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  1. // ROOT : DRAGON3012009 : Wa In Real Life
  2. #include <bits/stdc++.h>
  3. #define ll long long
  4. #define el "\n"
  5. #define _ROOT_ int main()
  6. #define FOR(i,l,r) for(int i = l ; i <= r ; i ++)
  7. #define FORD(i,r,l) for(int i = r ; i >= l ; i --)
  8. #define REP(i, a ) for(int i = 0 ; i < a ; i ++ )
  9. #define fi first
  10. #define se second
  11. #define M 1000000007
  12. #define MAXN 1000001
  13. #define INF (1ll<<60)
  14. #define NAME "file"
  15. #define compare(v) sort((v).begin(), (v).end()); (v).erase(unique((v).begin(), (v).end()), (v).end());
  16. using namespace std;
  17. const ll MOD[] = {(ll)1e9 + 2277, (ll)1e9 + 5277, (ll)1e9 + 8277, (ll)1e9 + 9277, (ll) 1e9 + 7 };
  18. const ll NMOD = 1;
  19.  
  20. ll n, q ;
  21. ll a[MAXN];
  22. ll lab[MAXN ] ;
  23. bool active[MAXN ] ;
  24. ll ans ;
  25. vector<ll> cpr ;
  26.  
  27. ll find_set(ll a )
  28. {
  29.     return lab[a] < 0 ? a : lab[a] = find_set(lab[a]) ;
  30. }
  31.  
  32. bool union_set(ll a, ll b )
  33. {
  34.     if(!active[a]) return false ;
  35.     if(!active[b]) return false ;
  36.     a = find_set(a) ;
  37.     b = find_set(b) ;
  38.     if(a == b ) return false ;
  39.     if(lab[a] > lab[b]) swap(a, b ) ;
  40.     ans -= (-lab[a] + 1 ) / 2 ;
  41.     ans -= (-lab[b] + 1 ) / 2 ;
  42. //    cout << a << " " << b << " " << ans << " data " << el ;
  43.     lab[a] += lab[b] ;
  44.     ans += (-lab[a]  + 1 ) / 2 ;
  45.     lab[b] = a ;
  46.     return true ;
  47. }
  48.  
  49.  
  50. void init()
  51. {
  52.     cin >> n ;
  53.     FOR(i, 1, n ) cin >> a[i] ;
  54. }
  55.  
  56. void solve()
  57. {
  58.     memset(lab , - 1 , sizeof lab ) ;
  59.     FOR(i , 1 , n ) {
  60.     if(active[a[i]] == false ) ans ++ ;
  61.     active[a[i]] = true ;
  62.  
  63.     union_set(a[i] , a[i] - 1 ) ;
  64.     union_set(a[i] , a[i] + 1 ) ;
  65.     cout << ans << " " ;
  66.     }
  67. }
  68.  
  69. _ROOT_
  70. {
  71.     // freopen(NAME".inp" , "r" , stdin);
  72.     // freopen(NAME".out" , "w", stdout) ;
  73.     ios_base::sync_with_stdio(0);
  74.     cin.tie(0);
  75.     cout.tie(0);
  76.     int t = 1; // cin >> t ;
  77.     while(t--)
  78.     {
  79.         init();
  80.         solve();
  81.     }
  82.     return (0&0);
  83. }
  84.  
Success #stdin #stdout 0.01s 11968KB
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https://ideone.com/RylgCF
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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