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function maxChunksToSorted(arr: number[]): number {    const stack = [] as number[];    for (const val of arr) {        if (!stack.length || stack[stack.length - 1] <= val) {            stack.push(val);        } else {            const temp = stack[stack.length - 1];            stack.pop();            while (stack[stack.length - 1] > val) {                stack.pop();            }            stack.push(temp);        }    }    return stack.length;}export default maxChunksToSorted;