Submission #944900

#	Time	Username	Problem	Language	Result	Execution time	Memory
944900		LOLOLO	Two Dishes (JOI19_dishes)	C++17	100 / 100	3348 ms	279116 KiB

dishes

#include <bits/stdc++.h>
typedef long long ll;

#define           f    first
#define           s    second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (int)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)

using namespace std;
const int N = 1e6 + 10;
ll A[N], B[N], SA[N], SB[N], S[N], T[N], Q[N], P[N];
vector <pair <ll, ll>> pos[N];

struct ST{
    vector <ll> seg, laz;
    ST(int n) {
        for (int i = 0; i <= n * 4 + 100; i++) {
            seg.pb(0);
            laz.pb(0);
        }
    }

    void push(int id) {
        ll &t = laz[id];
        laz[id * 2] += t;
        laz[id * 2 + 1] += t;
        seg[id * 2] += t;
        seg[id * 2 + 1] += t;
        t = 0;
    }

    void upd(int id, int l, int r, int u, int v, ll t) {
        if (l > v || r < u)
            return;

        if (l >= u && r <= v) {
            laz[id] += t;
            seg[id] += t;
            return;
        }

        push(id);
        int m = (l + r) / 2;
        upd(id * 2, l, m, u, v, t);
        upd(id * 2 + 1, m + 1, r, u, v, t);
        seg[id] = max(seg[id * 2], seg[id * 2 + 1]);
    }

    void point(int id, int l, int r, int p, ll v) {
        if (l > p || r < p)
            return;

        if (l == r) {
            seg[id] = max(seg[id], v);
            return;
        }

        push(id);
        int m = (l + r) / 2;
        point(id * 2, l, m, p, v);
        point(id * 2 + 1, m + 1, r, p, v);
        seg[id] = max(seg[id * 2], seg[id * 2 + 1]);
    }

    ll get(int id, int l, int r, int u, int v) {
        if (u > v || l > v || r < u)
            return -1e18;

        if (l >= u && r <= v)
            return seg[id];

        push(id);
        int m = (l + r) / 2;
        return max(get(id * 2, l, m, u, v), get(id * 2 + 1, m + 1, r, u, v));
    }
};

vector <pair <ll, ll>> compress(vector < pair <ll, ll>> &v) {
    vector <pair <ll, ll>> st;
    for (auto x : v) {
        if (st.empty() || st.back().f != x.f) {
            st.pb(x);
        } else {
            st[sz(st) - 1].s += x.s;
        }
    }
    return st;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    ll ans = 0;
    int n, m;
    cin >> n >> m;

    for (int i = 1; i <= n; i++) {
        cin >> A[i] >> S[i] >> P[i];
        SA[i] = SA[i - 1] + A[i];
    }

    for (int i = 1; i <= m; i++) {
        cin >> B[i] >> T[i] >> Q[i];
        SB[i] = SB[i - 1] + B[i];
    }

    for (int i = 1; i <= n; i++) {
        if (SA[i] > S[i])
            continue;

        ans += P[i];
        int id = upper_bound(SB, SB + 1 + m, S[i] - SA[i]) - SB - 1;
        if (id < m)
            pos[i - 1].pb({id + 1, -P[i]});
    }

    for (int i = 1; i <= m; i++) {
        if (SB[i] > T[i])
            continue;

        int id = upper_bound(SA, SA + 1 + n, T[i] - SB[i]) - SA - 1;
        pos[id].pb({i, Q[i]});
    }

    for (int i = 0; i <= n; i++) {
        sort(all(pos[i]));
        pos[i] = compress(pos[i]);
    }

    ST seg(m + 10);

    int lx = 0;
    for (int i = 0; i <= n; i++) {
        ll cur = 0;
        for (auto x : pos[i]) {
            cur += x.s;
        }

        if (sz(pos[i])) {
            lx = pos[i].back().f;
        } else {
            lx = 0;
        }

        vector <pair <ll, ll>> save;
        for (int j = sz(pos[i]) - 1; j >= 0; j--) {
            ll t = seg.get(1, 0, m, 0, pos[i][j].f) + cur;
            save.pb({pos[i][j].f, t});
            seg.upd(1, 0, m, pos[i][j].f, m, pos[i][j].s);
            cur -= pos[i][j].s;
        }

        for (auto x : save) {
            seg.point(1, 0, m, x.f, x.s);
        }
    }

    cout << seg.get(1, 0, m, lx, m) + ans << '\n';
    return 0;
}

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