C++示例程序:
class Solution {
public:
vector<int> twoSum(vector<int>& nums, int target) {
int length = nums.size();
vector<int> result;
unordered_map<int, int> um;
for (int i = 0; i < length; i++) {
for (int j = i + 1; j < length; j++) {
if (nums[i] + nums[j] == target) {
result.push_back(i);
result.push_back(j);
}
}
}
return result;
}
};