oj.uz

답안 #484937

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
484937 2021-11-05T18:41:24 Z Bench0310 Hotel (CEOI11_hot) C++17
100 / 100
 1841 ms 96772 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

const int N=500005;
vector<int> tree(4*N,0);
vector<int> lazy(4*N,0);

void pull(int idx)
{
    tree[idx]=max(tree[2*idx],tree[2*idx+1]);
}

void apply(int idx,int x)
{
    tree[idx]+=x;
    lazy[idx]+=x;
}

void push(int idx)
{
    for(int i=0;i<2;i++) apply(2*idx+i,lazy[idx]);
    lazy[idx]=0;
}

void update(int idx,int l,int r,int ql,int qr,int x)
{
    if(ql>qr) return;
    if(l==ql&&r==qr) apply(idx,x);
    else
    {
        int m=(l+r)/2;
        push(idx);
        update(2*idx,l,m,ql,min(qr,m),x);
        update(2*idx+1,m+1,r,max(ql,m+1),qr,x);
        pull(idx);
    }
}

int descend(int idx,int l,int r)
{
    if(l==r) return l;
    int m=(l+r)/2;
    push(idx);
    if(tree[2*idx]>=tree[2*idx+1]) return descend(2*idx,l,m);
    else return descend(2*idx+1,m+1,r);
}

//void print(int idx,int l,int r)
//{
//    if(l==r) cout << "[" << l << ": " << tree[idx] << "] ";
//    else
//    {
//        int m=(l+r)/2;
//        push(idx);
//        print(2*idx,l,m);
//        print(2*idx+1,m+1,r);
//    }
//}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n,m,o;
    cin >> n >> m >> o;
    vector<array<int,2>> ini(n+1,{0,0});
    for(int i=1;i<=n;i++) cin >> ini[i][1] >> ini[i][0];
    sort(ini.begin(),ini.end());
    vector<int> p(n+1,0);
    vector<int> c(n+2,0);
    c[n+1]=(1<<30);
    for(int i=1;i<=n;i++)
    {
        p[i]=ini[i][0];
        c[i]=ini[i][1];
    }
    vector<bool> vis(n+1,0);
    vector<int> v[n+1];
    for(int i=1;i<=n;i++) v[i].push_back(0);
    for(int i=0;i<m;i++)
    {
        int x,d;
        cin >> x >> d;
        int t=(lower_bound(p.begin(),p.end(),d)-p.begin());
        if(t<=n) v[t].push_back(x);
    }
    for(int i=1;i<=n;i++) sort(v[i].begin(),v[i].end());
//    cout << "c: ";
//    for(int i=1;i<=n;i++) cout << c[i] << " ";
//    cout << endl;
//    cout << "opt:" << endl;
//    for(int i=1;i<=n;i++)
//    {
//        cout << i << ": ";
//        for(int x:v[i]) cout << x << " ";
//        cout << endl;
//    }
    for(int i=1;i<=n;i++) update(1,1,n,i,i,v[i].back()-c[i]);
    set<int> s;
    for(int i=0;i<=n+1;i++) s.insert(i);
    auto prv=[&](int x)->int
    {
        auto it=s.lower_bound(x);
        return (*prev(it));
    };
    auto nxt=[&](int x)->int
    {
        auto it=s.lower_bound(x);
        return (*it);
    };
//    auto state=[&]()
//    {
//        cout << "active: ";
//        for(int x:s) cout << x << " ";
//        cout << endl;
//        cout << "tree: ";
//        print(1,1,n);
//        cout << endl;
//    };
    ll res=0;
    while(o--)
    {
        int mx=tree[1];
        if(mx<0) break;
        res+=mx;
        int t=descend(1,1,n);
//        state();
//        cout << "t=" << t << endl;
        int d=(-v[t].back()+v[t][(int)v[t].size()-2]);
        update(1,1,n,t,t,d);
        v[t].pop_back();
        int i=nxt(t);
//        cout << "i=" << i << endl;
        s.erase(i);
        int r=nxt(i);
        int l=prv(i);
        update(1,1,n,l+1,i,c[i]-c[r]);
    }
    cout << res << "\n";
    return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 15948 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15908 KB Output is correct
2 Correct 7 ms 15948 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15948 KB Output is correct
2 Correct 8 ms 15984 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15948 KB Output is correct
2 Correct 11 ms 15948 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 17200 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 61 ms 20804 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 149 ms 24668 KB Output is correct
2 Correct 101 ms 26056 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 477 ms 40636 KB Output is correct
2 Correct 141 ms 31904 KB Output is correct

Subtask #9
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 631 ms 65204 KB Output is correct
2 Correct 591 ms 79624 KB Output is correct

Subtask #10
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 602 ms 77156 KB Output is correct
2 Correct 1324 ms 96772 KB Output is correct
3 Correct 1841 ms 95252 KB Output is correct