part2.ts

import * as fs from 'fs';

const input = fs
	.readFileSync('input', 'utf8')
	.split('\n')
	.map((x) => x.split('').map((y) => ({ height: +y })));

let result = 0;

for (let i = 0; i < input.length; i++) {
	for (let j = input[i].length - 1; j >= 0; j--) {
		let score = 0;
		let scoreSum = 1;

		for (let xi = i + 1; xi < input.length; xi++) {
			// to right
			score++;
			if (input[xi][j].height >= input[i][j].height) break;
		}
		scoreSum *= score;

		score = 0;
		for (let xi = i - 1; xi >= 0; xi--) {
			score++;
			if (input[xi][j].height >= input[i][j].height) break;
		}
		scoreSum *= score;

		score = 0;
		for (let xj = j + 1; xj < input[0].length; xj++) {
			score++;
			if (input[i][xj].height >= input[i][j].height) break;
		}
		scoreSum *= score;

		score = 0;
		for (let xj = j - 1; xj >= 0; xj--) {
			score++;
			if (input[i][xj].height >= input[i][j].height) break;
		}
		scoreSum *= score;

		result = Math.max(scoreSum, result);
	}
}

console.log(result);