Submission #720396

#	Time	Username	Problem	Language	Result	Execution time	Memory
720396		ismayil	Digital Circuit (IOI22_circuit)	C++17	9 / 100	10 ms	2472 KiB

circuit

#include "circuit.h"
#include <bits/stdc++.h>
#define ll long long
#define endl '\n'
using namespace std;
const int MAX = 3e3;
const int MOD = 1000002022;
ll dp[2][MAX];
vector<int> adj[MAX];
int n, m;
void init(int N, int M, vector<int> P, vector<int> A) {
    n = N, m = M;
	memset(dp, 0, sizeof(dp));
	for(int i = 0; i < N + M; i++){
		if(P[i] == -1) continue;
		adj[P[i]].push_back(i);
	}
    for(int i = 0; i < M; i++){
        dp[A[i]][i + n] = 1;
    }
}
void dfs(int u){
	if(u >= n) return;
	int l = -1, r = -1;
	for(auto v : adj[u]){
		dfs(v);
		if(l == -1) l = v;
		else r = v;
	}
	dp[0][u] = (dp[0][l] * dp[1][r] % MOD + dp[1][l] * dp[0][r] % MOD + 2 * dp[0][l] * dp[0][r] % MOD) % MOD;
	dp[1][u] = (dp[0][l] * dp[1][r] % MOD + dp[1][l] * dp[0][r] % MOD + 2 * dp[1][l] * dp[1][r] % MOD) % MOD;
}
int count_ways(int L, int R) {
	for(int i = L; i <= R; i++){
		dp[0][i] = 1 - dp[0][i];
		dp[1][i] = 1 - dp[1][i];
	}
	if(n == 1){
		int cnt = 0;
		for(int i = n; i < n + m; i++){
			cnt += dp[1][i];
		}
		return cnt;
	}
	dfs(0);
	return dp[1][0];
}

• 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