oj.uz

답안 #623388

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
623388 2022-08-05T14:11:20 Z Iwanttobreakfree Examination (JOI19_examination) C++17
2 / 100
 3000 ms 31272 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=900,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;
    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:32:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     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:83:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |         if(min_av==av.size()){
      |            ~~~~~~^~~~~~~~~~~
examination.cpp: In function 'int main()':
examination.cpp:158:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  158 |     for(int i=0;i<math.size();i++){
      |                 ~^~~~~~~~~~~~
examination.cpp:159:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  159 |         if(math[i].size()>=sz){
      |            ~~~~~~~~~~~~~~^~~~
examination.cpp:164:36: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  164 |         }else if(math[i].size()+cur>sz){
      |                  ~~~~~~~~~~~~~~~~~~^~~

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3540 KB Output is correct
3 Correct 2 ms 3464 KB Output is correct
4 Correct 3 ms 3540 KB Output is correct
5 Correct 2 ms 3540 KB Output is correct
6 Correct 3 ms 3412 KB Output is correct
7 Correct 46 ms 4744 KB Output is correct
8 Correct 47 ms 4748 KB Output is correct
9 Correct 40 ms 4768 KB Output is correct
10 Correct 44 ms 4368 KB Output is correct
11 Correct 31 ms 4352 KB Output is correct
12 Correct 21 ms 3732 KB Output is correct
13 Correct 49 ms 4744 KB Output is correct
14 Correct 48 ms 4692 KB Output is correct
15 Correct 44 ms 4764 KB Output is correct
16 Correct 8 ms 4352 KB Output is correct
17 Correct 34 ms 4484 KB Output is correct
18 Correct 4 ms 3668 KB Output is correct

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 3037 ms 31272 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 3037 ms 31272 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3540 KB Output is correct
3 Correct 2 ms 3464 KB Output is correct
4 Correct 3 ms 3540 KB Output is correct
5 Correct 2 ms 3540 KB Output is correct
6 Correct 3 ms 3412 KB Output is correct
7 Correct 46 ms 4744 KB Output is correct
8 Correct 47 ms 4748 KB Output is correct
9 Correct 40 ms 4768 KB Output is correct
10 Correct 44 ms 4368 KB Output is correct
11 Correct 31 ms 4352 KB Output is correct
12 Correct 21 ms 3732 KB Output is correct
13 Correct 49 ms 4744 KB Output is correct
14 Correct 48 ms 4692 KB Output is correct
15 Correct 44 ms 4764 KB Output is correct
16 Correct 8 ms 4352 KB Output is correct
17 Correct 34 ms 4484 KB Output is correct
18 Correct 4 ms 3668 KB Output is correct
19 Execution timed out 3037 ms 31272 KB Time limit exceeded
20 Halted 0 ms 0 KB -