import { readFileSync } from 'fs';
import { join } from 'path';

function findNDupes(inputArrays): string {
  var countMap = {};
  for (const inputArray of inputArrays) {
    const s = new Set<string>(inputArray);
    s.forEach(function(val){
        if (val in countMap) {
          countMap[val] += 1;
        } else {
          countMap[val] = 1;
        }
    });
  }

  for (const key in countMap) {
    if (countMap[key] == inputArrays.length) {
      return key;
    }
  }
}

const fileString = readFileSync(join(__dirname, "inp"), 'utf-8');
const rucksacks = fileString.split("\n");

var sum: number = 0;

for (const rucksack of rucksacks) {
  if (rucksack.length == 0) {
    continue;
  }
  const items = rucksack.split('');
  const firstHalf = items.slice(0, items.length/2);
  const secondHalf = items.slice(items.length/2, items.length);
  const ndup = findNDupes([firstHalf, secondHalf])

  const s = new Set<string>(ndup);
  s.forEach(function(val){
    const charNum = val.charCodeAt(0);
    if (charNum > 96) {
      sum += charNum - 96;
    } else {
      sum += charNum - 38;
    }
  });
}

console.log(sum);


sum = 0;

for (var i = 0; i < rucksacks.length; i += 3) {
  if (i + 1 >= rucksacks.length) {
    continue;
  }
  const r1 = rucksacks[i].split('');
  const r2 = rucksacks[i+1].split('');
  const r3 = rucksacks[i+2].split('');
  
  const ndup = findNDupes([r1, r2, r3])
  const s = new Set<string>(ndup);
  s.forEach(function(val){
    const charNum = val.charCodeAt(0);
    if (charNum > 96) {
      sum += charNum - 96;
    } else {
      sum += charNum - 38;
    }
  });
}
console.log(sum);