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  1. #include <bits/stdc++.h>
  2. using namespace std; 
  3. #define fastio ios_base::sync_with_stdio(false) ; cin.tie(NULL); cout.tie(NULL)
  4.  
  5. const int N = 3e4+5 , Q = 2e5+5; 
  6. int n , ft[N] , a[N];
  7. pair<int,int> b[N] ;  
  8. int ans[Q] ;
  9. int lsO(int x ){
  10.     return (x&(-x)); 
  11. }
  12. int sum(int x){
  13.     int s = 0 ; 
  14.     for( ; x > 0 ; x -= lsO(x)) s+= ft[x]; 
  15.     return s ; 
  16. }
  17. void update(int x  ){
  18.     for( ; x <= n ; x += lsO(x)  )ft[x] ++ ; 
  19. }
  20.  
  21. int main(){
  22. // fastio ; 
  23. // cin >> n ;  
  24. scanf("%d",&n); 
  25. for(int i = 1 ; i <= n ; i++ ){
  26.     scanf("%d",a+i) ;
  27.     b[i] = {a[i],i}; 
  28. }
  29. int q , l , r , k ; 
  30. // cin >> q; 
  31. scanf("%d",&q); 
  32. vector<vector<int>> queries ; 
  33. for(int i = 0 ; i < q ; i++ ){
  34.     // cin >> l >> r >> k ;
  35.     scanf("%d%d%d",&l,&r,&k);  
  36.     queries.push_back( {k,l,r,i}); 
  37. }
  38.  
  39. sort(queries.begin(),queries.end()); 
  40. sort(b+1,b+n+1) ; 
  41. int j = n ; 
  42. for(int i = q-1 ; i >= 0 ; i-- ){   
  43.     while( j >= 1 && b[j].first > queries[i][0]){
  44.         update(b[j].second) ;
  45.         j--;  
  46.     }ans[queries[i][3]] = sum(queries[i][2])-sum(queries[i][1]-1)   ; 
  47. }for(int i = 0 ; i < q ; i++ ){
  48.     //cout << ans[i]<<endl;
  49.     printf("%d\n",ans[i]); 
  50. }
  51. }
  52.  
  53.  
Runtime error #stdin #stdout 0.02s 8308KB
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https://ideone.com/tq7DZA
problem KQUERY, based on SPOJ submission 24202635 (CPP14), 2019-08-07 13:06:34
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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