Submission #1080675

#	Time	Username	Problem	Language	Result	Execution time	Memory
1080675		asdasdqwer	Digital Circuit (IOI22_circuit)	C++17	18 / 100	3053 ms	4932 KiB

circuit

#include "circuit.h"

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

const int MOD = 1000002022;
vector<vector<int>> child;
vector<long long> dp1, dp2;
int n,m;
vector<int> a;

void calc(int node = 0) {
    // cout << node << endl;
    if (child[node].size() == 0) {
        dp1[node] = a[node-n];
        dp2[node] = 1-a[node-n];
        return;
    }

    vector<long long> dp3(child[node].size()+1, 0);
    dp3[0]=1;
    for (int &x:child[node]){
        calc(x);
        for (int i=(int)dp3.size()-1;i>0;i--) {
            dp3[i] = (dp3[i] + dp1[x] * dp3[i-1]) % MOD;
            dp3[i-1] = (dp3[i-1] * dp2[x]) % MOD;
        }

        // for (auto &x:dp3) {
        //     cout<<x<<" ";
        // }
        // cout<<endl;
    }

    // cout << "node " << node << "\n";

    // cout << "end " << node << endl;
    dp1[node] = dp2[node] = 0;
    for (int i=0;i<(int)dp3.size();i++) {
        dp1[node] = (dp1[node] + dp3[i] * i) % MOD;
        dp2[node] = (dp2[node] + dp3[i] * ((int)dp3.size() - i - 1)) % MOD;
    }

    // cout << dp1[node] << " " << dp2[node] << endl;
    // cout << endl;
}

void init(int N, int M, std::vector<int> P, std::vector<int> A) {
    n = N;m=M;
    a = A;
    child.resize(n+m);
    for (int i=1;i<N+M;i++) {
        child[P[i]].push_back(i);
    }
    dp1.resize(n+m);
    dp2.resize(n+m);
}

int count_ways(int L, int R) {
    // cout << "first print a" << endl;
    for (int i=L-n;i<=R-n;i++) {
        a[i] = 1-a[i];
    }

    // for (int i=0;i<m;i++) {
    //     cout<<a[i]<<" ";
    // }
    // cout<<"\n";

    calc();

    return dp1[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