제출 #623707

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
623707		Loki_Nguyen	Two Dishes (JOI19_dishes)	C++14	100 / 100	4777 ms	299276 KiB

dishes

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define task "dfss"
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fi first
#define se second
#define ull unsigned long long
using namespace std;
const ll mod = 998244353;
const int N = 2e6 + 55;
const ll inf = 1e18;
vector<pll> adj[N];
ll pw(ll k, ll n)
{
    ll total = 1;
    for (; n; n >>= 1)
    {
        if (n & 1)
            total = total * k % mod;
        k = k * k % mod;
    }
    return total;
}
struct node
{
    ll x, s, p;
} a[N], b[N];
struct IT
{
    vector<ll> st;
    vector<pll> lazy;
    int n;
    IT(int _n)
    {
        n = _n;
        st.resize(n * 4 + 4, 0);
        lazy.resize(n * 4 + 4, make_pair(-inf, 0));
    }
    void add(pll& x, pll y)
    {
        if(y.fi != -inf)x.fi = max(x.fi, y.fi-x.se);
        x.se += y.se;
    }
    void down(int id)
    {
        if (lazy[id].fi == -inf && lazy[id].se == 0)return;
        st[id<<1] = max(st[id<<1], lazy[id].fi)+lazy[id].se;
        st[id << 1|1] = max(st[id << 1|1], lazy[id].fi) + lazy[id].se;
        add(lazy[id<<1], lazy[id]);
        add(lazy[id<<1|1], lazy[id]);
        lazy[id].fi = -inf;
        lazy[id].se = 0;
    }
    void update(int id, int l, int r, int u, int v, pll x)
    {
        if (u <= l && r <= v)
        {
            st[id] = max(st[id], x.fi)+x.se;
            add(lazy[id], x);
            return;
        }
        if (u > r || l > v)
            return;
        int mid = (l + r) >> 1;
        down(id);
        update(id << 1, l, mid, u, v, x);
        update(id << 1 | 1, mid + 1, r, u, v, x);
        st[id] = max(st[id << 1 | 1], st[id << 1]);
    }
    void update(int l, int r, pll x)
    {
        update(1, 0, n, l, r, x);
    }
    ll get(int id, int l, int r, int pos)
    {
        if (l == r)
            return st[id];
        int mid = (l + r) >> 1;
        down(id);
        if (pos <= mid)
            return get(id << 1, l, mid, pos);
        return get(id << 1 | 1, mid + 1, r, pos);
    }
    ll get(int pos)
    {
        return get(1, 0, n, pos);
    }
};
int n, m, t, k;
ll ans, c[N], sum;

void sol()
{
    cin >> n >> m;
    a[0].x = 0;
    b[0].x = 0;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i].x >> a[i].s >> a[i].p;
        a[i].x += a[i - 1].x;
    }
    for (int i = 1; i <= m; i++)
    {
        cin >> b[i].x >> b[i].s >> b[i].p;
        b[i].x += b[i - 1].x;
        int l = 1, r = n, mid;
        while (l <= r)
        {
            mid = (l + r) >> 1;
            if (a[mid].x + b[i].x <= b[i].s)
                l = mid + 1;
            else
                r = mid - 1;
        }
        if (a[r].x + b[i].x <= b[i].s)
        {
            ans += b[i].p;
            if (r < n)
            {
                // cout << r + 1 << " " << i - 1 << " " << -b[i].p << '\n';
                adj[r + 1].pb({i - 1, -b[i].p});
            }
        }
    }
    IT it(m);
    for (int i = 1; i <= n; i++)
    {
        int l = 1, r = m, mid;
        while (l <= r)
        {
            mid = (l + r) >> 1;
            if (b[mid].x + a[i].x <= a[i].s)
                l = mid + 1;
            else
                r = mid - 1;
        }
        if (b[r].x + a[i].x <= a[i].s)
        {
            adj[i].pb({r, a[i].p});
            // cout << i << " " << r << " " << a[i].p << '\n';
        }

        sort(adj[i].begin(), adj[i].end());
        k = adj[i].size();
        for (int j = 0; j < k;)
        {
            int pos = adj[i][j].fi;
            sum = 0;
            while (j < k && adj[i][j].fi == pos)
            {
                sum += adj[i][j].se;
                ++j;
            }
            // cout << i << " " << pos << " " << sum << ' ';
            it.update(0, pos, {-inf, sum});
            it.update(pos, (j == k ? m : adj[i][j].fi), {it.get(pos), 0});
            // cout << it.get(m) <<'\n';
        }
    }
    cout << ans + it.get(m);
}
int main()
{
    if (fopen(task ".inp", "r"))
    {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int ntest = 1;
    // cout << (1<<20);
    // cin >> ntest;
    while (ntest-- > 0)
        sol();
}
/*
 */

컴파일 시 표준 에러 (stderr) 메시지

dishes.cpp: In function 'int main()':
dishes.cpp:168:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  168 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
dishes.cpp:169:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  169 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• 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