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답안 #396440

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
396440 2021-04-30T00:37:06 Z 12tqian 푸드 코트 (JOI21_foodcourt) C++17
24 / 100
 486 ms 158344 KB 
#include <bits/stdc++.h>

using namespace std;

#define f1r(i, a, b) for (int i = a; i < b; ++i)
#define f0r(i, a) f1r(i, 0, a)
#define each(t, a) for (auto& t : a)

#define mp make_pair
#define f first
#define s second
#define pb push_back
#define eb emplace_back
#define sz(x) (int)(x).size()
#define all(x) begin(x), end(x)

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;

template <class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template <class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }

const int N = 5e5 + 5;

 

struct SumSeg {
    vl lz;
    vl st;
    int sz;

    void init(int n) {
        sz = 1;
        while (sz < n) sz <<= 1;
        lz.assign(2 * sz, 0);
        st.assign(2 * sz, 0);
    }

    void pull(int i) {
        st[i] = st[2 * i] + st[2 * i + 1];
    }

    void push(int i, int l, int r) {
        st[i] += (r - l + 1) * lz[i];
        if (l != r) { 
            lz[2 * i] += lz[i];
            lz[2 * i + 1] += lz[i];
        }
        lz[i] = 0;
    }

    void upd(int lo, int hi, ll inc, int i = 1, int l = 0, int r = -1) {
        if (r == -1) r += sz;
        push(i, l, r);
        if (hi < l || r < lo) return;
        if (lo <= l && r <= hi) {
            lz[i] = inc;
            push(i, l, r);
            return;
        }
        int m = (l + r) >> 1;
        upd(lo, hi, inc, 2 * i, l, m);
        upd(lo, hi, inc, 2 * i + 1, m + 1, r);
        pull(i);
    }

    ll query(int lo, int hi, int i = 1, int l = 0, int r = -1) {
        if (r == -1) r += sz;
        push(i, l, r);
        if (hi < l || r < lo) return 0;
        if (lo <= l && r <= hi) return st[i];
        int m = (l + r) >> 1;
        return query(lo, hi, 2 * i, l, m) + query(lo, hi, 2 * i + 1, m + 1, r);
    }
};

template <class C> struct SegmentTreeBeats {
    using T = std::pair<std::pair<C, C>, int>;
    const C INF = std::numeric_limits<C>::max();
    std::vector<C> mx_mod, mn_mod, mod, sum;
    std::vector<T> mx, mn;
    int sz; 

    void init(int sz_) {
        sz = 1; 
        while (sz < sz_) sz *= 2;
        mx_mod.assign(2 * sz, 0);
        mn_mod.assign(2 * sz, 0);
        mod.assign(2 * sz, 0);
        sum.assign(2 * sz, 0);
        mx.assign(2 * sz, {{0, 0}, 0});
        mn.assign(2 * sz, {{0, 0}, 0});
        build();
    }

    void build(int ind = 1, int L = 0, int R = -1) {
        if (R == -1) R += sz;
        mx_mod[ind] = INF, mn_mod[ind] = -INF, mod[ind] = 0;
        if (L == R) {
            mx[ind] = {{0, -INF}, 1};
            mn[ind] = {{0, INF}, 1};
            sum[ind] = 0;
            return;
        }
        int M = (L + R) / 2;
        build(2 * ind, L, M); build(2 * ind + 1, M + 1, R);
        pull(ind);
    }

    T comb_mn(T a, T b) {
        if (a > b) 
            std::swap(a, b);
        if (a.first.first == b.first.first) 
            return  {{a.first.first, 
                std::min(a.first.second, b.first.second)}, 
                a.second + b.second};
        return {{a.first.first, std::min(a.first.second, b.first.first)}, a.second};
    }

    T comb_mx(T a, T b) {
        if (a < b) std::swap(a, b);
        if (a.first.first == b.first.first) 
            return  {{a.first.first, 
                std::max(a.first.second, b.first.second)}, 
                a.second + b.second};
        return {{a.first.first, std::max(a.first.second, b.first.first)}, 
            a.second};
    }

    void pull(int ind) {
        sum[ind] = sum[2 * ind] + sum[2 * ind + 1];
        mn[ind] = comb_mn(mn[2 * ind], mn[2 * ind + 1]);
        mx[ind] = comb_mx(mx[2 * ind], mx[2 * ind + 1]);
    }

    void push(int ind, int L, int R) {
        auto chk = [](C& a, C b, C c) {
            if (a == b)
                a = c;
        };
        if (mn_mod[ind] != -INF) {
            if (mn_mod[ind] > mn[ind].first.first) {
                sum[ind] += (mn_mod[ind] - mn[ind].first.first) * mn[ind].second;
                chk(mx[ind].first.first, mn[ind].first.first, mn_mod[ind]);
                chk(mx[ind].first.second, mn[ind].first.first, mn_mod[ind]);
                mn[ind].first.first = mn_mod[ind];
                if (L != R) {
                    for (int i = 0; i < 2; i++) {
                        int pos = 2 * ind + i;
                        mn_mod[pos] = std::max(mn_mod[pos], mn_mod[ind] - mod[pos]);
                        mx_mod[pos] = std::max(mx_mod[pos], mn_mod[pos]);
                    }
                }
            }
            mn_mod[ind] = -INF;
        }
        if (mx_mod[ind] != INF) {
            if (mx_mod[ind] < mx[ind].first.first) {
                sum[ind] += (mx_mod[ind] - mx[ind].first.first) * mx[ind].second;
                chk(mn[ind].first.first, mx[ind].first.first, mx_mod[ind]);
                chk(mn[ind].first.second, mx[ind].first.first, mx_mod[ind]);
                mx[ind].first.first = mx_mod[ind];
                if (L != R) {
                    for (int i = 0; i < 2; i++) {
                        int pos = 2 * ind + i;
                        mx_mod[pos] = std::min(mx_mod[pos], mx_mod[ind] - mod[pos]);
                        mn_mod[pos] = std::min(mn_mod[pos], mx_mod[pos]);
                    }
                }
            }
            mx_mod[ind] = INF;
        }
        if (mod[ind] != 0) {
            sum[ind] += mod[ind] * (R - L + 1);
            auto inc = [&](T& a, C b) {
                if (std::abs(a.first.first) != INF) 
                    a.first.first += b;
                if (std::abs(a.first.second) != INF)
                    a.first.second += b;
            };
            inc(mx[ind], mod[ind]); inc(mn[ind], mod[ind]);
            if (L != R) {
                for (int i = 0; i < 2; i++) {
                    int pos = 2 * ind + i;
                    mod[pos] += mod[ind];
                }
            }
            mod[ind] = 0;
        }
    }

    C qsum(int lo, int hi, int ind = 1, int L = 0, int R = -1) {
        if (R == -1) R += sz;
        push(ind, L, R);
        if (R < lo || hi < L)
            return 0;
        if (lo <= L && R <= hi)     
            return sum[ind];
        int M = (L + R) / 2;
        return qsum(lo, hi, 2 * ind, L, M) + qsum(lo, hi, 2 * ind + 1, M + 1, R);
    }

    C qmax(int lo, int hi, int ind = 1, int L = 0, int R = -1) {
        if (R == -1) R += sz;
        push(ind, L, R);
        if (R < lo || hi < L)
            return -INF;
        if (lo <= L && R <= hi)     
            return mx[ind].first.first;
        int M = (L + R) / 2;
        return std::max(qmax(lo, hi, 2 * ind, L, M), qmax(lo, hi, 2 * ind + 1, M + 1, R));
    }

    C qmin(int lo, int hi, int ind = 1, int L = 0, int R = -1) {
        if (R == -1) R += sz;
        push(ind, L, R);
        if (R < lo || hi < L)
            return INF;
        if (lo <= L && R <= hi)     
            return mn[ind].first.first;
        int M = (L + R) / 2;
        return std::min(qmin(lo, hi, 2 * ind, L, M), qmin(lo, hi, 2 * ind + 1, M + 1, R));
    }
    
    void upd(int t, int lo, int hi, C b, int ind = 1, int L = 0, int R = -1) {
        if (R == -1) R += sz;
        push(ind, L, R);
        if (R < lo || hi < L) 
            return;
        if (t == 0) 
            if (b >= mx[ind].first.first)
                return;
        else if (t == 1)
            if (b <= mn[ind].first.first)
                return;
        if (lo <= L && R <= hi) {
            if (t == 0) {
                if (b  > mx[ind].first.second) {
                    mx_mod[ind] = b;
                    push(ind, L, R);
                    return;
                }
            } else if (t == 1) {
                if (b < mn[ind].first.second) {
                    mn_mod[ind] = b;
                    push(ind, L, R);
                    return;
                }
            } else if (t == 2) {
                mod[ind] = b;
                push(ind, L, R);
                return;
            } else assert(false);
        }
        assert(L != R);
        int M = (L + R) / 2;
        upd(t, lo, hi, b, 2 * ind, L, M); upd(t, lo, hi, b, 2 * ind + 1, M + 1, R);
        pull(ind);
    }
};

const ll INF = 1e18;
struct MaxSeg {
    vl lz;
    vector<pair<ll, int>> st;
    int sz;

    void pull(int i) {
        st[i] = max(st[2 * i], st[2 * i + 1]);
    }

    void init(int n) {
        sz = 1;
        while (sz < n) sz <<= 1;
        lz.assign(2 * sz, 0);
        st.resize(2 * sz);
        f0r(i, sz) st[i + sz] = mp(0, i);
        for (int i = sz - 1; i >= 1; i--) pull(i);
    }

    void push(int i, int l, int r) {
        st[i].f += lz[i];
        if (l != r) { 
            lz[2 * i] += lz[i];
            lz[2 * i + 1] += lz[i];
        }
        lz[i] = 0;
    }

    void upd(int lo, int hi, ll inc, int i = 1, int l = 0, int r = -1) {
        if (r == -1) r += sz;
        push(i, l, r);
        if (hi < l || r < lo) return;
        if (lo <= l && r <= hi) {
            lz[i] = inc;
            push(i, l, r);
            return;
        }
        int m = (l + r) >> 1;
        upd(lo, hi, inc, 2 * i, l, m);
        upd(lo, hi, inc, 2 * i + 1, m + 1, r);
        pull(i);
    }

    pair<ll, int> query(int lo, int hi, int i = 1, int l = 0, int r = -1) {
        if (r == -1) r += sz;
        push(i, l, r);
        if (hi < l || r < lo) return mp(-2 * INF, -1);
        if (lo <= l && r <= hi) return st[i];
        int m = (l + r) >> 1;
        return max(query(lo, hi, 2 * i, l, m), query(lo, hi, 2 * i + 1, m + 1, r));
    }
};

vpl queries[N]; 
int ans[N];


int n, m, q;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> m >> q;
    vector<array<ll, 5>> que(q);
    SumSeg sseg; sseg.init(n);
    SegmentTreeBeats<ll> seg; seg.init(n);
    f0r(t, q) { 
        int ty; cin >> ty;
        auto& qq = que[t];
        ty--;
        qq[0] = ty;
        if (ty == 0) {
            int l, r, c; ll k; cin >> l >> r >> c >> k;
            l--, r--;
            qq[1] = l;
            qq[2] = r;
            qq[3] = c;
            qq[4] = k;
            sseg.upd(l, r, k);
            seg.upd(2, l, r, k);
        } else if (ty == 1) { 
            int l, r; ll k; cin >> l >> r >> k;
            l--, r--;
            qq[1] = l;
            qq[2] = r;
            qq[3] = k;
            seg.upd(2, l, r, -k);
            seg.upd(1, l, r, 0);
        } else {
            int a, b; cin >> a >> b;
            a--;
            qq[1] = a;
            ll tt = sseg.query(a, a);
            ll c = seg.qsum(a, a);
            ll amt;
            if (b <= c) amt = tt - (c - b);
            else amt = INF;
            qq[2] = amt;
            queries[a].eb(amt, t);
        }
    }
    f0r(i, n) sort(all(queries[i])), reverse(all(queries[i]));
    MaxSeg mseg; mseg.init(n);
    f0r(i, n) {
        if (queries[i].empty()) {
            mseg.upd(i, i, -2 * INF);
            continue;
        }
        mseg.upd(i, i, -queries[i].back().f);
    }
    f0r(t, q) {
        auto& qq = que[t];
        int ty = qq[0];
        if (ty == 0) { 
            int l = qq[1];
            int r = qq[2];
            int c = qq[3];
            ll k = qq[4];
            mseg.upd(l, r, k);
            auto res = mseg.query(0, n - 1);
            while (res.f >= 0) {
                int loc = res.s;
                auto done = queries[loc].back();
                ans[done.s] = c;
                mseg.upd(loc, loc, done.f);
                queries[loc].pop_back();
                if (!queries[loc].empty()) {
                    auto nxt = queries[loc].back();
                    mseg.upd(loc, loc, -nxt.f);
                } else {
                    mseg.upd(loc, loc, -INF);
                }
                res = mseg.query(0, n - 1);
            }
        } else if (ty == 1) {
            continue;
        } else {
            continue;
        }
    }
    f0r(i, q) {
        if (que[i][0] != 2) continue;
        cout << ans[i] << '\n';
    }

    return 0;
}

/** 
 * So basically, we can reindex the person, so we want to find the first point in time you have >= x customers at shop i 
 * 
 */

Compilation message

foodcourt.cpp: In member function 'void SegmentTreeBeats<C>::upd(int, int, int, C, int, int, int)':
foodcourt.cpp:235:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  235 |         if (t == 0)
      |            ^

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12620 KB Output is correct
2 Correct 14 ms 12620 KB Output is correct
3 Correct 12 ms 12620 KB Output is correct
4 Correct 16 ms 12620 KB Output is correct
5 Correct 9 ms 12176 KB Output is correct
6 Correct 9 ms 12108 KB Output is correct
7 Correct 14 ms 12620 KB Output is correct
8 Correct 14 ms 12552 KB Output is correct
9 Correct 16 ms 12536 KB Output is correct
10 Correct 14 ms 12620 KB Output is correct
11 Correct 15 ms 12632 KB Output is correct
12 Correct 15 ms 12652 KB Output is correct
13 Correct 21 ms 12632 KB Output is correct
14 Correct 12 ms 12584 KB Output is correct
15 Correct 12 ms 12620 KB Output is correct
16 Correct 13 ms 12572 KB Output is correct
17 Correct 14 ms 12620 KB Output is correct
18 Correct 15 ms 12620 KB Output is correct
19 Correct 14 ms 12624 KB Output is correct
20 Correct 13 ms 12620 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12620 KB Output is correct
2 Correct 14 ms 12620 KB Output is correct
3 Correct 12 ms 12620 KB Output is correct
4 Correct 16 ms 12620 KB Output is correct
5 Correct 9 ms 12176 KB Output is correct
6 Correct 9 ms 12108 KB Output is correct
7 Correct 14 ms 12620 KB Output is correct
8 Correct 14 ms 12552 KB Output is correct
9 Correct 16 ms 12536 KB Output is correct
10 Correct 14 ms 12620 KB Output is correct
11 Correct 15 ms 12632 KB Output is correct
12 Correct 15 ms 12652 KB Output is correct
13 Correct 21 ms 12632 KB Output is correct
14 Correct 12 ms 12584 KB Output is correct
15 Correct 12 ms 12620 KB Output is correct
16 Correct 13 ms 12572 KB Output is correct
17 Correct 14 ms 12620 KB Output is correct
18 Correct 15 ms 12620 KB Output is correct
19 Correct 14 ms 12624 KB Output is correct
20 Correct 13 ms 12620 KB Output is correct
21 Incorrect 11 ms 12620 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 388 ms 30772 KB Output is correct
2 Correct 357 ms 30568 KB Output is correct
3 Correct 335 ms 30720 KB Output is correct
4 Correct 353 ms 30660 KB Output is correct
5 Correct 374 ms 30564 KB Output is correct
6 Correct 379 ms 30608 KB Output is correct
7 Correct 32 ms 15176 KB Output is correct
8 Correct 36 ms 15120 KB Output is correct
9 Correct 345 ms 30656 KB Output is correct
10 Correct 338 ms 30676 KB Output is correct
11 Correct 347 ms 30604 KB Output is correct
12 Correct 367 ms 30620 KB Output is correct
13 Correct 284 ms 30560 KB Output is correct
14 Correct 328 ms 31036 KB Output is correct
15 Correct 311 ms 30544 KB Output is correct
16 Correct 356 ms 30716 KB Output is correct

Subtask #4
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 248 ms 158344 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12620 KB Output is correct
2 Correct 14 ms 12620 KB Output is correct
3 Correct 12 ms 12620 KB Output is correct
4 Correct 16 ms 12620 KB Output is correct
5 Correct 9 ms 12176 KB Output is correct
6 Correct 9 ms 12108 KB Output is correct
7 Correct 14 ms 12620 KB Output is correct
8 Correct 14 ms 12552 KB Output is correct
9 Correct 16 ms 12536 KB Output is correct
10 Correct 14 ms 12620 KB Output is correct
11 Correct 15 ms 12632 KB Output is correct
12 Correct 15 ms 12652 KB Output is correct
13 Correct 21 ms 12632 KB Output is correct
14 Correct 12 ms 12584 KB Output is correct
15 Correct 12 ms 12620 KB Output is correct
16 Correct 13 ms 12572 KB Output is correct
17 Correct 14 ms 12620 KB Output is correct
18 Correct 15 ms 12620 KB Output is correct
19 Correct 14 ms 12624 KB Output is correct
20 Correct 13 ms 12620 KB Output is correct
21 Correct 388 ms 30772 KB Output is correct
22 Correct 357 ms 30568 KB Output is correct
23 Correct 335 ms 30720 KB Output is correct
24 Correct 353 ms 30660 KB Output is correct
25 Correct 374 ms 30564 KB Output is correct
26 Correct 379 ms 30608 KB Output is correct
27 Correct 32 ms 15176 KB Output is correct
28 Correct 36 ms 15120 KB Output is correct
29 Correct 345 ms 30656 KB Output is correct
30 Correct 338 ms 30676 KB Output is correct
31 Correct 347 ms 30604 KB Output is correct
32 Correct 367 ms 30620 KB Output is correct
33 Correct 284 ms 30560 KB Output is correct
34 Correct 328 ms 31036 KB Output is correct
35 Correct 311 ms 30544 KB Output is correct
36 Correct 356 ms 30716 KB Output is correct
37 Correct 342 ms 30684 KB Output is correct
38 Correct 296 ms 30168 KB Output is correct
39 Correct 29 ms 14712 KB Output is correct
40 Correct 34 ms 15044 KB Output is correct
41 Correct 386 ms 30844 KB Output is correct
42 Correct 372 ms 30772 KB Output is correct
43 Correct 417 ms 30900 KB Output is correct
44 Correct 386 ms 30768 KB Output is correct
45 Correct 441 ms 30848 KB Output is correct
46 Correct 419 ms 30788 KB Output is correct
47 Correct 203 ms 31012 KB Output is correct
48 Correct 306 ms 30940 KB Output is correct
49 Correct 370 ms 29784 KB Output is correct
50 Correct 416 ms 30208 KB Output is correct
51 Correct 486 ms 30648 KB Output is correct
52 Correct 475 ms 30676 KB Output is correct
53 Correct 284 ms 29820 KB Output is correct
54 Correct 351 ms 30552 KB Output is correct

Subtask #6
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 93 ms 32200 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12620 KB Output is correct
2 Correct 14 ms 12620 KB Output is correct
3 Correct 12 ms 12620 KB Output is correct
4 Correct 16 ms 12620 KB Output is correct
5 Correct 9 ms 12176 KB Output is correct
6 Correct 9 ms 12108 KB Output is correct
7 Correct 14 ms 12620 KB Output is correct
8 Correct 14 ms 12552 KB Output is correct
9 Correct 16 ms 12536 KB Output is correct
10 Correct 14 ms 12620 KB Output is correct
11 Correct 15 ms 12632 KB Output is correct
12 Correct 15 ms 12652 KB Output is correct
13 Correct 21 ms 12632 KB Output is correct
14 Correct 12 ms 12584 KB Output is correct
15 Correct 12 ms 12620 KB Output is correct
16 Correct 13 ms 12572 KB Output is correct
17 Correct 14 ms 12620 KB Output is correct
18 Correct 15 ms 12620 KB Output is correct
19 Correct 14 ms 12624 KB Output is correct
20 Correct 13 ms 12620 KB Output is correct
21 Incorrect 11 ms 12620 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #8
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12620 KB Output is correct
2 Correct 14 ms 12620 KB Output is correct
3 Correct 12 ms 12620 KB Output is correct
4 Correct 16 ms 12620 KB Output is correct
5 Correct 9 ms 12176 KB Output is correct
6 Correct 9 ms 12108 KB Output is correct
7 Correct 14 ms 12620 KB Output is correct
8 Correct 14 ms 12552 KB Output is correct
9 Correct 16 ms 12536 KB Output is correct
10 Correct 14 ms 12620 KB Output is correct
11 Correct 15 ms 12632 KB Output is correct
12 Correct 15 ms 12652 KB Output is correct
13 Correct 21 ms 12632 KB Output is correct
14 Correct 12 ms 12584 KB Output is correct
15 Correct 12 ms 12620 KB Output is correct
16 Correct 13 ms 12572 KB Output is correct
17 Correct 14 ms 12620 KB Output is correct
18 Correct 15 ms 12620 KB Output is correct
19 Correct 14 ms 12624 KB Output is correct
20 Correct 13 ms 12620 KB Output is correct
21 Incorrect 11 ms 12620 KB Output isn't correct
22 Halted 0 ms 0 KB -