Array Manipulation - Hackerrank

arrayManipulation.ts

function arrayManipulation(n: number, queries: number[][]): number {
    const data: number[] = Array(n).fill(0);
    let maxValue: number = Number.MIN_VALUE;
    let sum: number = 0
    
    queries.forEach(([startIndex, endIndex, fillValue]) => {
        data[startIndex - 1] += fillValue
        
        if(data[endIndex] !== undefined) data[endIndex] -=  fillValue
    })
    
    data.forEach((value) => {
        sum += value
        maxValue = Math.max(sum, maxValue)
    })
    
    return maxValue;
}