oj.uz

Submission #616114

# Submission time Handle Problem Language Result Execution time Memory
616114 2022-07-31T22:13:36 Z Iwanttobreakfree Examination (JOI19_examination) C++17
2 / 100
 3000 ms 31032 KB 
#include <iostream>
#include <vector>
#include <unordered_map>
#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=500,ans=0;
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);
            ans++;
        }
    }
    //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);
            ans--;
        }
        cnt[x]--;
    }
    //cout<<ans<<'\n';
}
vector<vector<int>> math,info;
void MO(int q,vector<int>& m,vector<int>& in,vector<int>& av,vector<int>& exam){
    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;
        //cout<<x<<' '<<y<<' '<<z<<'\n';
        qu[i]={x/sz,{{x,y},{z,i}}};
    }
    sort(qu.begin(),qu.end(),cmp);
    int l_math=m.size(),l_info=in.size();
    m.push_back(1e9+7);
    in.push_back(1e9+7);
    for(int i=0;i<q;i++){
        int min_math=qu[i].second.first.first,min_info=qu[i].second.first.second,min_av;
        if(q<3001)min_av=bin_find(qu[i].second.second.first,av);
        else min_av=0;
        //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>0&&m[l_math]>min_math){
            l_math--;
            add(l_math,math,exam);
        }
        while(l_math+1<m.size()&&m[l_math]<min_math){
            del(l_math,math,exam);
            l_math++;
        }
        //cout<<l_math<<' '<<l_info<<'\n';
        while(l_info>0&&in[l_info]>min_info){
            l_info--;
            //cout<<l_info<<' ';
            add(l_info,info,exam);
        }
        //cout<<l_info<<' ';
        while(l_info+1<in.size()&&in[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]=ans-sum(min_av);
    }
    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 n,q,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.push_back(x);
    }
    for(int x:in){
        mp_i[x]=cnti;
        cnti++;
        b.push_back(x);
    }
    for(int x:av){
        mp_a[x]=cnta;
        cnta++;
        c.push_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]]].push_back(i);
        info[mp_i[exam_info[i]]].push_back(i);
    }
    MO(q,a,b,c,exam_av);
}

Compilation message

examination.cpp: In function 'void pupd(int, int)':
examination.cpp:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i=x;i<BIT.size();i=next(i))BIT[i]+=k;
      |                 ~^~~~~~~~~~~
examination.cpp: In function 'void MO(int, std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
examination.cpp:85:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |         if(min_av==av.size()){
      |            ~~~~~~^~~~~~~~~~~
examination.cpp:94:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |         while(l_math+1<m.size()&&m[l_math]<min_math){
      |               ~~~~~~~~^~~~~~~~~
examination.cpp:105:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |         while(l_info+1<in.size()&&in[l_info]<min_info){
      |               ~~~~~~~~^~~~~~~~~~

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 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3436 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 124 ms 4720 KB Output is correct
8 Correct 119 ms 4724 KB Output is correct
9 Correct 122 ms 4820 KB Output is correct
10 Correct 76 ms 4328 KB Output is correct
11 Correct 78 ms 4320 KB Output is correct
12 Correct 48 ms 3700 KB Output is correct
13 Correct 123 ms 4716 KB Output is correct
14 Correct 120 ms 4736 KB Output is correct
15 Correct 122 ms 4720 KB Output is correct
16 Correct 219 ms 4312 KB Output is correct
17 Correct 221 ms 4320 KB Output is correct
18 Correct 49 ms 3668 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3055 ms 31032 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3055 ms 31032 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3436 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 124 ms 4720 KB Output is correct
8 Correct 119 ms 4724 KB Output is correct
9 Correct 122 ms 4820 KB Output is correct
10 Correct 76 ms 4328 KB Output is correct
11 Correct 78 ms 4320 KB Output is correct
12 Correct 48 ms 3700 KB Output is correct
13 Correct 123 ms 4716 KB Output is correct
14 Correct 120 ms 4736 KB Output is correct
15 Correct 122 ms 4720 KB Output is correct
16 Correct 219 ms 4312 KB Output is correct
17 Correct 221 ms 4320 KB Output is correct
18 Correct 49 ms 3668 KB Output is correct
19 Execution timed out 3055 ms 31032 KB Time limit exceeded
20 Halted 0 ms 0 KB -