aoc-1.cpp

#include <fstream>
#include <iostream>
#include <vector>

bool isIn(const int& x, const std::vector<int>& xs)
{

  int size = (int)xs.size();
  for(int i = 0; i < size; ++i) {
    if(x == xs[i]) {
      return true;
    }
  }

  return false;
}

int main() 
{
  std::ifstream inFile;

  std::vector<int> xsv;
  int x;
  
  inFile.open("aoc-input-1");
  while(inFile >> x) {
    xsv.push_back(x);
  }
  inFile.close();

  int xsSize = xsv.size();
  int xs[xsSize];
  std::copy(xsv.begin(), xsv.end(), xs);

  std::vector<int> results;

  int i = -1;
  int lastRes = 0;
  do {
    i = (i + 1) % xsSize;

    results.push_back(lastRes);
    lastRes += xs[i];

    //std::cout << 
    //  results.size() << ", " << lastRes
    //<< std::endl;
  } while(!isIn(lastRes, results));

  std::cout << lastRes << std::endl;

  return 0;
}

aoc-1.js

const fs = require('fs');

const freqs = fs.readFileSync('aoc-input-1', 'utf-8').trim().split('\n').map(Number);
const res = [];

let i = -1;
let lastRes = 0;

do {
  i = (i + 1) % freqs.length;

  //console.log(res.length, lastRes);

  res.push(lastRes);
  lastRes += freqs[i];
} while (!res.includes(lastRes));

console.log(lastRes);

aoc-input-1

+2
+11
+4
-16
-4
+15
+19
-8
-17
+12
+8
+8
+18
-10
-17
-6
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+19
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+12
-17
+4
-1
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+6
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+6
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+2
+19
-7
-15
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-12
-15
-18
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+8
+4
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+1
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-6
-6
+13
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-2
+1
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-12
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+7
-14
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-16
+6
-12
-11
-12
-1
-15
-8
-18
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-7
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+2
+17
-9
-15
-11
-8
+16
+17
-6
+13
+16
-20
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+8
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+5
+11
-5
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+3
-7
-5
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+4
-3
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-6
-18
-23
-2
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-4
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-4
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+1
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-21
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-8
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-3
-10
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-12
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-1
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-1
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+3
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+1
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-1
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+9
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-2
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-1
-3
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-3
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-12
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-1
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-7
-10
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-11
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-13
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-13
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+3
-22
-13
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-10
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-19
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-5
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-2
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-29
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-38
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-47
-6
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-4
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-18
-1
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-4
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-26
-25
-16
-6
-8
-7
+8
-77371