class Solution {
public:
vector[HTML_REMOVED] twoSum(vector[HTML_REMOVED]& nums, int target) {
unordered_map[HTML_REMOVED]hash;
for(int i=0;i<nums.size();i++){
auto c=target-nums[i];
if(hash.count(c)) return {i,hash[c]};
hash[nums[i]]=i;
}
return {-1,-1};
}
};