part2.ts

import * as fs from 'fs';

const input = fs
	.readFileSync('input', 'utf8')
	.split('\n')
	.map((x) => x.split(' '));

const winMap = { A: 'B', B: 'C', C: 'A' };
const loseMap = { A: 'C', B: 'A', C: 'B' };
const scoreMap = { A: 1, B: 2, C: 3 };

let result = 0;

for (const [opponent, win] of input) {
	if (win === 'X') {
		result += scoreMap[loseMap[opponent]];
	} else if (win === 'Y') {
		result += scoreMap[opponent] + 3;
	} else {
		result += scoreMap[winMap[opponent]] + 6;
	}
}

console.log(result);