Submission #583558

#	Time	Username	Problem	Language	Result	Execution time	Memory
583558		Johann	Two Dishes (JOI19_dishes)	C++14	5 / 100	902 ms	40740 KiB

dishes

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<ll,ll>
#define tiii tuple<int,int,int>
#define vi vector<ll>
#define vpii vector<pii>
#define vtiii vector<tiii>
#define vvi vector<vi>
#define sz(x) (int) (x).size()
#define all(x) (x).begin(), (x).end()

const ll inf = 1LL << 60;
const int MAXN = 1e6 + 7;
ll N[2];
ll A[2][MAXN],T[2][MAXN],P[2][MAXN];

typedef ll data;
struct operation {
    ll addopt=0;
    ll maxopt=-inf;
};
struct segtree {
    vector<data> arr;
    vector<operation> opt;
    int size;
    segtree(int N) {
        size = 1;
        while (size < N) size *= 2;
        arr.resize(2*size);
        opt.resize(2*size);
    }
    void apply(int x, operation & o) {
        arr[x] += o.addopt;
        arr[x] = max(arr[x], o.maxopt);
    }
    void push(int x) {
        apply(x, opt[x]);
        if (x < size) {
            opt[2 * x].maxopt = max(opt[2 * x].maxopt, opt[x].maxopt);
            opt[2*x+1].maxopt = max(opt[2*x+1].maxopt, opt[x].maxopt);
            opt[2 * x].addopt += opt[x].addopt;
            opt[2*x+1].addopt += opt[x].addopt;
        }
        opt[x].addopt = 0;
        opt[x].maxopt = -inf;
    }
    data combine(data ld, data rd) {
        return max(ld, rd);
    }
    void apply(int l, int r, operation o, int x, int lx, int rx) { // add or max
        push(x);
        if (l <= lx && rx <= r) { opt[x] = o; return; }
        if (rx <= l || r <= lx) { return; }
        int m = ( lx + rx ) / 2;
        apply(l, r, o, 2 * x, lx, m);
        apply(l, r, o, 2*x+1, m, rx);
        push(2*x), push(2*x+1);
        arr[x] = combine(arr[2 * x], arr[2*x+1]);
    }
    void apply(ll l, ll r, operation o) {
        apply(l, r, o, 1, 0, size);
    }
    data query(int l, int r, int x, int lx, int rx) {
        push(x);
        if (l <= lx && rx <= r) { return arr[x]; }
        if (rx <= l || r <= lx) { return -inf; }
        int m = ( lx + rx ) / 2;
        data lv = query(l, r, 2 * x, lx, m);
        data rv = query(l, r, 2*x+1, m, rx);
        return combine(lv, rv);
    }
    data query(int l, int r){
        return query(l, r, 1, 0, size);
    }
};

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

    cin >> N[0] >> N[1];
    for (int j = 0; j < 2; ++j) {
        for (int i = 0; i < N[j]; ++i) cin >> A[j][i] >> T[j][i] >> P[j][i];
        partial_sum(A[j], A[j]+N[j], A[j]); // A ist eine Präfixsumme
        for(int i = 0; i < N[j]; ++i) T[j][i] -= A[j][i]; // Wie viel darf ich vom anderen machen, ich keine Punkte bekomme?
    }

    // Segmentbaum auf N[1] aufgebaut
    segtree seg = segtree(N[1]+1);
    // Index shift bei j um 1!
    // init 0th layer:
    ll points = 0;
    priority_queue<pii, vpii, greater<pii>> q;
    for (int j = 0; j < N[1]; ++j) {
        if (T[1][j] >= 0) {
            points += P[1][j];
            q.push({ T[1][j], j });
        }
    }
    seg.apply(0, N[1]+1, { points, -inf });
    // ernst
    for (int i = 0; i < N[0]; ++i) {
        vi cuts;
        while (!q.empty() && q.top().first < A[0][i]) {
            int j = q.top().second;  q.pop();
            seg.apply(0, j+1, { - P[1][j], -inf });
            cuts.push_back(j+1);
            // for (int i = 0; i <= N[1]; ++i) cout << seg.query(i, i+1) << " "; cout << endl;
        }
        if (T[0][i] >= 0) {
            ll r = upper_bound(A[1], A[1] + N[1], T[0][i]) - A[1];
            seg.apply(0, r+1, { P[0][i], -inf });
            cuts.push_back(r+1);
            // for (int i = 0; i <= N[1]; ++i) cout << seg.query(i, i+1) << " "; cout << endl;
        }
        for (int x : cuts) {
            data v = seg.query(0, x);
            seg.apply(x, N[1]+1, { 0, v });
        }
    }
    cout << seg.query(0, N[1]+1) << "\n";
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 3
• Subtask 3: 0 / 7
• Subtask 4: 0 / 39
• Subtask 5: 0 / 11
• Subtask 6: 0 / 9
• Subtask 7: 0 / 17
• Subtask 8: 0 / 9