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답안 #1012928

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1012928 2024-07-02T20:15:32 Z EJIC_B_KEDAX Fire (JOI20_ho_t5) C++17
100 / 100
 237 ms 65608 KB 
#include <bits/stdc++.h>
#include <immintrin.h>

using namespace std;

using ll = long long;
using ld = long double;
#define x first
#define y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()

mt19937 mt(123);

void solve();
void init();

int32_t main() {
#ifndef LOCAL
    cin.tie(nullptr)->sync_with_stdio(false);
#endif
    cout << fixed << setprecision(30);
    init();
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }
}

struct segment_tree {
    vector<ll> st;
    int sz;
    segment_tree() = default;
    segment_tree(vector<int> a) {
        sz = 1;
        while (sz < a.size()) {
            sz <<= 1;
        }
        st.resize(2 * sz, 0);
        for (int i = 0; i < a.size(); i++) {
            st[sz + i] = a[i];
        }
        for (int i = sz - 1; i > 0; i--) {
            st[i] = st[2 * i] + st[2 * i + 1];
        }
    }
    void add(int i, ll x) {
        i += sz;
        while (i) {
            st[i] += x;
            i >>= 1;
        }
    }
    ll get(int l, int r) {
        l += sz;
        r += sz;
        ll res = 0;
        while (l <= r) {
            if (l & 1) {
                res += st[l++];
            }
            if (~r & 1) {
                res += st[r--];
            }
            l >>= 1;
            r >>= 1;
        }
        return res;
    }
};

struct mseg_tree {
    segment_tree def, step;
    int now_step;
    mseg_tree() = default;
    mseg_tree(int n) {
        now_step = 0;
        def = segment_tree(vector<int>(n, 0));
        step = segment_tree(vector<int>(n, 0));
    }
    void add_def(int i, int x) {
        def.add(i, x);
    }
    void add_step(int i, int x) {
        step.add(i, x);
        def.add(i, -1ll * x * now_step);
    }
    void next_step() {
        now_step++;
    }
    void set_step(int new_step) {
        now_step = new_step;
    }
    ll get(int l, int r) {
        return def.get(l, r) + now_step * step.get(l, r);
    }
};

struct sparse_max {
    using Type = pair<int, int>;
    vector<vector<Type>> sp;
    vector<int> p;
    sparse_max(const vector<Type>& a) {
        int n = a.size(), lg = 1;
        while ((1 << lg) < n) {
            lg++;
        }
        sp.resize(lg, vector<Type>(n));
        for (int i = 0; i < n; i++) {
            sp[0][i] = a[i];
        }
        for (int l = 1; l < lg; l++) {
            for (int i = 0; i <= n - (1 << l); i++) {
                sp[l][i] = max(sp[l - 1][i], sp[l - 1][i + (1 << (l - 1))]);
            }
        }
        int nw = 0;
        p.resize(n + 1, 0);
        for (int i = 1; i <= n; i++) {
            if ((1 << nw) * 2 < i) {
                nw++;
            }
            p[i] = nw;
        }
    }
    Type get(int l, int r) {
        int lev = p[r - l + 1];
        return max(sp[lev][l], sp[lev][r - (1 << lev) + 1]);
    }
};

struct sparse_min {
    using Type = pair<int, int>;
    vector<vector<Type>> sp;
    vector<int> p;
    sparse_min(const vector<Type>& a) {
        int n = a.size(), lg = 1;
        while ((1 << lg) < n) {
            lg++;
        }
        sp.resize(lg, vector<Type>(n));
        for (int i = 0; i < n; i++) {
            sp[0][i] = a[i];
        }
        for (int l = 1; l < lg; l++) {
            for (int i = 0; i <= n - (1 << l); i++) {
                sp[l][i] = min(sp[l - 1][i], sp[l - 1][i + (1 << (l - 1))]);
            }
        }
        int nw = 0;
        p.resize(n + 1, 0);
        for (int i = 1; i <= n; i++) {
            if ((1 << nw) * 2 < i) {
                nw++;
            }
            p[i] = nw;
        }
    }
    Type get(int l, int r) {
        int lev = p[r - l + 1];
        return min(sp[lev][l], sp[lev][r - (1 << lev) + 1]);
    }
};

void init() {}

void solve() {
    int n, q;
    cin >> n >> q;
    vector<int> a(n), nxt(n), prv(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    // assert(n == 1);
    mseg_tree st(n);
    for (int i = 0; i < n; i++) {
        st.add_step(i, a[i]);
    }
    vector<pair<int, int>> stack(1, {INT32_MAX, n});
    for (int i = n - 1; i >= 0; i--) {
        while (a[i] >= stack.back().x) {
            stack.pop_back();
        }
        nxt[i] = stack.back().y;
        stack.emplace_back(a[i], i);
    }
    stack.clear(); stack.emplace_back(INT32_MAX, -1);
    for (int i = 0; i < n; i++) {
        while (a[i] > stack.back().x) {
            stack.pop_back();
        }
        prv[i] = stack.back().y;
        stack.emplace_back(a[i], i);
    }
    vector<pair<int, int>> fsp(n);
    for (int i = 0; i < n; i++) {
        fsp[i] = {a[i], -i};
    }
    sparse_max sp(fsp);
    vector<pair<int, pair<int, int>>> ev;
    vector<pair<int, int>> qu;
    vector<pair<int, int>> seg(q);
    vector<ll> ans(q);
    for (int i = 0; i < q; i++) {
        int t, l, r;
        cin >> t >> l >> r; l--; r--;
        qu.emplace_back(t, i);
        seg[i] = {l, r};
    }
    for (int i = 0; i < n; i++) {
        ev.emplace_back(nxt[i] - i, make_pair(i, -a[i]));
        if (prv[i] != -1) {
            ev.emplace_back(i - prv[i], make_pair(i, -a[i]));
            ev.emplace_back(nxt[i] - prv[i], make_pair(i, a[i]));
        }
    }
    sort(all(ev));
    sort(all(qu));
    int ptrev = 0, ptrqu = 0;
    for (int t = 0; t <= n; t++) {
        while (ptrev < ev.size() && ev[ptrev].x == t) {
            st.add_step(ev[ptrev].y.x, ev[ptrev].y.y);
            ptrev++;
        }
        st.next_step();
        while (ptrqu < qu.size() && qu[ptrqu].x == t) {
            int i = qu[ptrqu++].y;
            auto [l, r] = seg[i];
            r++;
            ll lans = 0, rans = 0;
            {
                auto [mx, mxi] = sp.get(max(0, l - t), l);
                mxi *= -1;
                lans = st.get(mxi + 1, n - 1);
                int lst = min({mxi + t, nxt[mxi] - 1});
                lans += 1ll * (lst - l + 1) * mx;
            }
            if (r < n) {
                auto [mx, mxi] = sp.get(max(0, r - t), r);
                mxi *= -1;
                rans = st.get(mxi + 1, n - 1);
                int lst = min(mxi + t, nxt[mxi] - 1);
                rans += 1ll * (lst - r + 1) * mx;
            }
            ans[i] = lans - rans;
        }
    }
    for (ll i : ans) {
        cout << i << '\n';
    }
}

Compilation message

ho_t5.cpp: In constructor 'segment_tree::segment_tree(std::vector<int>)':
ho_t5.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         while (sz < a.size()) {
      |                ~~~^~~~~~~~~~
ho_t5.cpp:41:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         for (int i = 0; i < a.size(); i++) {
      |                         ~~^~~~~~~~~~
ho_t5.cpp: In function 'void solve()':
ho_t5.cpp:222:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  222 |         while (ptrev < ev.size() && ev[ptrev].x == t) {
      |                ~~~~~~^~~~~~~~~~~
ho_t5.cpp:227:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  227 |         while (ptrqu < qu.size() && qu[ptrqu].x == t) {
      |                ~~~~~~^~~~~~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 456 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 192 ms 65368 KB Output is correct
3 Correct 204 ms 64880 KB Output is correct
4 Correct 190 ms 65088 KB Output is correct
5 Correct 191 ms 63928 KB Output is correct
6 Correct 179 ms 65088 KB Output is correct
7 Correct 202 ms 65556 KB Output is correct
8 Correct 178 ms 64020 KB Output is correct
9 Correct 190 ms 65516 KB Output is correct
10 Correct 186 ms 64892 KB Output is correct
11 Correct 178 ms 63828 KB Output is correct
12 Correct 175 ms 64692 KB Output is correct
13 Correct 178 ms 63484 KB Output is correct
14 Correct 174 ms 63528 KB Output is correct
15 Correct 175 ms 63676 KB Output is correct
16 Correct 175 ms 65148 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 207 ms 65128 KB Output is correct
3 Correct 186 ms 64536 KB Output is correct
4 Correct 201 ms 64176 KB Output is correct
5 Correct 206 ms 64868 KB Output is correct
6 Correct 206 ms 65208 KB Output is correct
7 Correct 206 ms 63432 KB Output is correct
8 Correct 197 ms 65012 KB Output is correct
9 Correct 200 ms 64592 KB Output is correct
10 Correct 188 ms 64144 KB Output is correct
11 Correct 200 ms 63920 KB Output is correct
12 Correct 206 ms 63676 KB Output is correct
13 Correct 201 ms 63684 KB Output is correct
14 Correct 204 ms 64636 KB Output is correct
15 Correct 201 ms 63884 KB Output is correct
16 Correct 199 ms 63676 KB Output is correct

Subtask #4
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 206 ms 59768 KB Output is correct
2 Correct 206 ms 64100 KB Output is correct
3 Correct 217 ms 63412 KB Output is correct
4 Correct 208 ms 63892 KB Output is correct
5 Correct 198 ms 64144 KB Output is correct
6 Correct 217 ms 64348 KB Output is correct
7 Correct 236 ms 62980 KB Output is correct
8 Correct 217 ms 64596 KB Output is correct
9 Correct 213 ms 64224 KB Output is correct
10 Correct 207 ms 64588 KB Output is correct
11 Correct 223 ms 64396 KB Output is correct
12 Correct 218 ms 64356 KB Output is correct
13 Correct 213 ms 64368 KB Output is correct
14 Correct 223 ms 64320 KB Output is correct

Subtask #5
80.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 456 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 192 ms 65368 KB Output is correct
34 Correct 204 ms 64880 KB Output is correct
35 Correct 190 ms 65088 KB Output is correct
36 Correct 191 ms 63928 KB Output is correct
37 Correct 179 ms 65088 KB Output is correct
38 Correct 202 ms 65556 KB Output is correct
39 Correct 178 ms 64020 KB Output is correct
40 Correct 190 ms 65516 KB Output is correct
41 Correct 186 ms 64892 KB Output is correct
42 Correct 178 ms 63828 KB Output is correct
43 Correct 175 ms 64692 KB Output is correct
44 Correct 178 ms 63484 KB Output is correct
45 Correct 174 ms 63528 KB Output is correct
46 Correct 175 ms 63676 KB Output is correct
47 Correct 175 ms 65148 KB Output is correct
48 Correct 207 ms 65128 KB Output is correct
49 Correct 186 ms 64536 KB Output is correct
50 Correct 201 ms 64176 KB Output is correct
51 Correct 206 ms 64868 KB Output is correct
52 Correct 206 ms 65208 KB Output is correct
53 Correct 206 ms 63432 KB Output is correct
54 Correct 197 ms 65012 KB Output is correct
55 Correct 200 ms 64592 KB Output is correct
56 Correct 188 ms 64144 KB Output is correct
57 Correct 200 ms 63920 KB Output is correct
58 Correct 206 ms 63676 KB Output is correct
59 Correct 201 ms 63684 KB Output is correct
60 Correct 204 ms 64636 KB Output is correct
61 Correct 201 ms 63884 KB Output is correct
62 Correct 199 ms 63676 KB Output is correct
63 Correct 206 ms 59768 KB Output is correct
64 Correct 206 ms 64100 KB Output is correct
65 Correct 217 ms 63412 KB Output is correct
66 Correct 208 ms 63892 KB Output is correct
67 Correct 198 ms 64144 KB Output is correct
68 Correct 217 ms 64348 KB Output is correct
69 Correct 236 ms 62980 KB Output is correct
70 Correct 217 ms 64596 KB Output is correct
71 Correct 213 ms 64224 KB Output is correct
72 Correct 207 ms 64588 KB Output is correct
73 Correct 223 ms 64396 KB Output is correct
74 Correct 218 ms 64356 KB Output is correct
75 Correct 213 ms 64368 KB Output is correct
76 Correct 223 ms 64320 KB Output is correct
77 Correct 200 ms 65376 KB Output is correct
78 Correct 223 ms 65608 KB Output is correct
79 Correct 208 ms 63928 KB Output is correct
80 Correct 208 ms 64880 KB Output is correct
81 Correct 204 ms 64696 KB Output is correct
82 Correct 202 ms 65344 KB Output is correct
83 Correct 221 ms 65108 KB Output is correct
84 Correct 196 ms 64684 KB Output is correct
85 Correct 215 ms 63668 KB Output is correct
86 Correct 196 ms 64940 KB Output is correct
87 Correct 229 ms 64040 KB Output is correct
88 Correct 193 ms 63916 KB Output is correct
89 Correct 188 ms 64652 KB Output is correct
90 Correct 208 ms 63940 KB Output is correct
91 Correct 182 ms 65120 KB Output is correct
92 Correct 203 ms 64540 KB Output is correct
93 Correct 216 ms 65580 KB Output is correct
94 Correct 203 ms 64244 KB Output is correct
95 Correct 209 ms 64196 KB Output is correct
96 Correct 202 ms 65368 KB Output is correct
97 Correct 205 ms 65376 KB Output is correct
98 Correct 212 ms 64628 KB Output is correct
99 Correct 237 ms 65092 KB Output is correct
100 Correct 229 ms 65244 KB Output is correct
101 Correct 216 ms 64864 KB Output is correct
102 Correct 216 ms 63680 KB Output is correct