/
index.ts
44 lines (34 loc) · 1.32 KB
/
index.ts
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import { readFileSync } from 'fs';
const file = 'src/Day1/input.txt';
const readFile = (filename: string): number[] => {
const fileContents = readFileSync(filename, 'utf-8');
return fileContents.split(/\r?\n/).map(Number);
};
const createNestedArr = (arr: number[]) => {
const emptyIndexNums: number[] = [];
arr.forEach((element, index) => {
if (element === 0) {
emptyIndexNums.push(index);
}
});
const nestedArr: number[][] = [];
emptyIndexNums.forEach((num, index) => {
const innerArr = arr.slice(index === 0 ? 0 : emptyIndexNums[index - 1] + 1, num);
nestedArr.push(innerArr);
});
return nestedArr;
};
const getHighestTotal = (nestedArr: number[][]) => {
const summedArr = nestedArr.map((innerArr) => innerArr.reduce((sum, num) => sum + num, 0));
return summedArr.reduce((a, b) => Math.max(a, b));
};
console.log('Highest: ', getHighestTotal(createNestedArr(readFile(file))));
/// PART TWO ///
const getThreeHighest = (nestedArr: number[][]) => {
const summedArr = nestedArr
.map((innerArr) => innerArr.reduce((sum, num) => sum + num, 0))
.sort((a, b) => a - b)
.reverse();
return summedArr.splice(0, 3).reduce((sum, num) => sum + num);
};
console.log('Three Highest:', getThreeHighest(createNestedArr(readFile(file))));