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of Code Visualizations","owner":{"id":"93d474714c1f5db5","login":"nifleysnifley","name":"Nifley"}},"type":"notebook","body":{"title":"Advent of Code 2021 day 9 - Smoke Basin","cells":[{"id":0,"value":"# Advent of Code 2021 day 9 - Smoke Basin","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":11,"value":"$2e","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":721,"value":"{\n let p1 = minima.map(([x,y]) => grid[x][y] + 1).reduce((a,b) => a + b);\n let p2 = Object.values(basins).map(s => s.length).sort((a,b) => b - a).slice(0,3).reduce((a,b) => a * b);\n \n return html`

Solutions:

Part one - ${p1}

Part two - ${p2}

`\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":14,"value":"height = width","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":757,"value":"cellSz = width / grid.length","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":86,"value":"minima = {\n let m = []\n\n for (let y = 0; y < grid.length; ++y) {\n for (let x = 0; x < grid[0].length; ++x) {\n let min_nbr = Math.min(...[[-1,0],[1,0],[0,-1],[0,1]].map(([ny,nx]) => (grid[y+ny] || [])[x+nx]).filter(e=>e!=undefined));\n if (grid[y][x] < min_nbr)\n m.push([y,x])\n }\n }\n\n return m;\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":194,"value":"basins = Object.fromEntries(minima.map(m => { \n let b = [];\n \n function ffill(x, y) {\n if (x >= 0 && x < grid.length && y >= 0 && y < grid[0].length && !b.includes(x + y * grid.length) && grid[x][y] < 9) {\n b.push(x + y * grid.length);\n ffill(x+1,y);\n ffill(x-1,y);\n ffill(x,y+1);\n ffill(x,y-1);\n }\n }\n\n ffill(m[0], m[1]);\n\n return [m.toString(), b.map(c => [c % grid.length, Math.floor(c / grid.length)])];\n}))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":259,"value":"function flow(sx,sy) {\n let minnbr = (x,y) => [[-1,0],[1,0],[0,-1],[0,1],[0,0]].map(([nx,ny]) => [(grid[x+nx] || [])[y+ny], [x+nx,y+ny]]).filter(e=>e[0]!=undefined).reduce((a,b) => a[0] < b[0] ? a : b)\n\n let walk = [[sx,sy]];\n \n let x = sx, y = sy;\n let min = minnbr(x,y);\n while (min[1].toString() != [x,y].toString()) {\n [x,y] = min[1];\n walk.push(min[1])\n min = minnbr(x,y);\n }\n \n return walk;\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":63,"value":"import {heatmap} from \"@fil/heatmap\"","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":147,"value":"class Queue {\n constructor(arr) {\n this.data = arr || [];\n this.begin = 0;\n }\n\n enqueue(e) {\n this.data.push(e);\n }\n\n dequeue() {\n let e = this.data[this.begin++];\n if (this.begin >= this.data.length / 2) {\n this.data = this.data.splice(0, this.begin);\n }\n return e;\n }\n\n get length() {\n return this.data.length;\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":3,"value":"$2f","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W30","stdlib":"1","titling":"auto"}} 2d:"$2c:body"