Submission #1058530

#	Time	Username	Problem	Language	Result	Execution time	Memory
1058530		SalihSahin	Digital Circuit (IOI22_circuit)	C++17	2 / 100	105 ms	2500 KiB

circuit

#include<bits/stdc++.h>
#define pb push_back
using namespace std;
#include "circuit.h"
#define ll long long

const int M = 2000;

int mod = 10121101010;

int add(ll a, ll b){
  return ((a%mod) + (b%mod))%mod;
}

int mul(ll a, ll b){
  return ((a%mod) * (b%mod))%mod;
}

vector<int> state(M);
vector<int> ch[2 * M];
int n;

pair<int, int> dfs(int node){ // {kac sekilde 0, kac sekilde 1}
  if(node >= n){
     if(state[node - n]) return {0, 1};
     else return {1, 0};
  }

  vector<pair<int, int> > sub;
  int c = ch[node].size();
  for(auto itr: ch[node]){
     sub.pb(dfs(itr));
  }

  vector<ll> dp(c+1), ndp(c+1);
  dp[0] = 1;
  for(auto itr: sub){
    for(int i = 0; i <= c; i++){
       ndp[i] = mul(dp[i], itr.first);
       if(i) ndp[i] = add(ndp[i], mul(dp[i-1], itr.second));
    }
    dp = ndp;
  }

  pair<ll, ll> val;
  for(int i = 1; i <= c; i++){
    for(int j = 0; j <= c; j++){
       if(i > j) val.first = add(val.first, dp[j]);
       else val.second = add(val.second, dp[j]);
    }
  }

  return val;
}

void init(int N, int M, std::vector<int> P, std::vector<int> A) {
   n = N;
   for(int i = 1; i < N + M; i++){
      ch[P[i]].pb(i);
   }
   for(int i = 0; i < M; i++) state[i] = A[i];
   return;
}

int count_ways(int L, int R) {
  L -= n;
  R -= n;

  for(int i = L; i <= R; i++){
    state[i] ^= 1;
  }

  pair<ll, ll> ans = dfs(0);
  return ans.second;
}

Compilation message (stderr)

circuit.cpp:9:11: warning: overflow in conversion from 'long int' to 'int' changes value from '10121101010' to '1531166418' [-Woverflow]
    9 | int mod = 10121101010;
      |           ^~~~~~~~~~~

• 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