oj.uz

Submission #630137

# Submission time Handle Problem Language Result Execution time Memory
630137 2022-08-15T17:56:49 Z flashmt Digital Circuit (IOI22_circuit) C++17
0 / 100
 634 ms 9596 KB 
#include <bits/stdc++.h>
#include "circuit.h"
using namespace std;
const int BASE = 1e9 + 2022;
const int N = 100100;

struct SegmentTree
{
  int low, mid, high;
  long long value, sum;
  int flip;
  SegmentTree *l, *r;

  SegmentTree(int low, int high, vector<long long> &coef, vector<int> &state): low(low), high(high)
  {
    mid = (low + high) / 2;
    value = sum = flip = 0;
    if (low == high)
    {
      l = r = NULL;
      sum = coef[low];
      value = state[low] * sum;
    }
    else
    {
      l = new SegmentTree(low, mid, coef, state);
      r = new SegmentTree(mid + 1, high, coef, state);
      sum = l->sum + r->sum;
      value = r->value + r->value;
    }
  }

  void update(int x, int y)
  {
    if (low == x && high == y)
    {
      value = sum - value;
      flip ^= 1;
      return;
    }
    if (x <= mid)
      l->update(x, min(y, mid));
    if (mid < y)
      r->update(max(x, mid + 1), y);
    value = l->value + r->value;
    if (flip)
      value = sum - value;
  }
};

int n, m;
vector<int> a[N];
vector<long long> coef, ways;
SegmentTree *tree;

void dfsWay(int x)
{
  if (empty(a[x]))
    return;
  for (int y : a[x])
  {
    dfsWay(y);
    ways[x] *= ways[y];
    ways[x] %= BASE;
  }
  ways[x] *= size(a[x]);
  ways[x] %= BASE;
}

void dfsCoef(int x)
{
  vector<long long> prefix(size(a[x]));
  for (int i = 0; i < size(a[x]); i++)
  {
    prefix[i] = ways[a[x][i]];
    if (i)
      prefix[i] = prefix[i] * prefix[i - 1] % BASE;
  }

  long long suffix = 1;
  for (int i = int(size(a[x])) - 1; i >= 0; i--)
  {
    int y = a[x][i];
    coef[y] = suffix;
    if (i)
      coef[y] = coef[y] * prefix[i - 1] % BASE;
    suffix *= ways[y];
    suffix %= BASE;
  }

  for (int y : a[x])
  {
    coef[y] = coef[y] * coef[x] % BASE;
    dfsCoef(y);
  }
}

void init(int N, int M, vector<int> P, vector<int> A)
{
  n = N;
  m = M;
  for (int i = 1; i < n + m; i++)
    a[P[i]].push_back(i);
  ways.assign(n + m, 1);
  dfsWay(0);
  coef.assign(n + m, 1);
  dfsCoef(0);
  for (int i = 0; i < m; i++)
    coef[i] = coef[i + n];
  coef.resize(m);
  tree = new SegmentTree(0, m - 1, coef, A);
}

int count_ways(int L, int R)
{
  tree->update(L - n, R - n);
  return tree->value;
}

Compilation message

circuit.cpp: In function 'void dfsCoef(int)':
circuit.cpp:73:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |   for (int i = 0; i < size(a[x]); i++)
      |                   ~~^~~~~~~~~~~~

Subtask #1
0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2640 KB Output is correct
2 Correct 1 ms 2640 KB Output is correct
3 Incorrect 2 ms 2768 KB 1st lines differ - on the 1st token, expected: '509', found: '357'
4 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2640 KB Output is correct
2 Incorrect 2 ms 2640 KB 1st lines differ - on the 1st token, expected: '52130940', found: '812966982'
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2640 KB Output is correct
2 Correct 1 ms 2640 KB Output is correct
3 Incorrect 2 ms 2768 KB 1st lines differ - on the 1st token, expected: '509', found: '357'
4 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 634 ms 9596 KB 1st lines differ - on the 1st token, expected: '431985922', found: '1057314848'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 634 ms 9596 KB 1st lines differ - on the 1st token, expected: '431985922', found: '1057314848'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2640 KB Output is correct
2 Incorrect 2 ms 2640 KB 1st lines differ - on the 1st token, expected: '52130940', found: '812966982'
3 Halted 0 ms 0 KB -

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2640 KB Output is correct
2 Correct 1 ms 2640 KB Output is correct
3 Incorrect 2 ms 2768 KB 1st lines differ - on the 1st token, expected: '509', found: '357'
4 Halted 0 ms 0 KB -

Subtask #8
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2640 KB Output is correct
2 Correct 1 ms 2640 KB Output is correct
3 Incorrect 2 ms 2768 KB 1st lines differ - on the 1st token, expected: '509', found: '357'
4 Halted 0 ms 0 KB -