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created 1_Two_sum.cpp #732

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16 changes: 16 additions & 0 deletions LeetCode Solutions/1_Two_sum.cpp
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Original file line number Diff line number Diff line change
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class Solution{
public:
vector<int> twoSum(vector<int>& nums, int target){
unordered_map<int,int>mp; //<value,index>
vector<int>res;
for(int i=0;i<nums.size();i++){
if(mp.count(nums[i])){ //if number is found in map
res.push_back(mp[nums[i]]);
res.push_back(i);
break;
}
mp[target-nums[i]]=i;
}
return res;
}
};