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Submission #472026

# Submission time Handle Problem Language Result Execution time Memory
472026 2021-09-12T12:47:08 Z starplat Examination (JOI19_examination) C++14
100 / 100
 899 ms 26172 KB 
#include <bits/stdc++.h>
using namespace std;
int n,q,t[200005<<2],ct,ans[200005];
struct edge{
    int a,b,c,op,id;
}e[200005];
vector<int> v;
vector<edge> in,qu;
map<int,int> mp;
int cmp1(edge l,edge r)
{
    if (l.a!=r.a) return l.a>r.a;
    else return l.op<r.op;
}
int cmp2(edge l,edge r)
{
    if (l.b!=r.b) return l.b>r.b;
    else if (l.c!=r.c) return l.c<r.c;
    else return l.id<r.id;
}
void clean(int id,int x,int y)
{
    if (t[id]==0) return;
    t[id]=0;
    if (x!=y){
        int mid=(x+y)/2;
        clean(id*2,x,mid);
        clean(id*2+1,mid+1,y);
    }
}
void update(int id,int x,int y,int pos)
{
    if (x==y) t[id]++;
    else {
        int mid=(x+y)/2;
        if (pos<=mid) update(id*2,x,mid,pos);
        else update(id*2+1,mid+1,y,pos);
        t[id]=t[id*2+1]+t[id*2];
    }
}
int query(int id,int x,int y,int l,int r)
{
    if (l<=x&&y<=r) return t[id];
    if (x>r||y<l) return 0;
    int mid=(x+y)/2;
    return query(id*2,x,mid,l,r)+query(id*2+1,mid+1,y,l,r);
}
void check(int id,int x,int y)
{
	if (!t[id]) return;
	if (x!=y){
		int mid=(x+y)/2;
		check(id*2,x,mid);
		check(id*2+1,mid+1,y);
	}
}
void cdq(int l,int r)
{
    if (l>=r) return;
    int mid=(l+r)/2;
    cdq(l,mid);cdq(mid+1,r);
    in.clear();
    qu.clear();
    for (int i=l;i<=mid;i++) if (!e[i].op) in.push_back(e[i]);
    for (int i=mid+1;i<=r;i++) if (e[i].op) qu.push_back(e[i]);
    sort(in.begin(),in.end(),cmp2);
    sort(qu.begin(),qu.end(),cmp2);
    clean(1,1,ct);
    int pt=0;
    for (edge i:qu){
        while (pt<in.size()&&in[pt].b>=i.b){
            update(1,1,ct,in[pt].c);
            pt++;
        }
        ans[i.id]+=query(1,1,ct,i.c,ct);
    }
    //separate query and insert 
    //sweep insert and query like
    //doing task2126 hedgehog... algorithm 
    //to avoid query comes before insert
    //0 100 3 4
    //35 100 6 0
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    cin>>n>>q;
    for (int i=1;i<=n;i++){
        cin>>e[i].a>>e[i].b;
        e[i].c=e[i].a+e[i].b;
        e[i].op=0;
        v.push_back(e[i].c);
    }
    for (int i=n+1;i<=n+q;i++){
        cin>>e[i].a>>e[i].b>>e[i].c;
        e[i].op=1,e[i].id=i-n;
        v.push_back(e[i].c);
    }
    sort(v.begin(),v.end());
    for (int i:v) if(!mp[i]) mp[i]=++ct;
    for (int i=1;i<=n+q;i++) e[i].c=mp[e[i].c];
    sort(e+1,e+n+q+1,cmp1);
    cdq(1,n+q);
    for (int i=1;i<=q;i++) cout<<ans[i]<<"\n";
}

Compilation message

examination.cpp: In function 'void cdq(int, int)':
examination.cpp:71:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |         while (pt<in.size()&&in[pt].b>=i.b){
      |                ~~^~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 14 ms 1100 KB Output is correct
8 Correct 15 ms 1044 KB Output is correct
9 Correct 14 ms 1100 KB Output is correct
10 Correct 14 ms 1056 KB Output is correct
11 Correct 15 ms 972 KB Output is correct
12 Correct 7 ms 588 KB Output is correct
13 Correct 10 ms 844 KB Output is correct
14 Correct 10 ms 824 KB Output is correct
15 Correct 11 ms 828 KB Output is correct
16 Correct 8 ms 816 KB Output is correct
17 Correct 13 ms 972 KB Output is correct
18 Correct 5 ms 588 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 554 ms 15924 KB Output is correct
2 Correct 562 ms 15992 KB Output is correct
3 Correct 554 ms 15896 KB Output is correct
4 Correct 532 ms 14084 KB Output is correct
5 Correct 376 ms 14388 KB Output is correct
6 Correct 266 ms 10072 KB Output is correct
7 Correct 436 ms 16772 KB Output is correct
8 Correct 582 ms 15820 KB Output is correct
9 Correct 416 ms 16680 KB Output is correct
10 Correct 331 ms 13716 KB Output is correct
11 Correct 428 ms 14036 KB Output is correct
12 Correct 203 ms 8820 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 554 ms 15924 KB Output is correct
2 Correct 562 ms 15992 KB Output is correct
3 Correct 554 ms 15896 KB Output is correct
4 Correct 532 ms 14084 KB Output is correct
5 Correct 376 ms 14388 KB Output is correct
6 Correct 266 ms 10072 KB Output is correct
7 Correct 436 ms 16772 KB Output is correct
8 Correct 582 ms 15820 KB Output is correct
9 Correct 416 ms 16680 KB Output is correct
10 Correct 331 ms 13716 KB Output is correct
11 Correct 428 ms 14036 KB Output is correct
12 Correct 203 ms 8820 KB Output is correct
13 Correct 790 ms 18644 KB Output is correct
14 Correct 753 ms 18044 KB Output is correct
15 Correct 558 ms 15872 KB Output is correct
16 Correct 684 ms 16032 KB Output is correct
17 Correct 575 ms 16320 KB Output is correct
18 Correct 305 ms 10172 KB Output is correct
19 Correct 779 ms 18664 KB Output is correct
20 Correct 792 ms 18180 KB Output is correct
21 Correct 707 ms 19608 KB Output is correct
22 Correct 322 ms 13624 KB Output is correct
23 Correct 422 ms 13940 KB Output is correct
24 Correct 225 ms 8812 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 14 ms 1100 KB Output is correct
8 Correct 15 ms 1044 KB Output is correct
9 Correct 14 ms 1100 KB Output is correct
10 Correct 14 ms 1056 KB Output is correct
11 Correct 15 ms 972 KB Output is correct
12 Correct 7 ms 588 KB Output is correct
13 Correct 10 ms 844 KB Output is correct
14 Correct 10 ms 824 KB Output is correct
15 Correct 11 ms 828 KB Output is correct
16 Correct 8 ms 816 KB Output is correct
17 Correct 13 ms 972 KB Output is correct
18 Correct 5 ms 588 KB Output is correct
19 Correct 554 ms 15924 KB Output is correct
20 Correct 562 ms 15992 KB Output is correct
21 Correct 554 ms 15896 KB Output is correct
22 Correct 532 ms 14084 KB Output is correct
23 Correct 376 ms 14388 KB Output is correct
24 Correct 266 ms 10072 KB Output is correct
25 Correct 436 ms 16772 KB Output is correct
26 Correct 582 ms 15820 KB Output is correct
27 Correct 416 ms 16680 KB Output is correct
28 Correct 331 ms 13716 KB Output is correct
29 Correct 428 ms 14036 KB Output is correct
30 Correct 203 ms 8820 KB Output is correct
31 Correct 790 ms 18644 KB Output is correct
32 Correct 753 ms 18044 KB Output is correct
33 Correct 558 ms 15872 KB Output is correct
34 Correct 684 ms 16032 KB Output is correct
35 Correct 575 ms 16320 KB Output is correct
36 Correct 305 ms 10172 KB Output is correct
37 Correct 779 ms 18664 KB Output is correct
38 Correct 792 ms 18180 KB Output is correct
39 Correct 707 ms 19608 KB Output is correct
40 Correct 322 ms 13624 KB Output is correct
41 Correct 422 ms 13940 KB Output is correct
42 Correct 225 ms 8812 KB Output is correct
43 Correct 861 ms 25180 KB Output is correct
44 Correct 894 ms 25272 KB Output is correct
45 Correct 862 ms 25256 KB Output is correct
46 Correct 793 ms 23656 KB Output is correct
47 Correct 691 ms 23864 KB Output is correct
48 Correct 325 ms 10024 KB Output is correct
49 Correct 719 ms 26172 KB Output is correct
50 Correct 899 ms 25120 KB Output is correct
51 Correct 732 ms 25864 KB Output is correct
52 Correct 647 ms 23120 KB Output is correct
53 Correct 465 ms 16864 KB Output is correct