Submission #948048

#	Time	Username	Problem	Language	Result	Execution time	Memory
948048		GrindMachine	Hotel (CEOI11_hot)	C++17	100 / 100	536 ms	56124 KiB

hot

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

template<typename T>
struct segtree {
    // https://codeforces.com/blog/entry/18051

    /*=======================================================*/

    struct data {
        ll mn,ind;
    };

    data neutral = {inf2,-1};

    data merge(data &left, data &right) {
        data curr;

        if(left.mn <= right.mn) curr = left;
        else curr = right;
        
        return curr;
    }

    void create(int i, T v) {
        tr[i] = {v,i-n};
    }

    void modify(int i, T v) {
        tr[i] = {v,i-n};
    }

    /*=======================================================*/

    int n;
    vector<data> tr;

    segtree() {

    }

    segtree(int siz) {
        init(siz);
    }

    void init(int siz) {
        n = siz;
        tr.assign(2 * n, neutral);
    }

    void build(vector<T> &a, int siz) {
        rep(i, siz) create(i + n, a[i]);
        rev(i, n - 1, 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
    }

    void pupd(int i, T v) {
        modify(i + n, v);
        for (i = (i + n) >> 1; i; i >>= 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
    }

    data query(int l, int r) {
        data resl = neutral, resr = neutral;

        for (l += n, r += n; l <= r; l >>= 1, r >>= 1) {
            if (l & 1) resl = merge(resl, tr[l++]);
            if (!(r & 1)) resr = merge(tr[r--], resr);
        }

        return merge(resl, resr);
    }
};

void solve(int test_case)
{
    ll n,m,k; cin >> n >> m >> k;
    vector<pll> a(n+5), b(m+5);
    rep1(i,n){
        cin >> a[i].ss >> a[i].ff;
    }
    rep1(i,m){
        cin >> b[i].ff >> b[i].ss;
    }

    sort(a.begin()+1,a.begin()+n+1);
    sort(b.begin()+1,b.begin()+m+1);
    segtree<ll> st(n+5);
    rep1(i,n) st.pupd(i,a[i].ss);

    vector<ll> profits;

    rev(i,m,1){
        auto [cost,cap] = b[i];
        ll pos = lower_bound(a.begin()+1,a.begin()+n+1,make_pair(cap,-1ll))-a.begin();
        auto [mn,ind] = st.query(pos,n);
        if(ind != -1){
            profits.pb(cost-mn);
            st.pupd(ind,inf2);
        }
    }

    sort(rall(profits));
    ll ans = 0;

    rep(i,sz(profits)){
        if(i >= k) break;
        if(profits[i] < 0) break;
        ans += profits[i];
    }

    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10