#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
 
	vector<int> nums(n,0);
	for(int i = 0;i<n; i++){
		cin>>nums[i];
	}
 
	int k;
	cin>>k;
 
	unordered_map<int,int> mpp;
	vector<int>ans;
	for(int i = 0; i<n;i++){
		if(mpp.find(k - nums[i])!=mpp.end()){
			ans.push_back(mpp[k - nums[i]]);
			ans.push_back(i);
			break;
		}
 
		mpp[nums[i]] = i;
	}
 
	for(int i = 0;i<ans.size();i++){
		cout<<ans[i]<<" ";
	}
	return 0;
}

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NQoxCjIKMwo0Cjc=

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