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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int n,m;
- cin>>n>>m;
- int arr[n];
- unordered_map<int,int> M;
- for(int i=0;i<n;i++)
- {
- cin>>arr[i];
- M[arr[i]]++;
- }
- bool ans=0;
- for(int i=0;i<n;i++)
- {
- if(m=2*arr[i] && M[arr[i]]>1) ans=1;
- else if(M[m-arr[i]]) ans=1;
- }
- cout<<ans;
- }
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