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-rw-r--r--other/find_orig_array_double.cpp19
1 files changed, 19 insertions, 0 deletions
diff --git a/other/find_orig_array_double.cpp b/other/find_orig_array_double.cpp
new file mode 100644
index 0000000..a434616
--- /dev/null
+++ b/other/find_orig_array_double.cpp
@@ -0,0 +1,19 @@
+#include "leetcode.h"
+
+class Solution {
+public:
+ vector<int> findOriginalArray(vector<int> &changed) {
+ int count[100001] = {}, i = 0;
+ vector<int> ans;
+ for (auto n : changed)
+ ++count[n];
+ for (int i = 0; i <= 50000; ++i)
+ if (count[i]) {
+ if (--count[i * 2] < 0 || --count[i] < 0)
+ return {};
+ ans.push_back(i--);
+ }
+ return accumulate(begin(count) + 50000, end(count), 0ll) ? vector<int>()
+ : ans;
+ }
+};