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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. using ll =long long;
  4.  
  5. int main() {
  6. 	// your code goes here
  7. 	ll n,k;
  8. 	cin>>n>>k;
  9. 	vector<ll>a(n);
  10. 	for(ll i=0;i<n;i++) cin>>a[i];
  11. 	unordered_map<ll,ll> pos;
  12. 	pos[a[0]]=0;
  13. 	ll mini=LLONG_MAX;
  14. 	for(ll i=1;i<n;i++){
  15. 		ll req=k-a[i];
  16. 		if(pos.count(req)){
  17. 			ll sz=i-pos[req]+1;
  18. 			mini=min(mini,sz);
  19. 		}
  20. 		if(!pos.count(a[i]))
  21. 		pos[a[i]]=i;
  22. 	}
  23. 	cout<<mini<<endl;
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 5320KB
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stdin
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8 8
5 6 7 8 10 4 3 2 1
stdout
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7
https://ideone.com/iwHqaJ
language:
C++14 (gcc 8.3)
created:
23 hours ago
visibility:
public

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