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Submission #623308

# Submission time Handle Problem Language Result Execution time Memory
623308 2022-08-05T12:38:18 Z Iwanttobreakfree Examination (JOI19_examination) C++17
43 / 100
 3000 ms 43852 KB 
#include <iostream>
#include <vector>
#include <unordered_map>
#include <cmath>
#include <algorithm>
#include <set>
using namespace std;
#define pii pair<int,int>
unordered_map<int,int> mp_m,mp_i,mp_a,av;
vector<int> BIT,cnt;
int sz=700,n,q;
int next(int x){return x + (x&(-x));}
int par(int x){return x - (x&(-x));}
bool cmp(pair<int,pair<pii,pii>>& a,pair<int,pair<pii,pii>>& b){
    if(a.first!=b.first)return a.first<b.first;
    if(a.first&1)return a.second.first.second<b.second.first.second;
    return a.second.first.second>b.second.first.second;
}
int bin_find(int x,vector<int>& v){
    int l=0,r=v.size()-1,ans=v.size();
    while(l<=r){
        int mid=(r+l)/2;
        if(v[mid]<x)l=mid+1;
        else {
            ans=mid;
            r=mid-1;
        }
    }
    return ans;
}
void pupd(int x,int k){
    //cout<<x<<' '<<k<<'\n';
    for(int i=x;i<BIT.size();i=next(i))BIT[i]+=k;
}
int sum(int x){
    int ans=0;
    for(int i=x;i>0;i=par(i)){
        ans+=BIT[i];
        //cout<<i<<' '<<BIT[i]<<'\n';
    }
    return ans;
}
int val(int l,int r){
    return sum(r)-sum(l);
}
void add(int i,vector<vector<int>>& g,vector<int>& exam){
    //cout<<i<<' ';
    for(int x:g[i]){
        cnt[x]++;
        if(cnt[x]==2){
            pupd(mp_a[exam[x]]+1,+1);
        }
    }
    //cout<<ans<<' '<<'\n';
}
void del(int i,vector<vector<int>>& g,vector<int>& exam){
    //cout<<i<<' ';
    for(int x:g[i]){
        if(cnt[x]==2){
            pupd(mp_a[exam[x]]+1,-1);
        }
        cnt[x]--;
    }
    //cout<<ans<<'\n';
}
vector<vector<int>> math,info;
void MO(vector<int>& m,vector<int>& in,vector<int>& av,vector<int>& exam,vector<int>& id){
    int x,y,z;
    vector<pair<int,pair<pii,pii>>> qu(q);
    vector<int> answer(q);
    for(int i=0;i<q;i++){
        cin>>x>>y>>z;
        x=bin_find(x,m);
        y=bin_find(y,in);
        z=bin_find(z,av);
        //cout<<x<<' '<<y<<' '<<z<<' '<<id[x]<<'\n';
        qu[i]={id[x],{{x,y},{z,i}}};
    }
    sort(qu.begin(),qu.end(),cmp);
    int l_math=m.size(),l_info=in.size();
    for(int i=0;i<q;i++){
        int min_math=qu[i].second.first.first,min_info=qu[i].second.first.second,min_av=qu[i].second.second.first;
        //cout<<min_math<<' '<<min_info<<'\n';
        if(min_av==av.size()){
            answer[qu[i].second.second.second]=0;
            continue;
        }
        //cout<<l_math<<' '<<l_info<<'\n';
        while(l_math>min_math){
            l_math--;
            add(l_math,math,exam);
        }
        while(l_math<min_math){
            del(l_math,math,exam);
            l_math++;
        }
        //cout<<l_math<<' '<<l_info<<'\n';
        while(l_info>min_info){
            l_info--;
            //cout<<l_info<<' ';
            add(l_info,info,exam);
        }
        //cout<<l_info<<' ';
        while(l_info<min_info){
            del(l_info,info,exam);
            l_info++;
        }
        //cout<<l_math<<' '<<l_info<<' '<<qu[i].second.second<<' '<<ans<<' '<<sum(min_av)<<'\n';
        answer[qu[i].second.second.second]=val(min_av,BIT.size()-1);
    }
    for(int i=0;i<q;i++)cout<<answer[i]<<'\n';
}
int main(){
    cin.tie(0);
    cout.tie(0);
    ios::sync_with_stdio(false);
    int x,y;
    cin>>n>>q;
    set<int> m,in,av;
    cnt=vector<int>(n);
    vector<int> exam_math(n),exam_info(n),exam_av(n),a,b,c;
    for(int i=0;i<n;i++){
        cin>>x>>y;
        m.insert(x);
        in.insert(y);
        av.insert((x+y));
        exam_math[i]=x;
        exam_info[i]=y;
        exam_av[i]=(x+y);
    }
    mp_m.reserve(131072);
    mp_i.reserve(131072);
    mp_a.reserve(131072);
    int cntm=0,cnti=0,cnta=0;
    for(int x:m){
        mp_m[x]=cntm;
        cntm++;
        a.emplace_back(x);
    }
    for(int x:in){
        mp_i[x]=cnti;
        cnti++;
        b.emplace_back(x);
    }
    for(int x:av){
        mp_a[x]=cnta;
        cnta++;
        c.emplace_back(x);
    }
    BIT=vector<int> (cnta+1);
    math=vector<vector<int>> (cntm,vector<int>());
    info=vector<vector<int>> (cnti,vector<int>());
    for(int i=0;i<n;i++){
        math[mp_m[exam_math[i]]].emplace_back(i);
        info[mp_i[exam_info[i]]].emplace_back(i);
    }
    vector<int> id(cntm+1);
    int cur=0,cont=2e6;
    for(int i=0;i<math.size();i++){
        if(math[i].size()>=sz){
            cont--;
            id[i]=cont;
            cont--;
            cur=0;
        }else if(math[i].size()+cur>sz){
            cur=0;
            id[i]=cont;
            cont--;
        }else{
            cur+=math[i].size();
            id[i]=cont;
        }
    }
    id[cntm]=cont;
    MO(a,b,c,exam_av,id);
}

Compilation message

examination.cpp: In function 'void pupd(int, int)':
examination.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i=x;i<BIT.size();i=next(i))BIT[i]+=k;
      |                 ~^~~~~~~~~~~
examination.cpp: In function 'void MO(std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
examination.cpp:84:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |         if(min_av==av.size()){
      |            ~~~~~~^~~~~~~~~~~
examination.cpp: In function 'int main()':
examination.cpp:159:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  159 |     for(int i=0;i<math.size();i++){
      |                 ~^~~~~~~~~~~~
examination.cpp:160:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  160 |         if(math[i].size()>=sz){
      |            ~~~~~~~~~~~~~~^~~~
examination.cpp:165:36: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  165 |         }else if(math[i].size()+cur>sz){
      |                  ~~~~~~~~~~~~~~~~~~^~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3540 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3540 KB Output is correct
5 Correct 2 ms 3416 KB Output is correct
6 Correct 2 ms 3540 KB Output is correct
7 Correct 31 ms 4756 KB Output is correct
8 Correct 30 ms 4756 KB Output is correct
9 Correct 30 ms 4764 KB Output is correct
10 Correct 28 ms 4376 KB Output is correct
11 Correct 22 ms 4308 KB Output is correct
12 Correct 13 ms 3736 KB Output is correct
13 Correct 30 ms 4764 KB Output is correct
14 Correct 32 ms 4812 KB Output is correct
15 Correct 32 ms 4736 KB Output is correct
16 Correct 5 ms 4308 KB Output is correct
17 Correct 25 ms 4364 KB Output is correct
18 Correct 3 ms 3668 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2583 ms 31780 KB Output is correct
2 Correct 2665 ms 31848 KB Output is correct
3 Correct 2639 ms 31884 KB Output is correct
4 Correct 1376 ms 22888 KB Output is correct
5 Correct 255 ms 22600 KB Output is correct
6 Correct 91 ms 9284 KB Output is correct
7 Correct 1533 ms 31896 KB Output is correct
8 Correct 2021 ms 31860 KB Output is correct
9 Correct 1869 ms 31876 KB Output is correct
10 Correct 156 ms 22300 KB Output is correct
11 Correct 1218 ms 22604 KB Output is correct
12 Correct 46 ms 8640 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2583 ms 31780 KB Output is correct
2 Correct 2665 ms 31848 KB Output is correct
3 Correct 2639 ms 31884 KB Output is correct
4 Correct 1376 ms 22888 KB Output is correct
5 Correct 255 ms 22600 KB Output is correct
6 Correct 91 ms 9284 KB Output is correct
7 Correct 1533 ms 31896 KB Output is correct
8 Correct 2021 ms 31860 KB Output is correct
9 Correct 1869 ms 31876 KB Output is correct
10 Correct 156 ms 22300 KB Output is correct
11 Correct 1218 ms 22604 KB Output is correct
12 Correct 46 ms 8640 KB Output is correct
13 Correct 2710 ms 31880 KB Output is correct
14 Correct 2801 ms 31884 KB Output is correct
15 Correct 2690 ms 31868 KB Output is correct
16 Correct 1423 ms 22884 KB Output is correct
17 Correct 274 ms 22712 KB Output is correct
18 Correct 92 ms 9288 KB Output is correct
19 Correct 2743 ms 31860 KB Output is correct
20 Correct 2654 ms 31888 KB Output is correct
21 Correct 2110 ms 31944 KB Output is correct
22 Correct 161 ms 22380 KB Output is correct
23 Correct 1318 ms 22544 KB Output is correct
24 Correct 48 ms 8572 KB Output is correct

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3540 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3540 KB Output is correct
5 Correct 2 ms 3416 KB Output is correct
6 Correct 2 ms 3540 KB Output is correct
7 Correct 31 ms 4756 KB Output is correct
8 Correct 30 ms 4756 KB Output is correct
9 Correct 30 ms 4764 KB Output is correct
10 Correct 28 ms 4376 KB Output is correct
11 Correct 22 ms 4308 KB Output is correct
12 Correct 13 ms 3736 KB Output is correct
13 Correct 30 ms 4764 KB Output is correct
14 Correct 32 ms 4812 KB Output is correct
15 Correct 32 ms 4736 KB Output is correct
16 Correct 5 ms 4308 KB Output is correct
17 Correct 25 ms 4364 KB Output is correct
18 Correct 3 ms 3668 KB Output is correct
19 Correct 2583 ms 31780 KB Output is correct
20 Correct 2665 ms 31848 KB Output is correct
21 Correct 2639 ms 31884 KB Output is correct
22 Correct 1376 ms 22888 KB Output is correct
23 Correct 255 ms 22600 KB Output is correct
24 Correct 91 ms 9284 KB Output is correct
25 Correct 1533 ms 31896 KB Output is correct
26 Correct 2021 ms 31860 KB Output is correct
27 Correct 1869 ms 31876 KB Output is correct
28 Correct 156 ms 22300 KB Output is correct
29 Correct 1218 ms 22604 KB Output is correct
30 Correct 46 ms 8640 KB Output is correct
31 Correct 2710 ms 31880 KB Output is correct
32 Correct 2801 ms 31884 KB Output is correct
33 Correct 2690 ms 31868 KB Output is correct
34 Correct 1423 ms 22884 KB Output is correct
35 Correct 274 ms 22712 KB Output is correct
36 Correct 92 ms 9288 KB Output is correct
37 Correct 2743 ms 31860 KB Output is correct
38 Correct 2654 ms 31888 KB Output is correct
39 Correct 2110 ms 31944 KB Output is correct
40 Correct 161 ms 22380 KB Output is correct
41 Correct 1318 ms 22544 KB Output is correct
42 Correct 48 ms 8572 KB Output is correct
43 Execution timed out 3087 ms 43852 KB Time limit exceeded
44 Halted 0 ms 0 KB -