2270. Number of Ways to Split Array #1064
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mah-shamim
mah-shamim
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Q&A
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Topics: You are given a 0-indexed integer array
Return the number of valid splits in Example 1:
Example 2:
Constraints:
Hint:
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Answered by
mah-shamim
Jan 3, 2025
Replies: 1 comment 2 replies
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We can approach it using the following steps: Approach:
Let's implement this solution in PHP: 2270. Number of Ways to Split Array <?php
/**
* @param Integer[] $nums
* @return Integer
*/
function waysToSplitArray($nums) {
$n = count($nums);
$totalSum = array_sum($nums);
$prefixSum = 0;
$validSplits = 0;
// Iterate over the array and check for valid splits
for ($i = 0; $i < $n - 1; $i++) {
$prefixSum += $nums[$i];
$remainingSum = $totalSum - $prefixSum;
// Check if the prefix sum is greater than or equal to the remaining sum
if ($prefixSum >= $remainingSum) {
$validSplits++;
}
}
return $validSplits;
}
// Example usage:
$nums1 = [10, 4, -8, 7];
echo waysToSplitArray($nums1); // Output: 2
$nums2 = [2, 3, 1, 0];
echo waysToSplitArray($nums2); // Output: 2
?> Explanation:
Time Complexity:
Space Complexity:
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Answer selected by
topugit
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We can approach it using the following steps:
Approach:
i+1
elements.i+1
elements.i
(where0 <= i < n-1
), we check if the sum of the firsti+1
elements is greater than or equal to the sum of the lastn-i-1
elements.Let's implement this solution …