Submission #259518

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
259518	2020-08-08 00:34:07	ChrisT	Examination (JOI19_examination)	C++17	100 / 100	403 ms	40156 KiB

examination

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
using namespace std;
const int MN = 2e5 + 5;
int ans[MN], bit[MN];
vector<int> xs;
void getx (int &x) {x = lower_bound(xs.begin(),xs.end(),x) - xs.begin() + 1;}
void inc (int i) {
  for (i=MN-i;i<MN;i+=i&-i) ++bit[i];
}
void dec (int i) {
  for (i=MN-i;i<MN;i+=i&-i) --bit[i];
}
int query (int i) {
  int ret = 0;
  for (i=MN-i;i;i^=i&-i) ret += bit[i];
  return ret;
}
struct Event {
  int x,y,z,id;
};
void cdq (int l, int r, vector<Event> &events) { //over z
  if (events.empty()) return;
  if (l==r) {
    for (Event &e : events) {
      if (e.id<0)inc(e.y);
      else ans[e.id] += query(e.y);
    }
    for (Event &e : events) if (e.id<0) dec(e.y);
    return;
  }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

examination.cpp: In function 'int main()':
examination.cpp:50:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d %d",&n,&q);
  ~~~~~~^~~~~~~~~~~~~~~
examination.cpp:54:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf ("%d %d",&s,&t); xs.push_back(t);
   ~~~~~~^~~~~~~~~~~~~~~
examination.cpp:59:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf ("%d %d %d",&x,&y,&z); xs.push_back(y);
   ~~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57