Contains Duplicate III

class Solution {
public:
bool containsNearbyAlmostDuplicate(vector<int>& nums, int k, int t) {
vector<pair<long, long>> res;
for(int i=0; i<nums.size(); i++)
res.push_back(make_pair(nums[i],i));

sort(res.begin(), res.end());

for(int j=0; j<nums.size(); j++)
{
int most = j+1;
while(most<nums.size() && res[most].first-res[j].first<=t)
{
if(abs(res[most].second-res[j].second) <= k)
return true;
most++;
}

}
return false;
}
};