oj.uz

Submission #881740

# Submission time Handle Problem Language Result Execution time Memory
881740 2023-12-01T20:12:02 Z MilosMilutinovic Segments (IZhO18_segments) C++14
7 / 100
 5000 ms 65536 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 2e5;
const int M = 20 * N;

int root[N][2], ls[M], rs[M], cnt[M], tsz;

void Modify(int& x, int y, int l, int r, int p) {
  x = ++tsz;
  ls[x] = ls[y];
  rs[x] = rs[y];
  cnt[x] = cnt[y] + 1;
  if (l == r) {
    return;
  }
  int mid = l + r >> 1;
  if (p <= mid) {
    Modify(ls[x], ls[y], l, mid, p);
  } else {
    Modify(rs[x], rs[y], mid + 1, r, p);
  }
}

int Query(int x, int l, int r, int ll, int rr) {
  if (ll <= l && r <= rr) {
    return cnt[x];
  }
  int mid = l + r >> 1;
  if (rr <= mid) {
    return Query(ls[x], l, mid, ll, rr);
  } else if (ll > mid) {
    return Query(rs[x], mid + 1, r, ll, rr);
  } else {
    return Query(ls[x], l, mid, ll, rr) + Query(rs[x], mid + 1, r, ll, rr);
  }
}

void clear_seg() {
  while (tsz > 0) {
    ls[tsz] = 0;
    rs[tsz] = 0;
    cnt[tsz] = 0;
    tsz--;
  }
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, t;
  cin >> n >> t;
  vector<int> op(n), a(n), b(n), k(n);
  for (int i = 0; i < n; i++) {
    cin >> op[i];
    if (op[i] == 1) {
      cin >> a[i] >> b[i];
    }
    if (op[i] == 2) {
      cin >> a[i];
      --a[i];
    }
    if (op[i] == 3) {
      cin >> a[i] >> b[i] >> k[i];
    }
  }
  vector<int> vec;
  vector<int> idx(n);
  vector<int> to(n, n);
  for (int i = 0; i < n; i++) {
    if (op[i] == 1) {
      vec.push_back(i);
    }
    if (op[i] == 2) {
      idx[i] = vec[a[i]];
      to[idx[i]] = i;
    }
  }
  const int BLOCK = 600;
  int res = 0;
  for (int L = 0; L < n; L += BLOCK) {
    int R = min(L + BLOCK, n);
    vector<int> xs;
    for (int i = 0; i < L; i++) {
      if (op[i] == 1) {
        if (to[i] < L || to[i] >= R) {
          xs.push_back(a[i]);
          xs.push_back(b[i]);
          xs.push_back(b[i] - a[i] + 1);
        }
      }
    }
    sort(xs.begin(), xs.end());
    xs.erase(unique(xs.begin(), xs.end()), xs.end());
    int sz = (int) xs.size();
    vector<vector<pair<int, int>>> qs(sz);
    for (int i = 0; i < L; i++) {
      if (op[i] == 1) {
        if (to[i] >= R) {
          int ll = (int) (lower_bound(xs.begin(), xs.end(), a[i]) - xs.begin());
          int rr = (int) (lower_bound(xs.begin(), xs.end(), b[i]) - xs.begin());
          int len = (int) (lower_bound(xs.begin(), xs.end(), b[i] - a[i] + 1) - xs.begin());
          qs[rr].push_back({ll, len});
        }
      }
    }
    clear_seg();
    for (int i = sz - 1; i >= 0; i--) {
      if (i + 1 < sz) {
        root[i][0] = root[i + 1][0];
        root[i][1] = root[i + 1][1];
      } else {
        root[i][0] = 0;
        root[i][1] = 0;
      }
      for (auto &p : qs[i]) {
        Modify(root[i][0], root[i][0], 0, sz - 1, p.first);
        Modify(root[i][1], root[i][1], 0, sz - 1, p.second);
      }
    }
    vector<int> cur;
    for (int i = 0; i < R; i++) {
      if (op[i] == 1 && (i >= L || (to[i] >= L && to[i] < R))) {
        cur.push_back(i);
      }
    }
    for (int i = L; i < R; i++) {
      if (op[i] == 1) {
        a[i] = (a[i] ^ (t * res));
        b[i] = (b[i] ^ (t * res));
        if (a[i] > b[i]) {
          swap(a[i], b[i]);
        }
      }
      if (op[i] == 3) {
        a[i] = (a[i] ^ (t * res));
        b[i] = (b[i] ^ (t * res));
        if (a[i] > b[i]) {
          swap(a[i], b[i]);
        }
        res = 0;
        if (b[i] - a[i] + 1 < k[i]) {
          cout << 0 << '\n';
          continue;
        }
        for (int j : cur) {
          if (j < i && op[j] == 1 && to[j] >= i) {
            int ll = max(a[i], a[j]);
            int rr = min(b[i], b[j]);
            if (rr - ll + 1 >= k[i]) {
              res += 1;
            }
          }
        }
        int idx = -1;
        {
          int low = 0, high = sz - 1;
          while (low <= high) {
            int mid = low + high >> 1;
            if (xs[mid] >= k[i]) {
              idx = mid;
              high = mid - 1;
            } else {
              low = mid + 1;
            }
          }
        }
        {
          int low = 0, high = sz - 1, pos = -1;
          while (low <= high) {
            int mid = low + high >> 1;
            if (xs[mid] >= a[i] + k[i] - 1) {
              pos = mid;
              high = mid - 1;
            } else {
              low = mid + 1;
            }
          }
          if (pos != -1 && idx != -1) {
            res += Query(root[pos][1], 0, sz - 1, idx, sz - 1);
          }
        }
        {
          int low = 0, high = sz - 1, posR = -1;
          while (low <= high) {
            int mid = low + high >> 1;
            if (xs[mid] > b[i]) {
              posR = mid;
              high = mid - 1;
            } else {
              low = mid + 1;
            }
          }
          low = 0, high = sz - 1;
          int posL = -1;
          while (low <= high) {
            int mid = low + high >> 1;
            if (xs[mid] <= b[i] - k[i] + 1) {
              posL = mid;
              low = mid + 1;
            } else {
              high = mid - 1;
            }
          }
          if (posR != -1 && posL != -1) {
            res += Query(root[posR][0], 0, sz - 1, 0, posL);
          }
          if (posR != -1 && idx != -1) {
            res -= Query(root[posR][1], 0, sz - 1, idx, sz - 1);
          }
        }
        cout << res << '\n';
      }
    }
  }
  return 0;
}

Compilation message

segments.cpp: In function 'void Modify(int&, int, int, int, int)':
segments.cpp:18:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   18 |   int mid = l + r >> 1;
      |             ~~^~~
segments.cpp: In function 'int Query(int, int, int, int, int)':
segments.cpp:30:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |   int mid = l + r >> 1;
      |             ~~^~~
segments.cpp: In function 'int main()':
segments.cpp:160:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  160 |             int mid = low + high >> 1;
      |                       ~~~~^~~~~~
segments.cpp:172:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  172 |             int mid = low + high >> 1;
      |                       ~~~~^~~~~~
segments.cpp:187:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  187 |             int mid = low + high >> 1;
      |                       ~~~~^~~~~~
segments.cpp:198:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  198 |             int mid = low + high >> 1;
      |                       ~~~~^~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 5 ms 2836 KB Output is correct
4 Correct 5 ms 2652 KB Output is correct
5 Correct 16 ms 6360 KB Output is correct
6 Correct 15 ms 6076 KB Output is correct
7 Correct 9 ms 3004 KB Output is correct
8 Correct 14 ms 5920 KB Output is correct
9 Correct 14 ms 5940 KB Output is correct
10 Correct 19 ms 6328 KB Output is correct
11 Correct 13 ms 5768 KB Output is correct
12 Correct 13 ms 5756 KB Output is correct
13 Correct 15 ms 6356 KB Output is correct
14 Correct 15 ms 5872 KB Output is correct
15 Correct 4 ms 2652 KB Output is correct
16 Correct 4 ms 2808 KB Output is correct
17 Correct 11 ms 3360 KB Output is correct
18 Correct 15 ms 6308 KB Output is correct
19 Correct 11 ms 3472 KB Output is correct
20 Correct 11 ms 3448 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5029 ms 38004 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 724 ms 8852 KB Output is correct
2 Correct 729 ms 8740 KB Output is correct
3 Correct 760 ms 9060 KB Output is correct
4 Correct 729 ms 8664 KB Output is correct
5 Execution timed out 5716 ms 65536 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 747 ms 9032 KB Output is correct
2 Correct 731 ms 8860 KB Output is correct
3 Correct 729 ms 8640 KB Output is correct
4 Correct 728 ms 8784 KB Output is correct
5 Runtime error 3619 ms 65536 KB Execution killed with signal 9
6 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 5 ms 2836 KB Output is correct
4 Correct 5 ms 2652 KB Output is correct
5 Correct 16 ms 6360 KB Output is correct
6 Correct 15 ms 6076 KB Output is correct
7 Correct 9 ms 3004 KB Output is correct
8 Correct 14 ms 5920 KB Output is correct
9 Correct 14 ms 5940 KB Output is correct
10 Correct 19 ms 6328 KB Output is correct
11 Correct 13 ms 5768 KB Output is correct
12 Correct 13 ms 5756 KB Output is correct
13 Correct 15 ms 6356 KB Output is correct
14 Correct 15 ms 5872 KB Output is correct
15 Correct 4 ms 2652 KB Output is correct
16 Correct 4 ms 2808 KB Output is correct
17 Correct 11 ms 3360 KB Output is correct
18 Correct 15 ms 6308 KB Output is correct
19 Correct 11 ms 3472 KB Output is correct
20 Correct 11 ms 3448 KB Output is correct
21 Execution timed out 5029 ms 38004 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #6
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 5 ms 2836 KB Output is correct
4 Correct 5 ms 2652 KB Output is correct
5 Correct 16 ms 6360 KB Output is correct
6 Correct 15 ms 6076 KB Output is correct
7 Correct 9 ms 3004 KB Output is correct
8 Correct 14 ms 5920 KB Output is correct
9 Correct 14 ms 5940 KB Output is correct
10 Correct 19 ms 6328 KB Output is correct
11 Correct 13 ms 5768 KB Output is correct
12 Correct 13 ms 5756 KB Output is correct
13 Correct 15 ms 6356 KB Output is correct
14 Correct 15 ms 5872 KB Output is correct
15 Correct 4 ms 2652 KB Output is correct
16 Correct 4 ms 2808 KB Output is correct
17 Correct 11 ms 3360 KB Output is correct
18 Correct 15 ms 6308 KB Output is correct
19 Correct 11 ms 3472 KB Output is correct
20 Correct 11 ms 3448 KB Output is correct
21 Execution timed out 5029 ms 38004 KB Time limit exceeded
22 Halted 0 ms 0 KB -