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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define fastIO ios_base::sync_with_stdio(0); cin.tie(0);
  4. #define ll long long
  5. #define pb push_back
  6. #define all(x) x.begin(), x.end();
  7.  
  8. const ll LLINF = 1e18;
  9. const int INF = 1e9;
  10. const int N = 1e6+6;
  11.  
  12. int n, q;
  13. ll fen[N];
  14.  
  15.  
  16. void fenUpdate(int pos, int val){
  17.     for (int i=pos; i<=n; i += i&-i){
  18.         fen[i] += val;
  19.     }
  20. }
  21.  
  22. ll fenGet(int pos){
  23.     ll ans = 0;
  24.     for (int i=pos; i>0; i -= i&-i){
  25.         ans += fen[i];
  26.     }
  27.     return ans;
  28. }
  29.  
  30. void fenUpdateRange(int l, int r, int val){
  31.     fenUpdate(l, val);
  32.     fenUpdate(r+1, -val);
  33. }
  34.  
  35. int main(){
  36.     fastIO;
  37.  
  38.     cin >> n;
  39.     for (int i=1; i<=n; i++){
  40.         int x;
  41.         cin >> x;
  42.         fenUpdateRange(i, i, x);
  43.     }
  44.     cin >> q;
  45.     while (q--){
  46.         int type;
  47.         cin >> type;
  48.         if (type==1){
  49.             int l, r, val;
  50.             cin >> l >> r >> val;
  51.             fenUpdateRange(l, r, val);
  52.         }
  53.         else{
  54.             int pos;
  55.             cin >> pos;
  56.             cout << fenGet(pos) << '\n';
  57.         }
  58.     }
  59.     return 0;
  60. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/JRDJh1
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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