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  1. #include <algorithm>
  2. #include <iostream>
  3. #include <cstring>
  4. #include <cstdlib>
  5. #include <cstdio>
  6. #include <cctype>
  7. #include <vector>
  8. #include <queue>
  9. #include <deque>
  10. #include <cmath>
  11. #include <set>
  12. #include <map>
  13. #include <string>
  14. #define ll long long
  15. #define ld long double
  16. #define sqr(a) (a)*(a)
  17. #define mp make_pair
  18. #define pb push_back
  19. #define pi pair<int,int>
  20. #define x first
  21. #define y second
  22. #define inf (int)1e9
  23. using namespace std;
  24. const int N=1000001;
  25. int n,m,x,t,l,r;
  26. int tree[N],a[N];
  27. void update(int i,int delta)
  28. {
  29.     for(;i<n;i=(i|(i+1)))
  30.         tree[i]+=delta;
  31. }
  32. int get(int r)
  33. {
  34.     int res=0;
  35.     for(;r>=0;r=(r&(r+1))-1)
  36.         res+=tree[r];
  37.     return res;
  38. }
  39.  
  40. int main()
  41. {
  42.     freopen("segmentupdate.in","r",stdin);
  43.     freopen("segmentupdate.out","w",stdout);
  44.     ios_base::sync_with_stdio(false);
  45.     cin.tie(NULL);
  46.     cin>>n>>m;
  47.     for(int i=0;i<n;i++)
  48.         cin>>a[i];
  49.     while(m--)
  50.     {
  51.         cin>>t;
  52.         if(t==1)
  53.         {
  54.             cin>>l>>r>>x;
  55.             l--,r--;
  56.             update(l,x);
  57.             update(r+1,-x);
  58.         }else {
  59.             cin>>x;
  60.             x--;
  61.             cout<<a[x]+get(x)<<"\n";
  62.             //printf("%d\n",a[x]+get(x));
  63.         }
  64.     }
  65.     return 0;
  66. }
  67.  
Runtime error #stdin #stdout #stderr 0s 11288KB
comments (?)
stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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terminate called after throwing an instance of 'std::ios_base::failure'
  what():  basic_filebuf::underflow error reading the file
https://ideone.com/zf1KRe
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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