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  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. const int maxn=2e5+5;
  6.  
  7. int n;
  8. long long x,a[maxn];
  9.  
  10. int main(){
  11.     //freopen("tong2so.inp","r",stdin);
  12.     //freopen("tong2so.out","w",stdout);
  13.     cin >> n >> x;
  14.     map<long long,long long>m;
  15.     for(int i=1;i<=n;i++){
  16.         cin >> a[i];
  17.         m[a[i]]=i;
  18.     }
  19.     sort(a+1,a+n+1);
  20.     for(int i=1;i<=n;i++){
  21.         if(binary_search(a+1,a+n+1,x-a[i])){
  22.             cout << min(m[a[i]],m[x-a[i]]) << " " << max(m[a[i]],m[x-a[i]]);
  23.             return 0;
  24.         }
  25.     }
  26.     cout << "IMPOSSIBLE";
  27. }
Success #stdin #stdout 0s 5252KB
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stdin
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Standard input is empty
stdout
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IMPOSSIBLE
https://ideone.com/HeLydO
language:
C++ (gcc 8.3)
created:
237 days ago
visibility:
public

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