diff options
-rw-r--r-- | count_subarr_score_less_k.c | 26 | ||||
-rw-r--r-- | count_subarr_score_less_k.py | 31 |
2 files changed, 57 insertions, 0 deletions
diff --git a/count_subarr_score_less_k.c b/count_subarr_score_less_k.c new file mode 100644 index 0000000..5c454d1 --- /dev/null +++ b/count_subarr_score_less_k.c @@ -0,0 +1,26 @@ +// 2302. Count Subarrays With Score Less Than K +#include "leetcode.h" + +/* + * the score of an array is defined as the product of its sum and its length. + * given a positive integer array 'nums' and an integer 'k', return the number + * of non-empty subarrays of 'nums' whose score is strictly less than 'k'. a + * subarray is a contiguous sequence of elements within an array. + */ + +long long countSubarrays(int *nums, int numsSize, long long k) { + long long ans = 0, curr = 0; + for (int j = 0, i = 0; j < numsSize; ++j) { + curr += nums[j]; + while (curr * (j - i + 1) >= k) + curr -= nums[i++]; + ans += j - i + 1; + } + return ans; +} + +int main() { + int n1[] = {2, 1, 4, 3, 5}, n2[] = {1, 1, 1}; + printf("%lld\n", countSubarrays(n1, ARRAY_SIZE(n1), 10)); // expect: 6 + printf("%lld\n", countSubarrays(n2, ARRAY_SIZE(n2), 5)); // expect: 5 +} diff --git a/count_subarr_score_less_k.py b/count_subarr_score_less_k.py new file mode 100644 index 0000000..d60cb4b --- /dev/null +++ b/count_subarr_score_less_k.py @@ -0,0 +1,31 @@ +# 2302. Count Subarrays With Score Less Than K + +""" +the score of an array is defined as the product of its sum and its length. +given a positive integer array 'nums' and an integer 'k', return the number +of non-empty subarrays of 'nums' whose score is strictly less than 'k'. a +subarray is a contiguous sequence of elements within an array. +""" + + +class Solution(object): + def countSubarrays(self, nums, k): + """ + :type nums: List[int] + :type k: int + :rtype: int + """ + ans, curr, i = 0, 0, 0 + for j in range(len(nums)): + curr += nums[j] + while curr * (j - i + 1) >= k: + curr -= nums[i] + i += 1 + ans += j - i + 1 + return ans + + +if __name__ == "__main__": + obj = Solution() + print(obj.countSubarrays(nums=[2, 1, 4, 3, 5], k=10)) + print(obj.countSubarrays(nums=[1, 1, 1], k=5)) |