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Day 8

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This commit is contained in:
Nick Thomas
2020-12-08 16:19:49 +00:00
parent 4d2dec6e56
commit 7f2b425726
3 changed files with 745 additions and 0 deletions
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646
08/input Normal file
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acc +8
nop +139
nop +383
jmp +628
acc -6
acc +29
acc +9
jmp +457
acc +29
acc +38
nop +451
jmp +44
acc +24
nop +260
acc +20
jmp +24
acc +36
acc +41
acc +31
acc +42
jmp +35
acc +21
nop +216
acc +7
jmp +42
nop +408
acc +18
acc -4
jmp +532
acc -8
acc +13
jmp +529
acc +36
jmp +257
acc +26
acc +24
acc -11
nop +508
jmp +249
acc +44
acc +25
jmp +464
acc +47
jmp +318
acc -6
acc -1
jmp +175
acc +19
acc +25
acc +24
jmp +523
acc -7
acc +45
jmp +353
jmp +67
acc -1
jmp -17
acc -9
jmp +180
acc +19
acc -15
acc +5
jmp +52
nop +312
acc +38
jmp -6
acc +6
acc -11
acc -6
jmp +357
jmp +455
acc +27
acc +29
acc +9
nop +414
jmp +380
jmp +1
acc +33
jmp +47
acc +12
acc +34
acc -9
acc +17
jmp +214
jmp +125
acc +38
acc +38
acc +16
jmp +310
acc +9
acc +10
acc -2
nop -84
jmp +329
nop +120
nop -70
jmp -88
jmp +1
jmp +1
acc +23
jmp -34
nop +372
acc +18
acc +3
acc +24
jmp -50
acc -11
acc +27
nop +441
jmp +443
acc +44
acc -3
acc +7
jmp +389
acc -5
acc +36
acc -17
acc +15
jmp +13
acc +39
jmp +407
acc +8
acc +21
jmp +360
jmp +425
acc +7
acc +29
acc +6
jmp +10
jmp +1
jmp +426
acc +23
jmp +3
nop +2
jmp +1
jmp +240
acc +16
jmp -2
jmp +47
jmp +488
jmp +1
acc +45
jmp +1
acc +20
jmp +344
jmp +407
acc +2
acc +3
jmp +117
acc +50
jmp -134
acc +1
jmp +238
acc +27
acc -11
acc +16
nop +134
jmp +116
acc -16
nop +393
jmp +2
jmp +24
nop +98
acc +36
acc +0
nop +268
jmp +131
nop +294
acc +23
acc +26
acc +43
jmp +358
nop +316
jmp +300
acc +22
acc +47
acc +19
acc +2
jmp +228
jmp +176
acc -4
acc +20
nop +83
acc -19
jmp -99
acc +39
nop +374
acc +3
jmp +57
jmp +1
acc +42
jmp +404
acc +4
acc -4
acc -10
nop +293
jmp +349
acc -9
acc +33
jmp +284
nop +1
acc +18
acc -1
acc -5
jmp +411
acc +4
acc -6
acc +16
jmp +313
acc +0
acc +39
jmp +3
acc -13
jmp +148
nop +51
nop -207
nop +357
acc -19
jmp +409
acc +32
jmp +103
acc +5
jmp +116
nop +399
acc +19
acc +39
nop +78
jmp +298
acc -16
acc +31
jmp +1
acc +45
jmp -207
acc +6
acc +36
acc +34
acc +47
jmp -112
acc +23
acc +4
jmp +289
acc -17
nop +307
nop -92
jmp -146
jmp +293
nop +44
acc +5
acc +2
acc -19
jmp +172
acc +10
acc +49
acc -2
jmp +6
acc +3
jmp +1
acc -19
acc +35
jmp +328
acc +38
acc -5
nop -83
jmp -138
jmp -55
acc +35
jmp +1
jmp -216
nop +220
jmp +116
jmp -78
nop +331
jmp +118
jmp +287
jmp -258
jmp -181
nop +85
acc +31
acc +10
acc -13
jmp +175
jmp +66
acc +34
acc +6
nop -126
acc +38
jmp +4
acc +18
jmp -13
jmp -8
jmp +1
acc -9
acc +31
nop +92
jmp +118
nop +21
jmp +110
acc +20
acc +20
jmp +280
jmp -142
jmp +8
nop -286
jmp +170
acc +22
acc +29
nop -127
jmp +36
jmp +328
acc +27
jmp -110
acc +28
acc +44
acc +34
acc +43
jmp -42
acc -19
jmp +185
acc -8
nop -3
acc +31
acc -11
jmp +142
acc +49
acc -2
acc +28
acc +17
jmp +167
acc +16
jmp +165
jmp -190
jmp -117
acc +0
acc +16
jmp +1
acc -10
jmp -39
jmp +69
jmp -187
nop -101
jmp +1
acc +12
jmp +218
acc -6
jmp -300
acc +10
jmp +104
jmp +1
acc +36
jmp -243
nop +138
acc -15
acc +13
nop +278
jmp -192
acc +13
jmp +275
acc +0
nop +92
nop +214
jmp -90
acc +44
nop +225
acc +9
jmp -348
acc +16
jmp -334
nop -335
acc -16
acc -9
jmp -89
acc +35
acc +2
acc +26
jmp +68
acc -19
acc +14
acc -19
acc -19
jmp +262
acc -16
nop -246
nop -251
acc +26
jmp +143
nop +48
acc +48
jmp +249
acc -8
jmp +9
acc +42
acc +12
acc +19
acc -4
jmp +213
acc +1
acc +29
jmp -259
acc +3
acc +17
acc -13
jmp -131
acc +16
acc -9
acc +28
jmp +222
acc +42
acc +20
acc -3
acc +50
jmp -339
jmp +1
acc +1
nop -315
acc +44
acc +50
jmp -143
nop -87
nop +155
jmp +1
nop +44
jmp +158
nop -10
acc +9
jmp +90
jmp +89
acc +27
acc -5
acc -8
acc +40
jmp +3
nop -360
jmp +117
acc -14
acc -16
nop -184
acc +20
jmp +185
acc -2
acc +36
nop +24
jmp +195
acc -8
acc -3
acc +7
jmp -84
acc +0
acc -12
acc +43
jmp -270
nop -434
acc -15
jmp +163
acc +14
jmp +29
acc +32
acc +26
acc +13
jmp -91
acc +30
jmp -163
nop +175
jmp -175
jmp +20
acc +0
nop -426
acc +22
acc -6
jmp -83
acc +12
acc +43
acc +31
jmp -46
acc +27
acc +26
acc +24
acc -12
jmp +118
nop -88
nop -251
acc -15
acc +3
jmp -450
acc +11
acc +19
jmp -406
acc +39
jmp -45
acc +40
acc -7
acc +22
nop -329
jmp -160
jmp +80
acc +0
acc -4
jmp +31
acc +11
acc -2
acc +3
acc +48
jmp -366
acc -16
jmp -345
jmp -259
acc -8
acc +29
acc +4
acc +2
jmp -208
acc -6
acc +48
acc -3
jmp +82
acc +1
acc +47
acc +40
acc +31
jmp -214
acc +10
jmp -328
acc -18
acc +39
jmp +2
jmp -403
jmp +48
jmp +19
jmp -468
jmp -397
acc +40
acc +39
acc +22
jmp +1
jmp -305
acc +22
acc -5
acc +23
jmp -399
acc +21
jmp +17
nop -239
acc +0
acc +29
acc +2
jmp -56
acc -14
acc +23
jmp -375
jmp -450
nop +1
jmp -29
jmp -208
nop +50
jmp -468
acc +3
jmp +5
jmp -347
acc +21
acc +35
jmp -527
acc -4
acc -14
acc -5
nop +24
jmp -418
jmp +66
acc +8
acc -16
jmp -447
nop -324
acc +27
acc +4
jmp -393
jmp -276
jmp +1
acc +37
acc +15
nop -304
jmp -534
acc -16
nop -514
acc +11
jmp -331
nop -69
acc +14
acc +44
jmp -125
acc +3
acc +5
acc +0
nop -381
jmp -440
acc +48
nop -561
jmp -543
acc -10
acc +44
acc -16
acc +45
jmp -177
acc +36
jmp -576
acc +36
acc +14
nop -323
jmp -163
jmp -118
acc -1
acc -14
acc +7
acc +7
jmp +11
acc +31
nop -309
jmp -109
acc +41
acc +11
acc +4
jmp -52
acc +9
acc +16
jmp -481
jmp -161
acc -8
acc +13
acc +16
jmp -488
acc +30
jmp -390
nop -313
jmp -333
jmp -44
acc +38
acc +33
acc +38
jmp -619
jmp -186
acc +49
acc -5
acc -16
jmp -214
acc +16
acc +35
nop -584
acc -12
jmp +1

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08/part1.js Normal file
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const fs = require('fs');
function parseLine(line) {
let [ op, offset ] = line.split(' ');
return { op: op, offset: Number(offset), visited: false };
}
fs.readFile('input', (err, data) => {
if (err) throw err;
let program = data.toString().split("\n").map( parseLine ).flat();
let acc = 0;
let pc = 0;
while (true) {
let insn = program[pc];
if (insn.visited) {
console.log(acc);
break;
}
insn.visited = true;
switch (insn.op) {
case 'nop':
pc++;
break;
case 'jmp':
pc = pc + insn.offset;
break;
case 'acc':
acc = acc + insn.offset;
pc++;
break;
}
}
});

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08/part2.js Normal file
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const fs = require('fs');
function parseLine(line) {
let [ op, offset ] = line.split(' ');
return { op: op, offset: Number(offset), visited: false };
}
function run(program) {
let acc = 0;
let pc = 0;
while(true) {
if (pc == program.length) {
return acc;
};
let insn = program[pc];
if (insn.visited) {
return undefined;
};
insn.visited = true;
switch (insn.op) {
case 'nop':
pc++;
break;
case 'jmp':
pc = pc + insn.offset;
break;
case 'acc':
acc = acc + insn.offset;
pc++;
break;
}
}
}
fs.readFile('input', (err, data) => {
if (err) throw err;
let program = data.toString().trim().split("\n").map( parseLine ).flat();
for(i=0; i<program.length; i++) {
let copy = JSON.parse(JSON.stringify(program))
let insn = copy[i];
if (insn.op == 'nop') {
insn.op = 'jmp';
} else if (insn.op == 'jmp') {
insn.op = 'nop';
} else {
continue; // If we don't make any changes, the program can't terminate
}
if (result = run(copy)) {
console.log(result);
return;
}
}
});