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def fib(n):
# Base case
if n <= 1:
return n
# Recursive step
return fib(n-1) +
fib(n-2)
fib(5)
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class Solution {
public:
vector<int> twoSum(vector<int>& nums, int target) {
unordered_map<int, int> mp;
for (int i = 0; i < nums.size(); i++) {
int complement = target - nums[i];
if (mp.find(complement) != mp.end()) {
return {mp[complement], i};
}
mp[nums[i]] = i;
}
return {};
}
};