oj.uz

Submission #560340

# Submission time Handle Problem Language Result Execution time Memory
560340 2022-05-11T10:08:44 Z kartel Distributing Candies (IOI21_candies) C++17
38 / 100
 5000 ms 64132 KB 
#include <bits/stdc++.h>

//#include "grader.cpp"
#include "candies.h"

#define F first
#define S second
#define pb push_back
#define sz(x) (int)x.size()
#define el "\n"
#define all(x) (x).begin(), (x).end()
using namespace std;
typedef long long ll;

struct st_beats {
    struct node {
        ll mx, mn;
        ll D, Dx;

        node() {
            mx = mn = D = 0;
            Dx = -2e9;
        }

        node operator +(node other) {
            node ret;

            ret.mx = max(mx, other.mx);
            ret.mn = min(mn, other.mn);
            return ret;
        }

        void mrg(node &a, node &b) {
            node x = a + b;
            mx = x.mx; mn = x.mn;
        }

        void add() {
            mx += D; mn += D;
        }

        void updL() {
            mx = mn = Dx;
            Dx = -2e9;
        }
    };

    vector <node> t;
    int n, h;

    st_beats() {}

    void init(int _n, int _h) {
        t.resize(8 * _n);
        for (int i = 0; i < sz(t); i++) {
            t[i] = node();
        }
        h = _h;
        n = _n;
    }

    void push(int v) {
        if (t[v].D) {
            t[v].add();
            t[v * 2].D += t[v].D;
            t[v * 2 + 1].D += t[v].D;
            t[v].D = 0;
        }
    }

    void pushL(int v) {
        if (t[v].Dx != -2e9) {
            t[v * 2].Dx = t[v].Dx;
            t[v * 2 + 1].Dx = t[v].Dx;
            t[v * 2].D = t[v * 2 + 1].D = 0;

            t[v].updL();
        }
    }

    void psh(int v) {
        pushL(v);
        push(v);
    }

    void upd(int v, int l, int r, int tl, int tr, int val) {
        psh(v);
        if (l > r || tl > tr || tl > r || l > tr) {
            return;
        }
        int md = (l + r) >> 1;
        if (l >= tl && r <= tr) {
            t[v].D += val;
            psh(v);
            return;
        }
        upd(v * 2, l, md, tl, tr, val);
        upd(v * 2 + 1, md + 1, r, tl, tr, val);
        t[v].mrg(t[v * 2], t[v * 2 + 1]);
    }

    void upd(int v, int l, int r, int x) {
        psh(v);

        if (t[v].mn > h) {
            t[v].Dx = h;
            psh(v);
            return;
        }
        if (t[v].mx < 0) {
            t[v].Dx = 0;
            psh(v);
            return;
        }

        if (l == r || (t[v].mn >= 0 && t[v].mx <= h)) {
            return;
        }

        int md = (l + r) >> 1;
        upd(v * 2, l, md, 0);
        upd(v * 2 + 1, md + 1, r, 0);
        t[v].mrg(t[v * 2], t[v * 2 + 1]);
    }

    void upd(int l, int r, int val) {
        upd(1, 0, n - 1, l, r, val);

        upd(1, 0, n - 1, 0);
    }

    int get(int v, int l, int r, int ps) {
        psh(v);
        if (l == r) {
            return t[v].mx;
        } else {
            int md = (l + r) >> 1;
            if (ps <= md) {
                return get(v * 2, l, md, ps);
            }
            return get(v * 2 + 1, md + 1, r, ps);
        }
    }

    int get(int x) {
        return get(1, 0, n - 1, x);
    }
} stb;

struct st_min {
    vector <ll> t;
    int n;

    st_min() {}

    void build(int v, int l, int r, vector <ll> &a) {
        if (l == r) {
            t[v] = abs(a[l]);
            return;
        } else {
            int md = (l + r) >> 1;
            build(v * 2, l, md, a);
            build(v * 2 + 1, md + 1, r, a);
            t[v] = min(t[v * 2], t[v * 2 + 1]);
        }
    }

    void init(vector <ll> &a) {
        n = sz(a);
        t.resize(8 * n);
        build(1, 0, n - 1, a);
    }

    void upd(int v, int l, int r, int ps, ll val) {
        if (l == r) {
            t[v] = val;
            return;
        } else {
            int md = (l + r) >> 1;
            if (ps <= md) {
                upd(v * 2, l, md, ps, val);
            } else {
                upd(v * 2 + 1, md + 1, r, ps, val);
            }
            t[v] = min(t[v * 2], t[v * 2 + 1]);
        }
    }

    int get(int v, int l, int r, ll c) {
        if (t[v] > c) {
            return -1;
        }
        if (l == r) {
            return l;
        }
        int md = (l + r) >> 1;
        int cur = get(v * 2, l, md, c);
        if (cur == -1) {
            return get(v * 2 + 1, md + 1, r, c);
        }
        return cur;
    }

    void upd(int ps, ll val) {
        upd(1, 0, n - 1, ps, val);
    }

    int get(ll c) {
        return get(1, 0, n - 1, c);
    }
};

vector <int> solve_st_beats(vector <int> &c, vector <int> &l, vector <int> &r, vector <int> &v) {
    int n = sz(c), q = sz(l);

    stb.init(n, c[0]);
    for (int i = 0; i < q; i++) {
        stb.upd(l[i], r[i], v[i]);
    }

    vector <int> a(n);
    for (int i = 0; i < n; i++) {
        a[i] = stb.get(i);
    }

    return a;
}

vector <int> solve_offline(vector <int> &c, vector <int> &l, vector <int> &r, vector <int> &v) {
    vector <ll> p = {v[0]};
    int q = sz(l), n = sz(c);
    vector <int> nxt(q, 0);
    set <pair <int, ll> > se;

    auto sg = [&](ll x) {
        if (x < 0) {
            return -1;
        }
        return 1;
    };

    for (int i = 1; i < q; i++) {
        if (sg(p.back()) == sg(v[i])) {
            p.back() += v[i];
        } else {
            p.pb(v[i]);
        }
    }
    if (p[0] < 0) {
        p.erase(p.begin());
    }
    q = sz(p);
    for (int i = 0; i < q; i++) {
        nxt[i] = i + 1;
        se.insert({i, p[i]});
    }

    vector <int> ind(n, 0);
    iota(all(ind), 0);
    sort(all(ind), [&](int i, int j) {return (c[i] < c[j]);});

    st_min tM;
    tM.init(p);

    vector <int> ans(n, 0);
    for (auto i : ind) {
        ll x = c[i];
        int j = tM.get(x);
        while (j != -1) {
            ll new_val = p[j];
            int was = j;
            se.erase({j, p[j]});
            vector <int> pos;
            while (nxt[j] < q && new_val >= 0 && new_val <= x) {
                j = nxt[j];
                pos.pb(j);
                se.erase({j, p[j]});
                new_val += p[j];
            }
            for (auto x : pos) {
                nxt[x] = j;
                tM.upd(x, 0);
            }
            if (was != j) {
                nxt[was] = j;
            }
            se.insert({was, new_val});
            tM.upd(was, abs(new_val));
            cerr << nxt[j] << el;
            if (nxt[j] == q) {
                break;
            }
            j = tM.get(x);
        }
        ll val = se.rbegin() -> S;
        if (val < 0) {
            ans[i] = max(0ll, x + val);
        } else {
            ans[i] = min(x, val);
        }
    }

    return ans;
}

vector <int> distribute_candies(vector <int> c, vector <int> l, vector <int> r, vector <int> v) {
    int n = sz(c), q = sz(l);

    if (n <= 2000 && q <= 2000) {
        vector <int> a(n, 0);

        for (int i = 0; i < q; i++) {
            for (int j = l[i]; j <= r[i]; j++) {
                a[j] += v[i];

                a[j] = max(a[j], 0);
                a[j] = min(a[j], c[j]);
            }
        }
        return a;
    } else {
        bool g = 1;
        for (int i = 0; i < q; i++) {
            g &= (v[i] > 0);
        }

        if (g) {
            vector <ll> pf(n, 0);
            vector <int> a(n, 0);

            for (int i = 0; i < q; i++) {
                pf[l[i]] += v[i];
                if (r[i] + 1 < n) {
                    pf[r[i] + 1] -= v[i];
                }
            }

            for (int i = 1; i < n; i++) {
                pf[i] += pf[i - 1];
            }
            for (int i = 0; i < n; i++) {
                a[i] = min(max(0ll, pf[i]), (ll)c[i]);
            }

            return a;
        } else {
            bool eq_c = 1;

            for (int i = 1; i < n; i++) {
                eq_c &= (c[i] == c[0]);
            }

            if (eq_c) {
                return solve_st_beats(c, l, r, v);
            }
            return solve_offline(c, l, r, v);
        }
    }
}

/*
3
10 15 13

2
0 2  20
0 2 -11

*/

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 113 ms 13736 KB Output is correct
2 Correct 107 ms 12976 KB Output is correct
3 Correct 97 ms 12756 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 171 ms 8656 KB Output is correct
3 Correct 94 ms 56092 KB Output is correct
4 Correct 375 ms 63360 KB Output is correct
5 Correct 465 ms 63648 KB Output is correct
6 Correct 572 ms 64132 KB Output is correct
7 Correct 519 ms 63600 KB Output is correct

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Execution timed out 5036 ms 32848 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 113 ms 13736 KB Output is correct
7 Correct 107 ms 12976 KB Output is correct
8 Correct 97 ms 12756 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 171 ms 8656 KB Output is correct
11 Correct 94 ms 56092 KB Output is correct
12 Correct 375 ms 63360 KB Output is correct
13 Correct 465 ms 63648 KB Output is correct
14 Correct 572 ms 64132 KB Output is correct
15 Correct 519 ms 63600 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Execution timed out 5036 ms 32848 KB Time limit exceeded
19 Halted 0 ms 0 KB -