diff options
Diffstat (limited to 'num_bad_pairs.cpp')
-rw-r--r-- | num_bad_pairs.cpp | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/num_bad_pairs.cpp b/num_bad_pairs.cpp deleted file mode 100644 index 75ea430..0000000 --- a/num_bad_pairs.cpp +++ /dev/null @@ -1,27 +0,0 @@ -#include "leetcode.h" - -/* - * given: 0-indexed integer array - * bad pair: (i, j) if - * i < j && j - i != nums[j] - nums[i] - */ - -class Solution { -public: - long long countBadPairs(vector<int> &nums) { - long long ans = 0; - unordered_map<int, int> um; - for (int i = 0; i < nums.size(); ++i) { - ans += (long long)i - um[nums[i] - i]; - ++um[nums[i] - i]; - } - return ans; - } -}; - -int main() { - Solution obj; - vector<int> nums1 = {4, 1, 3, 3}, nums2 = {1, 2, 3, 4, 5}; - cout << obj.countBadPairs(nums1) << endl; // expect: 5 - cout << obj.countBadPairs(nums2) << endl; // expect: 0 -} |