1.js

const input = '174, 180, 179, 186, 184, 176, 177, 190, 173, 174, 176, 175, 172, 175, 174, 175, 176, 179, ' +
    '206, 207, 206, 205, 208, 209, 215, 221, 228, 227, 214, 215, 216, 218, 244, 246, 242, 249, 250, 253, ' +
    '259, 256, 261, 256, 252, 254, 256, 261, 274, 270, 300, 301, 308, 310, 308, 305, 306, 300, 292, 290, ' +
    '296, 295, 298, 301, 303, 304, 305, 302, 301, 282, 280, 281, 279, 302, 285, 278, 288, 302, 306, 308, ' +
    '314, 319, 324, 320, 324, 326, 296, 297, 309, 316, 315, 327, 328, 341, 339, 338, 329, 330, 328, 330, ' +
    '328, 327, 336, 332, 330, 331, 336, 338, 342, 358, 360, 369, 371, 378, 380, 385, 382, 381, 383, 417, ' +
    '421, 422, 424, 425, 426, 454, 455, 457, 467, 499, 507, 513, 507, 513, 512, 509, 500, 501, 508, 507, ' +
    '509, 512, 529, 530, 529, 530, 529, 518, 526, 523, 518, 521, 484, 479, 478, 489, 476, 477, 478, 495, ' +
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array = input.split(', ').map(s => parseInt(s));

function increasify(a) {return a.map((num, index,a) => index === 0 ? false : a[index] > a[index -1])}

let sums = [];
for(let i = 0; i < array.length - 1; i++) {
    let sum = array.slice(i, i+3);
    sums.push(sum.reduce((t,n) => t+n))
}

let increases = increasify(sums)

let dict = {
    increase: 0,
    decrease: 0
}

console.log(sums.length)

increases.forEach(b => b ? dict.increase++ : dict.decrease++)

console.log(dict)