Submission #835465

#	Time	Username	Problem	Language	Result	Execution time	Memory
835465		gagik_2007	Digital Circuit (IOI22_circuit)	C++17	18 / 100	9 ms	2136 KiB

circuit

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

typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> pii;
typedef pair<ll, ll> pll;

#define ff first
#define ss second

ll ttt;
const ll INF=1e18;
const ll MOD=1e9+2022;
const ll N=2007;
ll n,m,k;
vector<ll>g[N];
vector<ll>p;
vector<ll>a;
ll tot[N];
ll dp[N];

void calc_tot(ll v){
    if(!g[v].size()){tot[v]=1;return;}
    tot[v]=g[v].size();
    for(ll to:g[v]){
        calc_tot(to);
        tot[v]*=tot[to];
        tot[v]%=MOD;
    }
}

void calc_dp(ll v){
    if(!g[v].size()){
        dp[v]=a[v];
        return;
    }
    for(ll to:g[v])calc_dp(to);
    vector<ll>d;
    ll cur=1;
    for(ll to:g[v]){
        d.push_back(cur);
        cur*=tot[to];
        cur%=MOD;
    }
    cur=1;
    ll sum=0;
    // cout<<"DDDDD\n";
    for(ll i=g[v].size()-1;i>=0;i--){
        // cout<<g[v][i]<<": "<<d[i]<<" ";
        d[i]*=cur;
        d[i]%=MOD;
        // cout<<d[i]<<" ";
        d[i]*=dp[g[v][i]];
        d[i]%=MOD;
        // cout<<d[i]<<endl;
        sum+=d[i];
        sum%=MOD;
        cur*=tot[g[v][i]];
        cur%=MOD;
    }
    dp[v]=sum;
}

void init(int NN, int MM, vector<int> P, vector<int> A) {
    n=NN;
    m=MM;
    for(ll v=1;v<n+m;v++){
        g[P[v]].push_back(v);
        // g[v].push_back(P[v]);
    }
    for(int x:P)p.push_back(x);
    a.resize(n+m,0);
    for(ll i=0;i<m;i++){
        a[i+n]=A[i];
    }
    calc_tot(0);
    // for(ll v=0;v<n+m;v++){
    //     cout<<v<<": "<<tot[v]<<endl;
    // }
}

int count_ways(int L, int R) {
    for(ll i=L;i<=R;i++){
        a[i]=!a[i];
    }
    calc_dp(0);
    // for(ll v=0;v<n+m;v++){
    //     cout<<v<<": "<<dp[v]<<", "<<a[v]<<endl;
    // }
    return dp[0];
}

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