Submission #383771

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
383771	2021-03-30 19:37:34	wind_reaper	Examination (JOI19_examination)	C++17	100 / 100	222 ms	7644 KiB

examination

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#include <bits/stdc++.h>
using namespace std;
struct BIT{
  vector<int> tree;
  int N;
  BIT(int _n){
    N = _n;
    tree.resize(N+1);
  }
  void upd(int pos, int val){
    for(++pos; pos <= N; pos += (pos & (-pos)))
      tree[pos] += val;
  }
  int que(int idx){
    int sum = 0;
    for(idx++; idx > 0; idx -= (idx & (-idx)))
      sum += tree[idx];
    return sum;
  }
};
int32_t main(){
  ios_base::sync_with_stdio(false); 
  cin.tie(NULL); 
  
  int n, q;
  cin >> n >> q;
 
 
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• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57