Submission #793139

#	Time	Username	Problem	Language	Result	Execution time	Memory
793139		SlavicG	Digital Circuit (IOI22_circuit)	C++17	9 / 100	3057 ms	8996 KiB

circuit

#include <bits/stdc++.h>
#include "circuit.h"
using namespace std;
const int N = 2e5 + 5, mod = 1000002022;
vector<int> adj[N];
int64_t dp[N][2], color[N];
void dfs(int u) {
    if(adj[u].size() == 0) {
        if(color[u]) dp[u][0] = 0, dp[u][1] = 1;
        else dp[u][0] = 1, dp[u][1] = 0;
        return;
    }
    for(int v: adj[u]) dfs(v);
    vector<vector<int>> D((int)adj[u].size() + 1, vector<int>((int)adj[u].size() + 1));
    D[0][0] = 1;
    for(int i = 0; i < (int)adj[u].size(); ++i) {
        for(int j = 0; j <= i; ++j) {
            D[i + 1][j] += D[i][j] * dp[adj[u][i]][0] % mod;
            D[i + 1][j] %= mod;
            D[i + 1][j + 1] += D[i][j] * dp[adj[u][i]][1] % mod;
            D[i + 1][j + 1] %= mod; 
        }
    }
    dp[u][0] = dp[u][1] = 0;
    for(int i = 0; i <= (int)adj[u].size(); ++i) {
        dp[u][1] += D[(int)adj[u].size()][i] * i % mod;
        dp[u][1] %= mod;
        dp[u][0] += D[(int)adj[u].size()][i] * ((int)adj[u].size() - i) % mod;
        dp[u][0] %= mod;
    }
} 
void init(int N, int M, std::vector<int> P, std::vector<int> A) {
    for(int i = 1; i < N + M; ++i) {
        adj[P[i]].push_back(i);
    }
    for(int i = 0; i < M; ++i) color[i + N] = A[i];
    dfs(0);
}

int count_ways(int L, int R) {
    for(int i = L; i <= R; ++i) {
        color[i] ^= 1;
    }
    dfs(0);
    return dp[0][1];
}

• Subtask 1: 2 / 2
• Subtask 2: 7 / 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