0, j+2, i+0, j+3}, // Horizontal; left-right - {i+0, j+0, i+0, j-1, i+0, j-2, i+0, j-3}, // Horizontal; left-right - {i+0, j+0, i-1, j+1, i-2, j+2, i-3, j+3}, // Diagonal; bl-tr - {i+0, j+0, i+1, j+1, i+2, j+2, i+3, j+3}, // Diagonal; tl-br - {i+0, j+0, i+1, j-1, i+2, j-2, i+3, j-3}, // Diagonal; tr-bl - {i+0, j+0, i-1, j-1, i-2, j-2, i-3, j-3}, // Diagonal; br-tl + {i + 0, j + 0, i + 1, j + 0, i + 2, j + 0, i + 3, j + 0}, // Vertical; top-down + {i + 0, j + 0, i - 1, j + 0, i - 2, j + 0, i - 3, j + 0}, // Vertical; down-top + {i + 0, j + 0, i + 0, j + 1, i + 0, j + 2, i + 0, j + 3}, // Horizontal; left-right + {i + 0, j + 0, i + 0, j - 1, i + 0, j - 2, i + 0, j - 3}, // Horizontal; left-right + {i + 0, j + 0, i - 1, j + 1, i - 2, j + 2, i - 3, j + 3}, // Diagonal; bl-tr + {i + 0, j + 0, i + 1, j + 1, i + 2, j + 2, i + 3, j + 3}, // Diagonal; tl-br + {i + 0, j + 0, i + 1, j - 1, i + 2, j - 2, i + 3, j - 3}, // Diagonal; tr-bl + {i + 0, j + 0, i - 1, j - 1, i - 2, j - 2, i - 3, j - 3}, // Diagonal; br-tl } for _, x := range coords { - if x[0] >= 0 && x[0] < len(data) && - x[2] >= 0 && x[2] < len(data) && - x[4] >= 0 && x[4] < len(data) && - x[6] >= 0 && x[6] < len(data) && - x[1] >= 0 && x[1] < len(data[0]) && - x[3] >= 0 && x[3] < len(data[0]) && - x[5] >= 0 && x[5] < len(data[0]) && - x[7] >= 0 && x[7] < len(data[0]) && - data[x[0]][x[1]] == 'X' && - data[x[2]][x[3]] == 'M' && - data[x[4]][x[5]] == 'A' && - data[x[6]][x[7]] == 'S' { + if x[0] >= 0 && x[0] < len(data) && + x[2] >= 0 && x[2] < len(data) && + x[4] >= 0 && x[4] < len(data) && + x[6] >= 0 && x[6] < len(data) && + x[1] >= 0 && x[1] < len(data[0]) && + x[3] >= 0 && x[3] < len(data[0]) && + x[5] >= 0 && x[5] < len(data[0]) && + x[7] >= 0 && x[7] < len(data[0]) && + data[x[0]][x[1]] == 'X' && + data[x[2]][x[3]] == 'M' && + data[x[4]][x[5]] == 'A' && + data[x[6]][x[7]] == 'S' { cnt++ } } @@ -65,24 +66,27 @@ func xmasCnt(data [][]rune) int { } return cnt } + // END PART 1 START PART 2 + func xmasCnt(data [][]rune) int { cnt := 0 for i := range data { for j := range data[i] { if data[i][j] != 'A' || - i == 0 || i == len(data) - 1 || - j == 0 || j == len(data[0]) - 1 { + i == 0 || i == len(data)-1 || + j == 0 || j == len(data[0])-1 { continue } - x1 := []rune{data[i-1][j-1], data[i+1][j+1]} - x2 := []rune{data[i+1][j-1], data[i-1][j+1]} - if (((x1[0] == 'S' && x1[1] == 'M') || (x1[0] == 'M' && x1[1] == 'S')) && - ((x2[0] == 'S' && x2[1] == 'M') || (x2[0] == 'M' && x2[1] == 'S'))) { + x1 := [...]rune{data[i-1][j-1], data[i+1][j+1]} + x2 := [...]rune{data[i+1][j-1], data[i-1][j+1]} + if ((x1[0] == 'S' && x1[1] == 'M') || (x1[0] == 'M' && x1[1] == 'S')) && + ((x2[0] == 'S' && x2[1] == 'M') || (x2[0] == 'M' && x2[1] == 'S')) { cnt++ } } } return cnt } -// END PART 2
\ No newline at end of file + +// END PART 2 |