oj.uz

Submission #943780

# Submission time Handle Problem Language Result Execution time Memory
943780 2024-03-11T21:54:33 Z stefanneagu XORanges (eJOI19_xoranges) C++17
100 / 100
 459 ms 22060 KB 
#include <bits/stdc++.h>

using namespace std;

const int nmax = 5e5 + 1;

struct AINT {
  int aint[nmax * 4];

  void init() {
    memset(aint, 0, sizeof(aint));
  }

  void update(int nod, int st, int dr, int poz, int val) {
    if(st == dr) {
      aint[nod] = val;
      return;
    }
    int mid = (st + dr) / 2;
    if(poz <= mid) {
      update(nod * 2, st, mid, poz, val);
    } else {
      update(nod * 2 + 1, mid + 1, dr, poz, val);
    }
    aint[nod] = (aint[nod * 2] ^ aint[nod * 2 + 1]);
  }

  int query(int nod, int st, int dr, int l, int r) {
    if(l <= st && dr <= r) {
      return aint[nod];
    }
    int mid = (st + dr) / 2, a1 = 0, a2 = 0;
    if(l <= mid) {
      a1 = query(nod * 2, st, mid, l, min(r, mid));
    }
    if(r > mid) {
      a2 = query(nod * 2 + 1, mid + 1, dr, max(l, mid + 1), r);
    }
    return (a1 ^ a2);
  }
};

int main() {
  AINT s1, s2;
  /*
  for(int i = 1; i <= 5; i ++) {
    s1.update(1, 1, 5, i, i);
  }
  for(int i = 1; i <= 5; i ++) {
    cout << s1.query(1, 1, 5, i, i) << ' ';
  }
  cout << '\n';
  */
  s1.init();
  s2.init();
  int n, q;
  cin >> n >> q;
  int ok = n % 2;
  for(int i = 1; i <= n; i ++) {
    int a;
    cin >> a;
    if(i % 2 == 0) {
      s1.update(1, 1, n / 2, i / 2, a);
      // cout << s1.query(1, 1, n / 2 + 1, i / 2, i / 2) << " ";
    } else {
      s2.update(1, 1, n / 2 + ok, i / 2 + 1, a);
      // cout << s2.query(1, 1, n / 2 + 1, i / 2 + 1, i / 2 + 1) << " ";
    }
  }
  // cout << '\n';
  // cout << "sirul: ";
  /*
  for(int ii = 1; ii <= n; ii ++) {
    if(ii % 2 == 0) {
      cout << s1.query(1, 1, n / 2, ii / 2, ii / 2) << " ";
    } else {
      cout << s2.query(1, 1, n / 2 + ok, ii / 2 + 1, ii / 2 + 1) << " ";
    }
  }
  cout << '\n';
  */
  for(int i = 1; i <= q; i ++) {
    int t, a, b;
    cin >> t >> a >> b;
    if(t == 1) {
      if(a % 2 == 0) {
        s1.update(1, 1, n / 2, a / 2, b);
      } else {
        s2.update(1, 1, n / 2 + ok, a / 2 + 1, b);
      }
    } else {
      if((b - a + 1) % 2 == 0) {
        cout << "0\n";
      } else if(a % 2 == 0) {
        cout << s1.query(1, 1, n / 2, a / 2, b / 2) << '\n';
      } else {
        cout << s2.query(1, 1, n / 2 + ok, a / 2 + 1, b / 2 + 1) << '\n';
      }
    }
  }
  return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 15908 KB Output is correct
2 Correct 9 ms 15964 KB Output is correct
3 Correct 9 ms 15952 KB Output is correct
4 Correct 9 ms 15960 KB Output is correct
5 Correct 9 ms 15964 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 15964 KB Output is correct
2 Correct 10 ms 15860 KB Output is correct
3 Correct 9 ms 15964 KB Output is correct
4 Correct 9 ms 16216 KB Output is correct
5 Correct 10 ms 15964 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 15908 KB Output is correct
2 Correct 9 ms 15964 KB Output is correct
3 Correct 9 ms 15952 KB Output is correct
4 Correct 9 ms 15960 KB Output is correct
5 Correct 9 ms 15964 KB Output is correct
6 Correct 9 ms 15964 KB Output is correct
7 Correct 10 ms 15860 KB Output is correct
8 Correct 9 ms 15964 KB Output is correct
9 Correct 9 ms 16216 KB Output is correct
10 Correct 10 ms 15964 KB Output is correct
11 Correct 21 ms 15964 KB Output is correct
12 Correct 16 ms 15964 KB Output is correct
13 Correct 21 ms 15960 KB Output is correct
14 Correct 20 ms 15964 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 442 ms 22044 KB Output is correct
2 Correct 438 ms 21940 KB Output is correct
3 Correct 459 ms 22060 KB Output is correct
4 Correct 439 ms 21896 KB Output is correct
5 Correct 422 ms 21788 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 15908 KB Output is correct
2 Correct 9 ms 15964 KB Output is correct
3 Correct 9 ms 15952 KB Output is correct
4 Correct 9 ms 15960 KB Output is correct
5 Correct 9 ms 15964 KB Output is correct
6 Correct 9 ms 15964 KB Output is correct
7 Correct 10 ms 15860 KB Output is correct
8 Correct 9 ms 15964 KB Output is correct
9 Correct 9 ms 16216 KB Output is correct
10 Correct 10 ms 15964 KB Output is correct
11 Correct 21 ms 15964 KB Output is correct
12 Correct 16 ms 15964 KB Output is correct
13 Correct 21 ms 15960 KB Output is correct
14 Correct 20 ms 15964 KB Output is correct
15 Correct 442 ms 22044 KB Output is correct
16 Correct 438 ms 21940 KB Output is correct
17 Correct 459 ms 22060 KB Output is correct
18 Correct 439 ms 21896 KB Output is correct
19 Correct 422 ms 21788 KB Output is correct
20 Correct 371 ms 21844 KB Output is correct
21 Correct 343 ms 21856 KB Output is correct
22 Correct 326 ms 21840 KB Output is correct
23 Correct 424 ms 21724 KB Output is correct
24 Correct 411 ms 21588 KB Output is correct