oj.uz

Submission #847980

# Submission time Handle Problem Language Result Execution time Memory
847980 2023-09-11T00:16:16 Z resting Modern Machine (JOI23_ho_t5) C++17
25 / 100
 3000 ms 578280 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
const int mx = 1.2e5 + 5;

const int magic = 350;
//const int magic = 3;

namespace rmq {
    struct segtree {
        segtree* lc = 0, * rc = 0;
        int l, r;
        int v = numeric_limits<int>::max();
        segtree* getmem();
        segtree() : segtree(-1, -1) {};
        segtree(int l, int r) : l(l), r(r) {
            if (l == r)return;
            int m = (l + r) / 2;
            lc = getmem(); *lc = segtree(l, m);
            rc = getmem(); *rc = segtree(m + 1, r);
        };
        segtree* upd(int qi, int qv) {
            segtree* tr = getmem(); *tr = *this;
            if (qi < l || qi > r) return tr;
            if (l == r) { tr->v = qv; return tr; }
            tr->lc = lc->upd(qi, qv); tr->rc = rc->upd(qi, qv);
            tr->v = min(tr->lc->v, tr->rc->v);
            return tr;
        }
        int q(int ql, int qr) {
            if (ql > qr)return numeric_limits<int>::max();
            if (ql > r || qr < l) return numeric_limits<int>::max();
            if (ql <= l && qr >= r) return v;
            return min(lc->q(ql, qr), rc->q(ql, qr));
        }
    }mem[mx * 40]; int memsz = 0;// surely enogh?
    segtree* segtree::getmem() { return &mem[memsz++]; }
}

namespace rsq {
    struct segtree {
        segtree* lc = 0, * rc = 0;
        int l, r;
        int v = 0;
        segtree* getmem();
        segtree() : segtree(-1, -1) {};
        segtree(int l, int r) : l(l), r(r) {
            if (l == r)return;
            int m = (l + r) / 2;
            lc = getmem(); *lc = segtree(l, m);
            rc = getmem(); *rc = segtree(m + 1, r);
        };
        segtree* upd(int qi, int qv) {
            segtree* tr = getmem(); *tr = *this;
            if (qi < l || qi > r) return tr;
            if (l == r) { tr->v += qv; return tr; }
            tr->lc = lc->upd(qi, qv); tr->rc = rc->upd(qi, qv);
            tr->v = tr->lc->v + tr->rc->v;
            return tr;
        }
        int q(int ql, int qr) {
            if (ql > qr) return 0;
            if (ql > r || qr < l) return 0;
            if (ql <= l && qr >= r) return v;
            return lc->q(ql, qr) + rc->q(ql, qr);
        }
    }mem[mx * 80]; int memsz = 0;// surely enogh?
    segtree* segtree::getmem() { return &mem[memsz++]; }
}

struct bit {
    vector<int> b, a;
    bit(int n) : b(n + 1, 0), a(n + 1, 0) {};
    int q(int i) { int v = 0; for (i++; i > 0; i -= i & -i) v += b[i]; return v; }
    void u(int i, int v) { if (i < a.size()) a[i] += v; for (i++; i < b.size(); i += i & -i) b[i] += v; }
    void u(int l, int r, int v) { if (l > r) return; u(l, v);  u(r + 1, -v); }
};

int holy[mx / magic][mx];


int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    int n, m; cin >> n >> m;
    string c; cin >> c;
    vector<int> a(m); for (auto& x : a) { cin >> x;  x--; }
    vector<vector<int>> a2(n + 1);
    for (int i = 0; i < m; i++) a2[a[i]].push_back(i);
    vector<int> ls, rs;
    ls.push_back(-1); rs.push_back(n);
    for (int i = 0; i < n; i++) if (c[i] == 'B') ls.push_back(i);
    for (int i = n - 1; i >= 0; i--) if (c[i] == 'R') rs.push_back(i);

    vector<int> pre(n, 0);
    for (int i = 0; i < n; i++) {
        if (i) pre[i] = pre[i - 1];
        pre[i] += c[i] == 'R';
    }

    auto sm = [&](int l, int r) {
        if (l > r) return 0LL;
        if (l > n) l = n;
        if (r > n - 1) r = n - 1;
        if (r < 0) return 0LL;
        if (l <= 0) return pre[r];
        return pre[r] - pre[l - 1];
    }; //very necessary yk

    rmq::segtree* tmp = new rmq::segtree(0, n - 1);
    vector<rmq::segtree*> ac(m, 0);
    for (int i = m - 1; i >= 0; i--) {
        ac[i] = tmp = tmp->upd(a[i], i);
    }

    rsq::segtree* tmp2 = new rsq::segtree(0, m - 1);
    vector<rsq::segtree*> ac2(n + 1, 0);
    for (int i = 0; i <= n; i++) {
        for (auto& x : a2[i]) tmp2 = tmp2->upd(x, i + 1);
        ac2[i] = tmp2;
    }

    rsq::segtree* tmp3 = new rsq::segtree(0, m - 1);
    vector<rsq::segtree*> ac3(n + 1, 0);
    for (int i = n; i >= 0; i--) {
        for (auto& x : a2[i]) {
            tmp3 = tmp3->upd(x, n - 1 - i);
        }
        ac3[i] = tmp3;
    }

    bit die(n + 1);
    for (int j = 0; j + magic <= m; j += magic) {
        int k = j / magic;
        die.a.assign(n + 2, 0);
        die.b.assign(n + 2, 0);
        for (int i = 0; i <= n; i++) die.u(i, i, i);
        for (int x = j; x < j + magic; x++) {
            int cur = 0;
            while (cur <= n) {
                int i = die.q(cur) / (n + 1);
                int l = cur - 1, r = n + 1;
                while (r - l > 1) {
                    int m = l + (r - l) / 2;
                    if (die.q(m) / (n + 1) == i) l = m;
                    else r = m;
                }
                //[cur, l] is bound
                int l2 = cur - 1, r2 = l + 1;
                while (r2 - l2 > 1) {
                    int m = l2 + (r2 - l2) / 2;
                    if (die.q(m) % (n + 1) <= a[x]) l2 = m;
                    else r2 = m;
                }
                //r is bound
                die.u(cur, l2, 1);
                cur = l + 1;
            }
            die.u(0, n, a[x] + 1);
        }
        // for (int i = 0; i <= n; i++) {
        //     if (i) die.a[i] += die.a[i - 1];
        //     holy[k][i] = die.a[i] % (n + 1);
        // }
    }

    int q; cin >> q;

    while (q--) {
        int l, r; cin >> l >> r; l--;r--;
        //solve
        int li = -1, ri = n;
        int cur = l;
        auto qcnt = [&](int l, int r) {
            int res = 0;
            if (l > r) return 0LL;
            if (r <= li) return r - l + 1;
            if (l >= ri) return 0LL;
            if (l <= li) {
                res += li - l + 1;
                l = li + 1;
            }
            if (r >= ri) r = ri - 1;
            return res + sm(l, r);
            //LMAO
        };

        auto qcnt2 = [&](int l, int r) {
            if (l > r) return 0LL;
            return (r - l + 1) - qcnt(l, r);};

        auto thing = [&](int t) { // should work for everything?
            int a = qcnt(0, t - 1) * 2 + 1;
            int b = qcnt2(t + 1, n - 1) * 2;
            if (a > b) {
                int ll = 0 - 1, rr = t + 1;
                while (rr - ll > 1) {
                    int m = ll + (rr - ll) / 2;
                    if (qcnt(m, t - 1) * 2 + 1 >= b)ll = m;
                    else rr = m;
                }
                ri = min(ri, ll);
                if (li >= ri) li = ri - 1;
            } else {
                int ll = t, rr = n;
                while (rr - ll > 1) {
                    int m = ll + (rr - ll) / 2;
                    if (qcnt2(t + 1, m) * 2 >= a)rr = m;
                    else ll = m;
                }
                li = rr;
                if (ri <= li) ri = li + 1;
            }
        };

        auto test = [&](int t) -> bool {
            int v1 = li == -1 ? 0 : ac2[li]->q(cur, t);
            int v2 = ri == n ? 0 : ac3[ri]->q(cur, t);
            int tmp1 = prev(upper_bound(ls.begin(), ls.end(), li)) - ls.begin();
            int tmp2 = prev(upper_bound(rs.begin(), rs.end(), ri, greater<int>())) - rs.begin();
            if (tmp1 + v1 >= ls.size()) return false;
            if (tmp2 + v2 >= rs.size()) return false;
            int nl = v1 ? ls[tmp1 + v1] : li;
            int nr = v2 ? rs[tmp2 + v2] : ri;
            if (nl >= nr) return false;
            li = nl; ri = nr;
            cur = t + 1;
            return true;
        };

        while (cur <= r) {
            int t = min(ac[cur]->q(li + 1, ri - 1), r + 1);
            //do the thing?
            if (!test(t - 1)) break;
            if (cur <= r)thing(a[cur++]);
        }
        if (cur <= r) {
            int t = min(ac[cur]->q(li + 1, ri - 1), r + 1);
            for (int i = 18; i >= 0; i--) {
                if (cur + (1 << i) <= t - 1) test(cur + (1 << i));
            }
        }

        for (int i = 0; i < 5; i++) if (cur <= r) thing(a[cur++]);
        while (cur <= r) {
            if (0 && cur % magic == 0 && cur + magic <= r + 1) {
                ri = holy[cur / magic][ri];
                li = ri - 1;
                cur += magic;
            } else {
                if (a[cur] >= ri) ri++;
                ri += a[cur] + 1;
                while (ri >= n + 1) ri -= (n + 1);
                li = ri - 1;
                cur++;
            }
        }
        cout << qcnt(0, n - 1) << endl;
    }
}

Compilation message

Main.cpp: In member function 'void bit::u(long long int, long long int)':
Main.cpp:76:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |     void u(int i, int v) { if (i < a.size()) a[i] += v; for (i++; i < b.size(); i += i & -i) b[i] += v; }
      |                                ~~^~~~~~~~~~
Main.cpp:76:69: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |     void u(int i, int v) { if (i < a.size()) a[i] += v; for (i++; i < b.size(); i += i & -i) b[i] += v; }
      |                                                                   ~~^~~~~~~~~~
Main.cpp: In function 'int32_t main()':
Main.cpp:134:13: warning: unused variable 'k' [-Wunused-variable]
  134 |         int k = j / magic;
      |             ^
Main.cpp: In lambda function:
Main.cpp:221:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  221 |             if (tmp1 + v1 >= ls.size()) return false;
      |                 ~~~~~~~~~~^~~~~~~~~~~~
Main.cpp:222:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  222 |             if (tmp2 + v2 >= rs.size()) return false;
      |                 ~~~~~~~~~~^~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564816 KB Output is correct
2 Correct 78 ms 564816 KB Output is correct
3 Correct 75 ms 564816 KB Output is correct
4 Correct 76 ms 564900 KB Output is correct
5 Correct 76 ms 564816 KB Output is correct
6 Correct 76 ms 564816 KB Output is correct
7 Correct 78 ms 565072 KB Output is correct
8 Correct 77 ms 565060 KB Output is correct
9 Correct 75 ms 564816 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564816 KB Output is correct
2 Correct 78 ms 564816 KB Output is correct
3 Correct 75 ms 564816 KB Output is correct
4 Correct 76 ms 564900 KB Output is correct
5 Correct 76 ms 564816 KB Output is correct
6 Correct 76 ms 564816 KB Output is correct
7 Correct 78 ms 565072 KB Output is correct
8 Correct 77 ms 565060 KB Output is correct
9 Correct 75 ms 564816 KB Output is correct
10 Correct 86 ms 565584 KB Output is correct
11 Correct 86 ms 565672 KB Output is correct
12 Correct 90 ms 565844 KB Output is correct
13 Correct 83 ms 565584 KB Output is correct
14 Correct 87 ms 565584 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564816 KB Output is correct
2 Correct 78 ms 564816 KB Output is correct
3 Correct 75 ms 564816 KB Output is correct
4 Correct 76 ms 564900 KB Output is correct
5 Correct 76 ms 564816 KB Output is correct
6 Correct 76 ms 564816 KB Output is correct
7 Correct 78 ms 565072 KB Output is correct
8 Correct 77 ms 565060 KB Output is correct
9 Correct 75 ms 564816 KB Output is correct
10 Correct 86 ms 565584 KB Output is correct
11 Correct 86 ms 565672 KB Output is correct
12 Correct 90 ms 565844 KB Output is correct
13 Correct 83 ms 565584 KB Output is correct
14 Correct 87 ms 565584 KB Output is correct
15 Correct 75 ms 564816 KB Output is correct
16 Correct 76 ms 564816 KB Output is correct
17 Correct 76 ms 565296 KB Output is correct
18 Correct 875 ms 576500 KB Output is correct
19 Correct 926 ms 577164 KB Output is correct
20 Correct 1010 ms 577540 KB Output is correct
21 Correct 1070 ms 578280 KB Output is correct
22 Correct 945 ms 576976 KB Output is correct
23 Correct 918 ms 577160 KB Output is correct
24 Correct 866 ms 576928 KB Output is correct
25 Correct 856 ms 576928 KB Output is correct

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564868 KB Output is correct
2 Execution timed out 3045 ms 568568 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564868 KB Output is correct
2 Execution timed out 3045 ms 568568 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564868 KB Output is correct
2 Execution timed out 3045 ms 568568 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564816 KB Output is correct
2 Correct 78 ms 564816 KB Output is correct
3 Correct 75 ms 564816 KB Output is correct
4 Correct 76 ms 564900 KB Output is correct
5 Correct 76 ms 564816 KB Output is correct
6 Correct 76 ms 564816 KB Output is correct
7 Correct 78 ms 565072 KB Output is correct
8 Correct 77 ms 565060 KB Output is correct
9 Correct 75 ms 564816 KB Output is correct
10 Correct 86 ms 565584 KB Output is correct
11 Correct 86 ms 565672 KB Output is correct
12 Correct 90 ms 565844 KB Output is correct
13 Correct 83 ms 565584 KB Output is correct
14 Correct 87 ms 565584 KB Output is correct
15 Correct 75 ms 564816 KB Output is correct
16 Correct 76 ms 564816 KB Output is correct
17 Correct 76 ms 565296 KB Output is correct
18 Correct 875 ms 576500 KB Output is correct
19 Correct 926 ms 577164 KB Output is correct
20 Correct 1010 ms 577540 KB Output is correct
21 Correct 1070 ms 578280 KB Output is correct
22 Correct 945 ms 576976 KB Output is correct
23 Correct 918 ms 577160 KB Output is correct
24 Correct 866 ms 576928 KB Output is correct
25 Correct 856 ms 576928 KB Output is correct
26 Correct 76 ms 564868 KB Output is correct
27 Execution timed out 3045 ms 568568 KB Time limit exceeded
28 Halted 0 ms 0 KB -