Submission #1211647

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211647		serkanrashid	Digital Circuit (IOI22_circuit)	C++20	0 / 100	3066 ms	5728 KiB

circuit

#include <bits/stdc++.h>
#define endl "\n"

using namespace std;

const long long mod = 1e9 + 2022;

const int MAXN = 1e5+5;

int n,m;
int p[MAXN],a[MAXN];
vector<int>g[MAXN];

void init(int N, int M, vector<int> P, vector<int> A)
{
    n = N;
    m = M;
    for(int i = 0; i < n+m; i++)
    {
        p[i] = P[i];
        g[p[i]].push_back(i);
    }
    for(int i = 0; i < m; i++) a[i] = A[i];
}

long long dp[MAXN][2];
void dfs(int beg)
{
    if(beg >= n) return;

    for(int nb : g[beg]) dfs(nb);///smetnati

    int sz = g[beg].size();
    for(int mask = 0; mask < (1<<sz); mask++)
    {
        long long v = 1;
        int br1 = 0;
        for(int j = 0; j < sz; j++)
        {
            int ne = 0;
            if(mask & (1<<j)) ne = 1;
            br1 += ne;
            v *= dp[g[beg][j]][ne];
            v %= mod;
        }

        dp[beg][1] += (v*(sz-br1+1))%mod;
        dp[beg][1] %= mod;

        dp[beg][0] += (v*br1)%mod;
        dp[beg][0] %= mod;
    }
}

void solve()
{
    for(int i = 0; i < n+m; i++) dp[i][0] = dp[i][1] = 0;

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

• Subtask 1: 0 / 2
• Subtask 2: 0 / 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