oj.uz

Submission #223614

# Submission time Handle Problem Language Result Execution time Memory
223614 2020-04-15T18:20:55 Z Andrei_Cotor Election (BOI18_election) C++11
100 / 100
 657 ms 44408 KB 
#include<fstream>
#include<vector>
#include<deque>
#include<algorithm>
#include<iostream>

using namespace std;

//ifstream fi("election.in");
//ofstream fo("election.out");

char S[500005];
vector<pair<int,int> > Q[500005];
deque<int> Canceled;
int Rez[500005];
int MinSuf[2000005],Sum[2000005];

void update(int nod, int st, int dr, int poz, int val)
{
    if(st==dr)
    {
        MinSuf[nod]=min(0,val);
        Sum[nod]=val;
        return;
    }

    int mij=(st+dr)/2;

    if(poz<=mij)
        update(2*nod,st,mij,poz,val);
    else
        update(2*nod+1,mij+1,dr,poz,val);

    Sum[nod]=Sum[2*nod]+Sum[2*nod+1];
    MinSuf[nod]=min(MinSuf[2*nod+1],Sum[2*nod+1]+MinSuf[2*nod]);
}

int sumsuf;

int getDecalaj(int nod, int st, int dr, int l, int r)
{
    if(l<=st && dr<=r)
    {
        int _sumsuf=sumsuf;
        sumsuf+=Sum[nod];
        return _sumsuf+MinSuf[nod];
    }

    int mij=(st+dr)/2;
    int rez=0;

    if(r>mij)
        rez=min(rez,getDecalaj(2*nod+1,mij+1,dr,l,r));
    if(l<=mij)
        rez=min(rez,getDecalaj(2*nod,st,mij,l,r));

    return rez;
}

int src(int poz)
{
    int rez=-1;
    for(int i=18; i>=0; i--)
    {
        if(rez+(1<<i)<Canceled.size() && Canceled[rez+(1<<i)]>poz)
            rez+=(1<<i);
    }

    return Canceled.size()-rez-1;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin>>n;
    cin>>(S+1);

    int q;
    cin>>q;
    for(int i=1; i<=q; i++)
    {
        int x,y;
        cin>>x>>y;

        Q[x].push_back({y,i});
    }

    for(int i=n; i>=1; i--)
    {
        if(S[i]=='C')
        {
            update(1,1,n,i,1);
            if(!Canceled.empty())
            {
                int last=Canceled.back();
                Canceled.pop_back();

                update(1,1,n,last,-1);
            }
        }
        else
        {
            Canceled.push_back(i);
        }

        for(auto qry:Q[i])
        {
            int dr=qry.first;
            int ind=qry.second;

            sumsuf=0;
            int stdr=src(dr);
            int drst=-getDecalaj(1,1,n,i,dr);
            Rez[ind]=stdr+drst;
        }
    }

    for(int i=1; i<=q; i++)
        cout<<Rez[i]<<"\n";
    //fi.close();
    //fo.close();
    return 0;
}

Compilation message

election.cpp: In function 'int src(int)':
election.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(rez+(1<<i)<Canceled.size() && Canceled[rez+(1<<i)]>poz)
            ~~~~~~~~~~^~~~~~~~~~~~~~~~

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12288 KB Output is correct
2 Correct 12 ms 12288 KB Output is correct
3 Correct 12 ms 12288 KB Output is correct
4 Correct 12 ms 12288 KB Output is correct
5 Correct 12 ms 12160 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12288 KB Output is correct
2 Correct 12 ms 12288 KB Output is correct
3 Correct 12 ms 12288 KB Output is correct
4 Correct 12 ms 12288 KB Output is correct
5 Correct 12 ms 12160 KB Output is correct
6 Correct 74 ms 17272 KB Output is correct
7 Correct 65 ms 16632 KB Output is correct
8 Correct 67 ms 16760 KB Output is correct
9 Correct 75 ms 17276 KB Output is correct
10 Correct 71 ms 17016 KB Output is correct
11 Correct 74 ms 17272 KB Output is correct
12 Correct 75 ms 17272 KB Output is correct
13 Correct 74 ms 17016 KB Output is correct
14 Correct 85 ms 17276 KB Output is correct
15 Correct 73 ms 17272 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12288 KB Output is correct
2 Correct 12 ms 12288 KB Output is correct
3 Correct 12 ms 12288 KB Output is correct
4 Correct 12 ms 12288 KB Output is correct
5 Correct 12 ms 12160 KB Output is correct
6 Correct 74 ms 17272 KB Output is correct
7 Correct 65 ms 16632 KB Output is correct
8 Correct 67 ms 16760 KB Output is correct
9 Correct 75 ms 17276 KB Output is correct
10 Correct 71 ms 17016 KB Output is correct
11 Correct 74 ms 17272 KB Output is correct
12 Correct 75 ms 17272 KB Output is correct
13 Correct 74 ms 17016 KB Output is correct
14 Correct 85 ms 17276 KB Output is correct
15 Correct 73 ms 17272 KB Output is correct
16 Correct 620 ms 43188 KB Output is correct
17 Correct 476 ms 38904 KB Output is correct
18 Correct 545 ms 40348 KB Output is correct
19 Correct 527 ms 41772 KB Output is correct
20 Correct 611 ms 42232 KB Output is correct
21 Correct 657 ms 44408 KB Output is correct
22 Correct 629 ms 43984 KB Output is correct
23 Correct 643 ms 43256 KB Output is correct
24 Correct 625 ms 43384 KB Output is correct
25 Correct 613 ms 43336 KB Output is correct