| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 835719 | APROHACK | Digital Circuit (IOI22_circuit) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "circuit.h"
#include <bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define pb push_back
using namespace std;
int n, m;
vector<int>child[200001];
bool state[200001];
ll encen[200001][2]; // encendido y apagado
const ll MOD = 1000002022;
ll past[2002][2002];
void generate(int node);
int parent[200002];
bool casito = true;
ll aporte[200002];
ll prefix[200002];
ll T[200002];
ll ans = 0;
void precalc(int node){
T[node] = 1;
if(node >= n)return ;
for(int i = 0 ; i < child[node].size() ; i ++){
precalc(child[node][i]);
T[node] = T[node] * T[child[node][i]] % MOD;
}
T[node] = T[node] * (ll)child[node].size() % MOD;
}
void calcPrefix(int node, ll acum){
if(node >= n){
aporte[node] = acum;
return ;
}
int hijo1 = child[node][0];
int hijo2 = child[node][1];
calcPrefix(hijo1, (acum * T[hijo2]) % MOD);
calcPrefix(hijo2, (acum * T[hijo1]) % MOD);
}
void init(int N, int M, std::vector<int> P, std::vector<int> A) {
n = N;
m = M;
if( m != n+1 )casito = false;
for(int i = 0 ; i < n+m ; i ++){
if(P[i] != -1){
child[P[i]].pb(i);
if(P[i] != (i-1)/2)casito = false;
}
parent[i] = P[i];
}
int temp = m;
while(temp != 1){
if(temp % 2 == 1)casito = false;
temp /= 2;
}
//assert(casito);
for(int i = N ; i <= N+M ; i ++)state[i] = A[i-N];
memset(past, -1, sizeof past);
generate(0);
ans = encen[0][0];
if(false or ( casito and (n > 1000 or m > 1000) ) ){
recalc(0);
calcPrefix(0, 1);
prefix[0] = 0;
for(int i = 1 ; i < N+M ; i ++){
prefix[i] = (prefix[i-1] + aporte[i]) % MOD;
}
}
}
ll mem[2002][2002];
ll currentIt = -1 ;
void newDp(){
currentIt++;
}
ll dp(int parent, ll i, int k){
if(k < 0)return 0;
if(i == child[parent].size() and k > 0)return 0;
else if(i == child[parent].size()) return 1;
if(past[i][k] == currentIt)return mem[i][k];
past[i][k] = currentIt;
return mem[i][k] = ((dp(parent, i+1, k-1) * encen[child[parent][i]][0] % MOD) + ((dp(parent, i+1, k) * encen[child[parent][i]][1])%MOD))%MOD;
}
void generate(int node){
if(node >= n){
if(state[node]){
encen[node][0] = 1;
encen[node][1] = 0;
}else{
encen[node][0] = 0;
encen[node][1] = 1;
}
return ;
}
for(int i = 0 ; i < child[node].size() ; i ++){
generate(child[node][i]);
}
newDp();
ll enc = 0, inv = 0;
for(ll i = 1 ; i <= child[node].size() ; i ++){
enc += dp(node, 0, i) * i % MOD;
enc %= MOD;
}
ll allWays = 1;
for(int i = 0 ; i < child[node].size() ; i ++){
allWays *= (encen[child[node][i]][0] + encen[child[node][i]][1])%MOD;
allWays %= MOD;
}
allWays *= (ll)child[node].size();
allWays %= MOD;
encen[node][0] = enc;
encen[node][1] = ((allWays - enc) + MOD) % MOD;
//cout << "for node " << node << " there are " << encen[node][0] << ", " << encen[node][1] << "\n";
}
int count_ways(int L, int R) {
for(int i = L ; i <= R ; i ++){
state[i] = !state[i];
}
if(false or ( L == R and casito and (n > 1000 or m > 1000) ) ){
if(state[L])ans += aporte[L];
else ans -= aporte[L];
return ans;
}
else generate(0);
return encen[0][0];
}