Submission #1048966

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048966		nisanduu	Distributing Candies (IOI21_candies)	C++17	0 / 100	5085 ms	29784 KiB

candies

#include "candies.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

class SGT {
public:
    vector<ll> seg, arr, lazy, cap;
    
    SGT(ll n, vector<ll> v, vector<ll> c) {
        seg.resize(4 * n + 3);
        lazy.resize(4 * n + 3);
        arr = v;
        cap = c;
    }

    void build(ll l, ll r, ll ind) {
        if (l == r) {
            seg[ind] = arr[l];
            return;
        }
        ll mid = (l + r) / 2;
        build(l, mid, 2 * ind + 1);
        build(mid + 1, r, 2 * ind + 2);
        seg[ind] = seg[2 * ind + 1] + seg[2 * ind + 2];
    }

    void propagate(ll l, ll r, ll ind) {
        if (lazy[ind] != 0) {
            for (ll i = l; i <= r; ++i) {
                seg[ind] = min(cap[i], seg[ind] + lazy[ind]);
            }
            if (l != r) {
                lazy[2 * ind + 1] += lazy[ind];
                lazy[2 * ind + 2] += lazy[ind];
            }
            lazy[ind] = 0;
        }
    }

    ll query(ll l, ll r, ll ind, ll pos) {
        propagate(l, r, ind);
        if (l == r) {
            return seg[ind];
        }
        ll mid = (l + r) / 2;
        if (mid >= pos) return query(l, mid, 2 * ind + 1, pos);
        else return query(mid + 1, r, 2 * ind + 2, pos);
    }

    void update(ll l, ll r, ll ind, ll left, ll right, ll val) {
        propagate(l, r, ind);
        if (r < left || l > right) return;
        if (l >= left && r <= right) {
            for (ll i = l; i <= r; ++i) {
                seg[ind] = min(cap[i], seg[ind] + val);
            }
            if (l != r) {
                lazy[2 * ind + 1] += val;
                lazy[2 * ind + 2] += val;
            }
            return;
        }
        ll mid = (l + r) / 2;
        update(l, mid, 2 * ind + 1, left, right, val);
        update(mid + 1, r, 2 * ind + 2, left, right, val);
        seg[ind] = seg[2 * ind + 1] + seg[2 * ind + 2];
    }
};

vector<int> distribute_candies(vector<int> c, vector<int> l,
                                vector<int> r, vector<int> v) {
    int n = c.size();
    int q = l.size();
    vector<ll> vec(n + 1, 0);
    SGT sg(n, vec, vector<ll>(c.begin(), c.end()));
    sg.build(0, n - 1, 0);

    for (ll i = 0; i < q; i++) {
        sg.update(0, n - 1, 0, l[i], r[i], v[i]);
    }

    vector<int> s(n);
    for (ll i = 0; i < n; i++) {
        s[i] = sg.query(0, n - 1, 0, i);
    }

    return s;
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 8
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 33