Submission #738519

#	Time	Username	Problem	Language	Result	Execution time	Memory
738519		math_rabbit_1028	Digital Circuit (IOI22_circuit)	C++17	2 / 100	3034 ms	8216 KiB

circuit

#include "circuit.h"

#include <vector>
#include <bits/stdc++.h>
using namespace std;

int n, m, onoff[101010], par[202020];
vector<int> adj[202020];

const long long MOD = 1000002022;
long long cnt[202020], wgt[202020], sum[101010];

void get_cnt(int v) {
  if (v < n) cnt[v] = adj[v].size();
  else cnt[v] = 1;
  for (int i = 0; i < adj[v].size(); i++) {
    int next = adj[v][i];
    get_cnt(next);
    cnt[v] = (cnt[v] * cnt[next]) % MOD;
  }
}

long long get_wgt(int v, int goal) {
  if (v == goal) return 1;
  for (int i = 0; i < adj[v].size(); i++) {
    int next = adj[v][i];
    long long ret = get_wgt(next, goal);
    if (ret > 0) {
      for (int j = 0; j < adj[v].size(); j++) {
        if (i != j) ret = (ret * cnt[adj[v][j]]) % MOD;
      }
      return ret;
    }
  }
  return 0;
}

struct seg {
  long long tree[404040], lazy[404040];
  vector<long long> arr;
  void init(int v, int st, int ed) {
    if (st == ed) {
      tree[v] = arr[st];
      lazy[v] = 0;
      return;
    }
    int mid = (st + ed) / 2;
    init(2 * v, st, mid);
    init(2 * v + 1, mid + 1, ed);
    tree[v] = tree[2 * v] + tree[2 * v + 1];
  }
  void update(int v, int st, int ed, int gs, int ge) {
    if (lazy[v] % 2 == 1) {
      tree[v] = sum[ed] - sum[st - 1] - tree[v];
      if (st != ed) {
        lazy[2 * v] += lazy[v];
        lazy[2 * v + 1] += lazy[v];
      }
      lazy[v] = 0;
    }
    if (gs > ed || ge < st) return;
    if (gs <= st && ed <= ge) {
      tree[v] = sum[ed] - sum[st - 1] - tree[v];
      if (st != ed) {
        lazy[2 * v] += 1;
        lazy[2 * v + 1] += 1;
      }
      return;
    }
    int mid = (st + ed) / 2;
    update(2 * v, st, mid, gs, ge);
    update(2 * v + 1, mid + 1, ed, gs, ge);
    tree[v] = tree[2 * v] + tree[2 * v + 1];
  }
  long long get(int v, int st, int ed, int gs, int ge) {
    if (lazy[v] % 2 == 1) {
      tree[v] = sum[ed] - sum[st - 1] - tree[v];
      if (st != ed) {
        lazy[2 * v] += lazy[v];
        lazy[2 * v + 1] += lazy[v];
      }
      lazy[v] = 0;
    }
    if (gs > ed || ge < st) return 0;
    if (gs <= st && ed <= ge) return tree[v];
    int mid = (st + ed) / 2;
    return get(2 * v, st, mid, gs, ge) + get(2 * v + 1, mid + 1, ed, gs, ge);
  }
} sumtree;

void init(int N, int M, std::vector<int> P, std::vector<int> A) {
  n = N;
  m = M;
  for (int i = 0; i < n + m; i++) par[i] = P[i];
  for (int i = 0; i < m; i++) onoff[i] = A[i];

  for (int i = 1; i < n + m; i++) {
    adj[par[i]].push_back(i);
  }
  get_cnt(0);
  for (int i = n; i < n + m; i++) wgt[i] = get_wgt(0, i);
  for (int i = n; i < n + m; i++) sum[i] = (sum[i - 1] + wgt[i]) % MOD;

  for (int i = 0; i < n; i++) sumtree.arr.push_back(0);
  for (int i = n; i < n + m; i++) sumtree.arr.push_back(onoff[i - n] * wgt[i]);
  sumtree.init(1, n, n + m - 1);
}

int count_ways(int L, int R) {
  sumtree.update(1, n, n + m - 1, L, R);
  return (sumtree.get(1, n, n + m - 1, n, n + m - 1)) % MOD;
}

Compilation message (stderr)

circuit.cpp: In function 'void get_cnt(int)':
circuit.cpp:16:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |   for (int i = 0; i < adj[v].size(); i++) {
      |                   ~~^~~~~~~~~~~~~~~
circuit.cpp: In function 'long long int get_wgt(int, int)':
circuit.cpp:25:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |   for (int i = 0; i < adj[v].size(); i++) {
      |                   ~~^~~~~~~~~~~~~~~
circuit.cpp:29:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |       for (int j = 0; j < adj[v].size(); j++) {
      |                       ~~^~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 0 / 7
• Subtask 3: 0 / 9
• Subtask 4: 0 / 4
• Subtask 5: 0 / 12
• Subtask 6: 0 / 27
• Subtask 7: 0 / 28
• Subtask 8: 0 / 11