Submission #986596

#	Time	Username	Problem	Language	Result	Execution time	Memory
986596		activedeltorre	Interval Collection (CCO20_day2problem2)	C++14	18 / 25	7055 ms	337428 KiB

Main

#include <iostream>
#include <vector>
#include <set>
#include <map>
#pragma GCC optimize("Ofast,unroll-loops")
using namespace std;
struct ura
{
    int a,b;
};
vector<ura>vec;
const int nmax=1000005;
int aint[nmax*4];
int aint2[nmax*4];
int inf=1e9+5;
int inter(int i,int j)
{
    return max(0,min(vec[i].b,vec[j].b)-max(vec[i].a,vec[j].a));
}
int reun(int i,int j)
{
    return max(vec[i].b,vec[j].b)-min(vec[i].a,vec[j].a);
}
int distsol,cost;
multiset<int>lfend;
multiset<int>rgend;
/// qr1 pe partea dreapta
struct undos
{
    int unde,pozupdate,delacat;
};
vector<undos>oper;
int qr1(int node,int st,int dr,int qst,int qdr)
{
    if(st>qdr || st>dr || qst>dr || qst>qdr)
        return inf;
    if(qst<=st && dr<=qdr)
        return aint[node];
    int mij=(st+dr)>>1;
    return min(qr1(node*2,st,mij,qst,qdr),qr1(node*2+1,mij+1,dr,qst,qdr));
}
int qr2(int node,int st,int dr,int qst,int qdr)
{
    if(st>qdr || st>dr || qst>dr || qst>qdr)
        return -inf;
    if(qst<=st && dr<=qdr)
        return aint2[node];
    int mij=(st+dr)>>1;
    return max(qr2(node*2,st,mij,qst,qdr),qr2(node*2+1,mij+1,dr,qst,qdr));
}
void update1(int node,int st,int dr,int poz,int val,int smech)
{
    if(st>poz || poz>dr)
        return ;
    if(poz<=st && dr<=poz)
    {
        if(smech==1)
            aint[node]=val;
        else
        {
            oper.push_back({1,poz,aint[node]});
            aint[node]=min(aint[node],val);
        }
        return;
    }
    int mij=(st+dr)>>1;
    update1(node*2,st,mij,poz,val,smech);
    update1(node*2+1,mij+1,dr,poz,val,smech);
    aint[node]=min(aint[node*2],aint[node*2+1]);
}
void update2(int node,int st,int dr,int poz,int val,int smech)
{
    if(st>poz || poz>dr)
        return ;
    if(poz<=st && dr<=poz)
    {
        if(smech==1)
            aint2[node]=val;
        else
        {
            oper.push_back({2,poz,aint2[node]});
            aint2[node]=max(aint2[node],val);
        }
        return;
    }
    int mij=(st+dr)>>1;
    update2(node*2,st,mij,poz,val,smech);
    update2(node*2+1,mij+1,dr,poz,val,smech);
    aint2[node]=max(aint2[node*2],aint2[node*2+1]);
}
void clr(int node,int st,int dr)
{
    aint2[node]=-inf;
    aint[node]=inf;
    if(st!=dr)
    {
        int mij=(st+dr)/2;
        clr(node*2,st,mij);
        clr(node*2+1,mij+1,dr);
    }
}
multiset<pair<int,int> >solutii;
void undo()
{
    undos a;
    a=oper.back();
    if(a.unde==1)
        update1(1,1,nmax,a.pozupdate,a.delacat,1);
    else if(a.unde==2)
        update2(1,1,nmax,a.pozupdate,a.delacat,1);
    else if(a.unde==3)
        solutii.erase(solutii.find({a.pozupdate,a.delacat}));
    else if(a.unde==4)
        rgend.erase(rgend.find(a.pozupdate));
    else
        lfend.erase(lfend.find(a.pozupdate));
    oper.pop_back();
}
void add(ura x)
{
    int sol=inf,cost=inf,supra=inf,nosupra=inf,supra1=inf,nosupra1=inf;
    if(lfend.size() && x.b>*prev(lfend.end()))
    {
        supra=x.b-*prev(lfend.end());
        nosupra=qr1(1,1,nmax,*prev(lfend.end()),nmax)-x.a;
    }
    else if(lfend.size())
    {
        supra=0;
        nosupra=qr1(1,1,nmax,x.b,nmax)-x.a;
    }
    lfend.insert(x.a);
    update1(1,1,nmax,x.a,x.b,0);
    if(rgend.size() && x.a<=*rgend.begin())
    {
        supra1=*rgend.begin()-x.a;
        nosupra1=x.b-qr2(1,1,nmax,1,*rgend.begin());
    }
    else if(rgend.size())
    {
        supra1=0;
        nosupra1=x.b-qr2(1,1,nmax,1,x.a);
    }
    rgend.insert(x.b);
    update2(1,1,nmax,x.b,x.a,0);
    if(supra1<supra)
    {
        swap(supra1,supra);
        swap(nosupra1,nosupra);
    }
    else if(supra1==supra)
    {
        nosupra=min(nosupra1,nosupra);
    }
    if(supra>=x.b-x.a)
    {
        supra=x.b-x.a;
        nosupra=x.b-x.a;
    }
    solutii.insert({supra,nosupra});
    oper.push_back({3,supra,nosupra});
    oper.push_back({4,x.b,0});
    oper.push_back({5,x.a,0});
}
vector<ura>vectorus[nmax*4];
map<pair<int,int>,int>fre;
map<pair<int,int>,int>lst;
void dncadd(int node,int st,int dr,int qst,int qdr,int lf,int rg)
{
    if(st>qdr || st>dr || qst>dr || qst>qdr)
    {
        return ;
    }
    if(qst<=st && dr<=qdr)
    {
        vectorus[node].push_back({lf,rg});
        return;
    }
    int mij=(st+dr)/2;
    dncadd(node*2,st,mij,qst,qdr,lf,rg);
    dncadd(node*2+1,mij+1,dr,qst,qdr,lf,rg);
}
void dfsdnc(int curr,int st,int dr)
{
    int number=oper.size();
    for(int j=0;j<vectorus[curr].size();j++)
    {
        add(vectorus[curr][j]);
    }
    if(st==dr)
    {
        cout<<solutii.begin()->second<<'\n';
    }
    else
    {
        int mij=(st+dr)/2;
        dfsdnc(curr*2,st,mij);
        dfsdnc(curr*2+1,mij+1,dr);
    }
    while(oper.size()>number)
    {
        undo();
    }
}
int main()
{
    int n,i,j,k,l,r,z;
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin>>n;
    char tip;
    for(i=1; i<=n; i++)
    {
        cin>>tip;
        if(tip=='A')
        {
            cin>>l>>r;
            l++;
            r++;
            fre[{l,r}]++;
            if(fre[{l,r}]==1)
               lst[{l,r}]=i;
        }
        else if(tip=='R')
        {
            cin>>l>>r;
            l++;
            r++;
            fre[{l,r}]--;
            if(fre[{l,r}]==0)
            {
                dncadd(1,1,n,lst[{l,r}],i-1,l,r);
            }
        }
    }
    for(auto j :fre)
    {
        if(j.second>0)
        {
            dncadd(1,1,n,lst[j.first],n,j.first.first,j.first.second);
        }
    }
    clr(1,1,nmax);
    dfsdnc(1,1,n);
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void add(ura)':
Main.cpp:121:9: warning: unused variable 'sol' [-Wunused-variable]
  121 |     int sol=inf,cost=inf,supra=inf,nosupra=inf,supra1=inf,nosupra1=inf;
      |         ^~~
Main.cpp:121:17: warning: unused variable 'cost' [-Wunused-variable]
  121 |     int sol=inf,cost=inf,supra=inf,nosupra=inf,supra1=inf,nosupra1=inf;
      |                 ^~~~
Main.cpp: In function 'void dfsdnc(int, int, int)':
Main.cpp:186:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ura>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  186 |     for(int j=0;j<vectorus[curr].size();j++)
      |                 ~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:200:22: warning: comparison of integer expressions of different signedness: 'std::vector<undos>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  200 |     while(oper.size()>number)
      |           ~~~~~~~~~~~^~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:207:13: warning: unused variable 'j' [-Wunused-variable]
  207 |     int n,i,j,k,l,r,z;
      |             ^
Main.cpp:207:15: warning: unused variable 'k' [-Wunused-variable]
  207 |     int n,i,j,k,l,r,z;
      |               ^
Main.cpp:207:21: warning: unused variable 'z' [-Wunused-variable]
  207 |     int n,i,j,k,l,r,z;
      |                     ^

• Subtask 1: 3 / 3
• Subtask 2: 8 / 8
• Subtask 3: 7 / 7
• Subtask 4: 0 / 4
• Subtask 5: 0 / 3