// your code goes here
function prefixSumArrCalc(arr, n) {
	let prefixSumArr = new Array(n);
	prefixSumArr[0] = arr[0];
	for(let i=1;i<n;i++){
		prefixSumArr[i] = prefixSumArr[i-1] + arr[i];
	}
	return prefixSumArr;
}
 
// console.log(prefixSumArrCalc([4, 2, 5, 1, 3], 5))
 
function suffixSumArrCalc(arr, n) {
	let suffixSumArr = new Array(n);
	suffixSumArr[n-1] = arr[n-1];
	for(let i=n-2;i>=0;i--){
		suffixSumArr[i] = suffixSumArr[i+1] + arr[i];
	}
	return suffixSumArr;
}
 
console.log(suffixSumArrCalc([4, 2, 5, 1, 3], 5))

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