34 lines
791 B
C++
34 lines
791 B
C++
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#include <cassert>
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#include <unordered_set>
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#include <vector>
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class Solution {
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public:
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std::vector<int> findErrorNums(const std::vector<int> &nums) {
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int expected_sum = nums.size() * (1 + nums.size()) / 2;
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int sum = 0;
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int unique_sum = 0;
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std::unordered_set<int> seen;
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seen.reserve(nums.size());
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for (const int x : nums) {
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sum += x;
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if (!seen.contains(x)) {
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unique_sum += x;
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}
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seen.insert(x);
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}
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return {sum - unique_sum, expected_sum - unique_sum};
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}
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};
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int main() {
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Solution s;
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assert((s.findErrorNums(std::vector{1, 2, 2, 4}) == std::vector{2, 3}));
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assert((s.findErrorNums(std::vector{1, 1}) == std::vector{1, 2}));
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return 0;
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}
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