Created
December 14, 2023 19:28
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| var input = ` | |
| O....#.... | |
| O.OO#....# | |
| .....##... | |
| OO.#O....O | |
| .O.....O#. | |
| O.#..O.#.# | |
| ..O..#O..O | |
| .......O.. | |
| #....###.. | |
| #OO..#.... | |
| `.trim(); | |
| var input = document.body.textContent.trim() | |
| var data = input.split("\n").map(row => row.split("")); | |
| function tiltNorth(data) { | |
| for (let n = 0; n < data.length; n++) { | |
| for (let i = 1; i < data.length; i++) { | |
| for (let j = 0; j < data[0].length; j++) { | |
| if (data[i][j] === "O" && data[i - 1][j] === ".") { | |
| data[i - 1][j] = "O"; | |
| data[i][j] = "." | |
| } | |
| } | |
| } | |
| } | |
| } | |
| function tiltSouth(data) { | |
| for (let n = 0; n < data.length; n++) { | |
| for (let i = 0; i < data.length - 1; i++) { | |
| for (let j = 0; j < data[0].length; j++) { | |
| if (data[i][j] === "O" && data[i + 1][j] === ".") { | |
| data[i + 1][j] = "O"; | |
| data[i][j] = "." | |
| } | |
| } | |
| } | |
| } | |
| } | |
| function tiltEast(data) { | |
| for (let n = 0; n < data.length; n++) { | |
| for (let i = 0; i < data.length; i++) { | |
| for (let j = 1; j < data[0].length; j++) { | |
| if (data[i][j] === "O" && data[i][j - 1] === ".") { | |
| data[i][j - 1] = "O"; | |
| data[i][j] = "." | |
| } | |
| } | |
| } | |
| } | |
| } | |
| function tiltWest(data) { | |
| for (let n = 0; n < data.length; n++) { | |
| for (let i = 0; i < data.length; i++) { | |
| for (let j = 0; j < data[0].length - 1; j++) { | |
| if (data[i][j] === "O" && data[i][j + 1] === ".") { | |
| data[i][j + 1] = "O"; | |
| data[i][j] = "." | |
| } | |
| } | |
| } | |
| } | |
| } | |
| // 1000 is probably enough | |
| for (let cycle = 0; cycle < 1000; cycle++) { | |
| tiltNorth(data); | |
| tiltEast(data); | |
| tiltSouth(data); | |
| tiltWest(data); | |
| } | |
| var sums = data.map((row, i) => { | |
| const count = data.length - i; | |
| return row.reduce((p, c) => p + ((c === "O") ? 1 : 0), 0) * count; | |
| }) | |
| var sum = sums.reduce((p, c) => p + c, 0); | |
| sum; |
Author
benjamingr
commented
Dec 14, 2023
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