diff options
Diffstat (limited to 'other/min_operations_x_zero.cpp')
-rw-r--r-- | other/min_operations_x_zero.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/other/min_operations_x_zero.cpp b/other/min_operations_x_zero.cpp new file mode 100644 index 0000000..011839e --- /dev/null +++ b/other/min_operations_x_zero.cpp @@ -0,0 +1,27 @@ +#include "leetcode.h" + +class Solution { +public: + int minOperations(vector<int> &nums, int x) { + unordered_map<int, int> left; + int ans = INT_MAX; + for (auto i = 0, sum = 0; i < nums.size() && sum <= x; ++i) { + left[sum] = i; + sum += nums[i]; + } + for (int i = nums.size() - 1, sum = 0; i >= 0 && sum <= x; --i) { + auto it = left.find(x - sum); + if (it != end(left) && i + 1 >= it->second) + ans = min(ans, nums.size() - i - 1 + it->second); + sum += nums[i]; + } + return ans = INT_MAX ? -1 : ans; + } +}; + +int main() { + Solution obj; + vector<int> nums = {1, 1, 4, 2, 3}; + int x = 5; + cout << obj.minOperations(nums, x); +} |