답안 #848916

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
848916 2023-09-13T17:37:39 Z mickey080929 Sushi (JOI16_sushi) C++17
15 / 100
1695 ms 98156 KB
#include <bits/stdc++.h>

#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

#define sz(x) (int)(x).size()

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;

const int inf = 1e9;
const int B = 640;

struct LazySegmentTree{
    int tree[B*4+100];
    int lazy[B*4+100];
    void init(int n) {
        fill(tree, tree+n*4+10, inf);
        fill(lazy, lazy+n*4+10, 0);
    }
    void propagate(int node, int s, int e) {
        if (!lazy[node]) return;
        tree[node] += lazy[node];
        if (s != e) {
            lazy[node<<1] += lazy[node];
            lazy[node<<1|1] += lazy[node];
        }
        lazy[node] = 0;
    }
    void update_point(int node, int s, int e, int tar, int val) {
        propagate(node, s, e);
        if (s > tar || tar > e) return;
        if (s == e) {
            tree[node] = val;
            return;
        }
        int mid = s + e >> 1;
        update_point(node<<1, s, mid, tar, val);
        update_point(node<<1|1, mid+1, e, tar, val);
        tree[node] = min(tree[node<<1], tree[node<<1|1]);
    }
    void update_range(int node, int s, int e, int l, int r, int val) {
        propagate(node, s, e);
        if (l > e || s > r) return;
        if (l <= s && e <= r) {
            lazy[node] = val;
            propagate(node, s, e);
            return;
        }
        int mid = s + e >> 1;
        update_range(node<<1, s, mid, l, r, val);
        update_range(node<<1|1, mid+1, e, l, r, val);
        tree[node] = min(tree[node<<1], tree[node<<1|1]);
    }
    int getmin() { return tree[1]; }
};

struct Bucket{
    LazySegmentTree seg;
    priority_queue<int> pq;
    vector<int> queries;
    vector<int> a;
    vector<int> use;
    vector<int> nxt;
    void init() {
        pq = priority_queue<int>(a.begin(), a.end());
        use.clear();
        int cur = 0;
        for (int i=0; i<sz(a); i++) {
            if (cur <= a[i]) {
                cur = a[i];
                use.push_back(i);
            }
        }
        seg.init(sz(use));
        nxt.clear();
        nxt.resize(sz(use));
        cur = 0;
        for (int i=0; i<sz(use); i++) {
            int r = sz(a);
            if (i + 1 < sz(use)) r = use[i+1];
            if (use[i] + 1 >= r) {
                nxt[i] = cur;
                continue;
            }
            int idx = max_element(a.begin()+use[i], a.begin()+r) - a.begin();
            if (cur >= a[idx]) {
                nxt[i] = cur;
                continue;
            }
            cur = a[idx];
            nxt[i] = cur;
            int lo = 0, hi = sz(use) - 1;
            while (lo < hi) {
                int mid = lo + hi >> 1;
                if (a[mid] <= cur) lo = mid + 1;
                else hi = mid;
            }
            seg.update_point(1, 1, sz(use), i+1, i+1 - lo);
        }
    }
    void apply() {
        vector<int> t;
        for (auto &x : queries) {
            int idx = lower_bound(nxt.begin(), nxt.end(), x) - nxt.begin();
            seg.update_range(1, 1, sz(use), idx+1, sz(use), -1);
            if (true || seg.getmin() <= 0) {
                for (auto &p : use) t.push_back(a[p]);
                sort(t.begin(), t.end());
                assert(sz(t) == sz(use));
                for (int i=0; i<sz(use); i++) a[use[i]] = t[i];
                t.clear();
                int cur = x;
                for (int i=0; i<sz(a); i++) if (cur <= a[i]) swap(cur, a[i]);
                init();
            } else t.push_back(x);
        }
        for (auto &p : use) t.push_back(a[p]);
        sort(t.begin(), t.end());
        for (int i=0; i<sz(use); i++) a[use[i]] = t[i];
        queries.clear();
        init();
    }
    int Push(int x) {
        queries.push_back(x);
        pq.push(x);
        int t = pq.top();
        pq.pop();
        return t;
    }
} buc[B];

int n, q;
int a[400010];

int query(int l, int r, int x) {
    int lb = l / B;
    int rb = r / B;
    buc[lb].apply();
    for (int i=l; i<=min({r, n-1, lb*B+B-1}); i++) {
        if (x < buc[lb].a[i-lb*B]) {
            swap(x, buc[lb].a[i-lb*B]);
        }
    }
    if (lb == rb) return x;
    for (int i=lb+1; i<=rb-1; i++) {
        x = buc[i].Push(x);
    }
    buc[rb].apply();
    for (int i=rb*B; i<=min(n-1, r); i++) {
        if (x < buc[rb].a[i-rb*B]) {
            swap(x, buc[rb].a[i-rb*B]);
        }
    }
    return x;
}

int main() {
    scanf("%d %d", &n, &q);
    for (int i=0; i<n; i++) {
        scanf("%d", &a[i]);
        buc[i/B].a.push_back(a[i]);
    }
    for (int i=0; i<=(n-1)/B; i++) {
        buc[i].init();
    }
    while (q --) {
        int l, r, x;
        scanf("%d %d %d", &l, &r, &x);
        l --; r --;
        if (l <= r) printf("%d\n", query(l, r, x));
        else printf("%d\n", query(0, r, query(l, n-1, x)));
    }

    return 0;
}

Compilation message

sushi.cpp: In member function 'void LazySegmentTree::update_point(int, int, int, int, int)':
sushi.cpp:41:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |         int mid = s + e >> 1;
      |                   ~~^~~
sushi.cpp: In member function 'void LazySegmentTree::update_range(int, int, int, int, int, int)':
sushi.cpp:54:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   54 |         int mid = s + e >> 1;
      |                   ~~^~~
sushi.cpp: In member function 'void Bucket::init()':
sushi.cpp:99:30: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   99 |                 int mid = lo + hi >> 1;
      |                           ~~~^~~~
sushi.cpp: In function 'int main()':
sushi.cpp:163:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  163 |     scanf("%d %d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~~
sushi.cpp:165:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  165 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~
sushi.cpp:173:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  173 |         scanf("%d %d %d", &l, &r, &x);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
# 결과 실행 시간 메모리 Grader output
1 Incorrect 69 ms 14940 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Correct 1695 ms 93460 KB Output is correct
2 Correct 1680 ms 93484 KB Output is correct
3 Correct 1138 ms 95744 KB Output is correct
4 Correct 1651 ms 93520 KB Output is correct
5 Correct 1165 ms 98156 KB Output is correct
6 Correct 1613 ms 96028 KB Output is correct
7 Correct 1600 ms 96340 KB Output is correct
8 Correct 1526 ms 97768 KB Output is correct
9 Correct 1183 ms 97688 KB Output is correct
10 Correct 1228 ms 97876 KB Output is correct
11 Correct 1299 ms 97768 KB Output is correct
12 Correct 1298 ms 97908 KB Output is correct
13 Correct 1658 ms 93776 KB Output is correct
14 Correct 1678 ms 93568 KB Output is correct
15 Correct 1168 ms 95696 KB Output is correct
16 Correct 1635 ms 93780 KB Output is correct
17 Correct 1242 ms 97876 KB Output is correct
18 Correct 1575 ms 96188 KB Output is correct
19 Correct 1576 ms 96600 KB Output is correct
20 Correct 1489 ms 98028 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Incorrect 69 ms 14940 KB Output isn't correct
2 Halted 0 ms 0 KB -