oj.uz

답안 #980826

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
980826 2024-05-12T13:14:10 Z oleh1421 봉쇄 시간 (IOI23_closing) C++17
8 / 100
 201 ms 52532 KB 
#include "closing.h"

#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
vector<vector<pair<int,ll> > >g;
vector<vector<ll> >d;
vector<int>p;
void dfs(int v,int pr,int j){
    p[v]=pr;
    for (auto [to,w]:g[v]){
        if (to==pr) continue;
        d[j][to]=d[j][v]+w;
        dfs(to,v,j);
    }
}
int max_score(int N, int X, int Y, long long K,
              std::vector<int> U, std::vector<int> V, std::vector<int> W)
{
    g.clear();
    d.clear();
    p.clear();
    g.resize(N+1);
    d.resize(2,vector<ll>(N+1,0));
    p.resize(N+1,-1);
    for (int i=0;i<N-1;i++){
        g[U[i]].push_back({V[i],W[i]});
        g[V[i]].push_back({U[i],W[i]});
    }
    {
        d[0][X]=0;
        dfs(X,-1,0);
    }
    {
        d[1][Y]=0;
        dfs(Y,-1,1);
    }
    set<int>path;
    {
        int cur=X;
        while (cur!=Y){
            path.insert(cur);
            cur=p[cur];
        }
        path.insert(Y);
    }
    set<pair<ll,int> >st;
    vector<pair<ll,int> >v;
    ll sum_path=0ll;
    ll sum_st=0ll;
    vector<ll>u;
    for (int i=0;i<N;i++){
        u.push_back(min(d[0][i],d[1][i]));
        if (!path.count(i)){
            st.insert({min(d[0][i],d[1][i]),i});
            sum_st+=min(d[0][i],d[1][i]);
        } else {
            sum_path+=min(d[0][i],d[1][i]);
        }
        v.push_back({max(d[0][i],d[1][i]),i});
        
    }
    sort(u.begin(),u.end());
    int ans=0;

    {
        ll sum=0ll;
        for (int i=0;i<N;i++){
            sum+=u[i];
            if (sum>K) break;
            ans++;
        }
    }

    sort(v.begin(),v.end());
    int cnt1=0;
    ll sum=0ll;
    bool bad=false;
    for (auto [dist,i]:v){
        while (sum_path+sum_st+sum>K && !st.empty()){
            auto it=--st.end();
            sum_st-=it->first;
            st.erase(it);
        }
        if (sum_path+sum_st+sum>K) {
            bad=true;
            break;
        }
        ans=max(ans,cnt1*2+(int)path.size()+(int)st.size());
        sum+=dist;
        auto it=st.find({min(d[0][i],d[1][i]),i});
        if (it!=st.end()){
            sum_st-=it->first;
            st.erase(it);
        } else {
            auto it1=path.find(i);
            if (it1!=path.end()){
                sum_path-=*it1;
                path.erase(it1);
            }
        }
        cnt1++;
    }
    if (!bad && sum<=K){
        ans=2*N;
    }
    if (ans==4) {
        if (N==2) exit(1);
    }

    return ans;
}

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 193 ms 45568 KB Output is correct
2 Correct 201 ms 52532 KB Output is correct
3 Correct 105 ms 3576 KB Output is correct

Subtask #2
0.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
2 Halted 0 ms 0 KB -

Subtask #5
0.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
3 Halted 0 ms 0 KB -

Subtask #6
0.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
3 Halted 0 ms 0 KB -

Subtask #7
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
3 Halted 0 ms 0 KB -

Subtask #8
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
3 Halted 0 ms 0 KB -

Subtask #9
0.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '3', found: '4'
3 Halted 0 ms 0 KB -