oj.uz

Submission #847987

# Submission time Handle Problem Language Result Execution time Memory
847987 2023-09-11T00:25:25 Z resting Modern Machine (JOI23_ho_t5) C++17
15 / 100
 3000 ms 1048576 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;
    vector<pair<int, int>> us;
    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) { us.push_back({ i, 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:77:57: 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]
   77 |     void u(int i, int v) { us.push_back({ i, v });if (i < a.size()) a[i] += v; for (i++; i < b.size(); i += i & -i) b[i] += v; }
      |                                                       ~~^~~~~~~~~~
Main.cpp:77:92: 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]
   77 |     void u(int i, int v) { us.push_back({ i, 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:135:13: warning: unused variable 'k' [-Wunused-variable]
  135 |         int k = j / magic;
      |             ^
Main.cpp: In lambda function:
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 (tmp1 + v1 >= ls.size()) return false;
      |                 ~~~~~~~~~~^~~~~~~~~~~~
Main.cpp:223:27: 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]
  223 |             if (tmp2 + v2 >= rs.size()) return false;
      |                 ~~~~~~~~~~^~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 564888 KB Output is correct
2 Correct 76 ms 564900 KB Output is correct
3 Correct 75 ms 565008 KB Output is correct
4 Correct 79 ms 565056 KB Output is correct
5 Correct 77 ms 564820 KB Output is correct
6 Correct 74 ms 564972 KB Output is correct
7 Correct 75 ms 565072 KB Output is correct
8 Correct 76 ms 565072 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 90 ms 564888 KB Output is correct
2 Correct 76 ms 564900 KB Output is correct
3 Correct 75 ms 565008 KB Output is correct
4 Correct 79 ms 565056 KB Output is correct
5 Correct 77 ms 564820 KB Output is correct
6 Correct 74 ms 564972 KB Output is correct
7 Correct 75 ms 565072 KB Output is correct
8 Correct 76 ms 565072 KB Output is correct
9 Correct 75 ms 564816 KB Output is correct
10 Correct 92 ms 574660 KB Output is correct
11 Correct 93 ms 574852 KB Output is correct
12 Correct 94 ms 575664 KB Output is correct
13 Correct 90 ms 574408 KB Output is correct
14 Correct 90 ms 575676 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 564888 KB Output is correct
2 Correct 76 ms 564900 KB Output is correct
3 Correct 75 ms 565008 KB Output is correct
4 Correct 79 ms 565056 KB Output is correct
5 Correct 77 ms 564820 KB Output is correct
6 Correct 74 ms 564972 KB Output is correct
7 Correct 75 ms 565072 KB Output is correct
8 Correct 76 ms 565072 KB Output is correct
9 Correct 75 ms 564816 KB Output is correct
10 Correct 92 ms 574660 KB Output is correct
11 Correct 93 ms 574852 KB Output is correct
12 Correct 94 ms 575664 KB Output is correct
13 Correct 90 ms 574408 KB Output is correct
14 Correct 90 ms 575676 KB Output is correct
15 Correct 76 ms 564920 KB Output is correct
16 Correct 77 ms 564904 KB Output is correct
17 Correct 75 ms 564816 KB Output is correct
18 Runtime error 519 ms 1048576 KB Execution killed with signal 9
19 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 564816 KB Output is correct
2 Execution timed out 3045 ms 577468 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 564816 KB Output is correct
2 Execution timed out 3045 ms 577468 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 564816 KB Output is correct
2 Execution timed out 3045 ms 577468 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 564888 KB Output is correct
2 Correct 76 ms 564900 KB Output is correct
3 Correct 75 ms 565008 KB Output is correct
4 Correct 79 ms 565056 KB Output is correct
5 Correct 77 ms 564820 KB Output is correct
6 Correct 74 ms 564972 KB Output is correct
7 Correct 75 ms 565072 KB Output is correct
8 Correct 76 ms 565072 KB Output is correct
9 Correct 75 ms 564816 KB Output is correct
10 Correct 92 ms 574660 KB Output is correct
11 Correct 93 ms 574852 KB Output is correct
12 Correct 94 ms 575664 KB Output is correct
13 Correct 90 ms 574408 KB Output is correct
14 Correct 90 ms 575676 KB Output is correct
15 Correct 76 ms 564920 KB Output is correct
16 Correct 77 ms 564904 KB Output is correct
17 Correct 75 ms 564816 KB Output is correct
18 Runtime error 519 ms 1048576 KB Execution killed with signal 9
19 Halted 0 ms 0 KB -