Submission #1157949

#	Time	Username	Problem	Language	Result	Execution time	Memory
1157949		alexdd	늑대인간 (IOI18_werewolf)	C++20	34 / 100	478 ms	59992 KiB

werewolf

#include "werewolf.h"
#include<bits/stdc++.h>
using namespace std;
vector<int> con[200005];
int poz[200005];
pair<int,int> forL[400005],forR[400005];
vector<int> withL[400005],withR[400005];
std::vector<int> check_validity(int N, std::vector<int> X, std::vector<int> Y,
                                std::vector<int> S, std::vector<int> E,
                                std::vector<int> L, std::vector<int> R) {

    for(int i=0;i<L.size();i++)
    {
        withL[L[i]].push_back(i);
        withR[R[i]].push_back(i);
    }
    for(int i=0;i<X.size();i++)
    {
        con[X[i]].push_back(Y[i]);
        con[Y[i]].push_back(X[i]);
    }
    int cap=-1;
    for(int i=0;i<N;i++)
        if((int)con[i].size()<=1)
            cap = i;
    vector<int> lant;
    lant.push_back(cap);
    for(int i=1;i<N;i++)
    {
        if(i-2>=0 && con[lant[i-1]][0] == lant[i-2])
            lant.push_back(con[lant[i-1]][1]);
        else
            lant.push_back(con[lant[i-1]][0]);
    }
    assert((int)lant.size()==N);
    for(int i=0;i<N;i++)
        poz[lant[i]]=i;

    set<int> rele;
    for(int i=0;i<N;i++)
        rele.insert(poz[i]);
    rele.insert(-1);
    rele.insert(N);
    for(int i=N-1;i>=0;i--)
    {
        rele.erase(poz[i]);
        for(int id:withL[i])
        {
            forL[id].second = *rele.lower_bound(poz[S[id]]);
            forL[id].first = *prev(rele.lower_bound(poz[S[id]]));
            forL[id].second--;
            forL[id].first++;
        }
    }
    rele.clear();
    for(int i=0;i<N;i++)
        rele.insert(poz[i]);
    rele.insert(-1);
    rele.insert(N);
    for(int i=0;i<N;i++)
    {
        rele.erase(poz[i]);
        for(int id:withR[i])
        {
            forR[id].second = *rele.lower_bound(poz[E[id]]);
            forR[id].first = *prev(rele.lower_bound(poz[E[id]]));
            forR[id].second--;
            forR[id].first++;
        }
    }

    vector<int> sol;
    for(int i=0;i<S.size();i++)
    {
        if(poz[S[i]] < poz[E[i]])
        {
            if(forL[i].second >= forR[i].first)
                sol.push_back(1);
            else
                sol.push_back(0);
        }
        else
        {
            if(forR[i].second >= forL[i].first)
                sol.push_back(1);
            else
                sol.push_back(0);
        }
    }
    return sol;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 8
• Subtask 3: 34 / 34
• Subtask 4: 0 / 51