From 098ab3f9c8ea37ef48d22ccc91c95233cefd04c2 Mon Sep 17 00:00:00 2001 From: Christopher Arndt Date: Sun, 3 Dec 2023 11:16:51 +0100 Subject: [PATCH] Day 03 part one Signed-off-by: Christopher Arndt --- day_03/input_03.txt | 140 +++++++++++++++++++++++++++++++++++++ day_03/sample_input_03.txt | 10 +++ day_03/solution_03.nim | 59 ++++++++++++++++ 3 files changed, 209 insertions(+) create mode 100644 day_03/input_03.txt create mode 100644 day_03/sample_input_03.txt create mode 100644 day_03/solution_03.nim diff --git a/day_03/input_03.txt b/day_03/input_03.txt new file mode 100644 index 0000000..86d4798 --- /dev/null +++ b/day_03/input_03.txt @@ -0,0 +1,140 @@ +...766.......821.547.....577......................................387.....................56..........446.793..........292.................. +...........................%...../.....981..........627..../..........-.....623......610..-..............*..................16......891..... 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+.664.598.. diff --git a/day_03/solution_03.nim b/day_03/solution_03.nim new file mode 100644 index 0000000..d2f7c4a --- /dev/null +++ b/day_03/solution_03.nim @@ -0,0 +1,59 @@ +import std/[cmdline, sequtils, strformat, strutils] + +var fn: string + +if paramCount() > 0: + fn = paramStr(1) +else: + fn = "input_03.txt" + +var result = 0 +var lines = readFile(fn).strip.splitLines +var grid = newSeqWith(lines.len, newSeq[char](lines[0].strip.len)) + + +proc isAdjacentToSymbol(row, col: int): bool = + for i in @[row - 1, row, row + 1]: + if i < 0 or i >= grid.len: + continue + for j in @[col - 1, col, col + 1]: + if i == row and j == col: + continue + if j < 0 or j >= grid[i].len: + continue + var ch = grid[i][j] + if not ch.isDigit and ch != '.': + return true + return false + + +for i, line in lines: + for j, ch in line.strip: + grid[i][j] = ch + +#echo &"Rows: {grid.len}" +#echo &"Cols: {grid[0].len}" + +for i, row in grid: + var isPartNumber = false + var number = "" + + for j, ch in row: + if ch.isDigit: + number &= ch + if isAdjacentToSymbol(i, j): + isPartNumber = true + else: + if isPartNumber: + #echo number.parseInt + result += number.parseInt + elif number.len > 0: + echo &"Not a part number: {number.parseInt} (row {i}, col {j})" + number = "" + isPartNumber = false + + # account for numbers going untl the end of the row + if isPartNumber: + result += number.parseInt + +echo &"Result: {result}"