// 2444. Count Subarrays With Fixed Bounds #include "leetcode.h" /* * given an integer array 'nums' and two integer 'mink' and 'maxk'. a fixed * bound subarray of 'nums' is a subarray that satisfies the following * conditions. the minimum value in the subarray is equal to 'mink' and the * maximum value in the subarray is equal to 'maxk'. return the number of fixed * bound subarrays. a subarray is a contiguous part of an array. */ long long countSubarrays(int *nums, int numsSize, int minK, int maxK) { long long ans = 0; int last_min = -1, last_max = -1, start = 0; for (int i = 0; i < numsSize; i++) { if (nums[i] > maxK || nums[i] < minK) start = i + 1; if (nums[i] == maxK) last_max = i; if (nums[i] == minK) last_min = i; int pos = fmin(last_max, last_min); if (start > pos) continue; ans += pos - start + 1; } return ans; } int main() { int n1[] = {1, 3, 5, 2, 7, 5}, n2[] = {1, 1, 1, 1}; printf("%lld\n", countSubarrays(n1, ARRAY_SIZE(n1), 1, 5)); // expect: 2 printf("%lld\n", countSubarrays(n2, ARRAY_SIZE(n2), 1, 1)); // expect: 10 }