Submission #1222861

#	Time	Username	Problem	Language	Result	Execution time	Memory
1222861		cpdreamer	Digital Circuit (IOI22_circuit)	C++20	46 / 100	3050 ms	6368 KiB

circuit

#include "circuit.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
const long long INF = 1e17;
typedef long long ll;
const ll MOD = 1000002022;
#define S second
#define F first
#define pb push_back
#define V vector
#define all(v) v.begin(), v.end()
V<int>adj[(int)1e5+1];
ll dp[(int)2e5+1];
bool f[(int)2e5+1];
int a[(int)2e5+1];
ll b[(int)2e5+1];
int na,ma;
ll add(ll a,ll b) {
    return ((a%MOD)+(b%MOD))%MOD;
}
ll mul(ll a,ll b) {
    return ((a%MOD*(b%MOD)))%MOD;
}
void dfs(int n,int p) {
    ll ch=(ll)adj[n].size()-1+(n==0);
    if (ch==0) {
        dp[n]=1;
        if (a[n]) {
            f[n]=true;
        }
        return;
    }
    for (auto u:adj[n]) {
        if (u==p)continue;
        dfs(u,n);
    }
    ll x=1;
    for (auto u:adj[n]) {
        if (u==p)continue;
        x=mul(x,dp[u]);
        f[n]|=f[u];
    }
    if (!f[n]) {
        x=mul(x,ch);
    }
    dp[n]=x;
}
void init(int N, int M, std::vector<int> P, std::vector<int> A) {
    na=N;
    ma=M;
    for (int i =1;i<N+M;i++) {
        adj[i].pb(P[i]);
        adj[P[i]].pb(i);
    }
    for (int i=0;i<M;i++) {
        a[i+N]=0;
    }
    for (int i=0;i<M;i++) {
        a[i+N]=1;
        for (int j=0;j<N+M;j++) {
            f[j]=false;
        }
        dfs(0,-1);
        b[i+N]=dp[0];
        a[i+N]=0;
    }
    for (int i=0;i<M;i++){
        a[i+N]=A[i];
    }
}
int count_ways(int L, int R) {
    for (int i=L;i<=R;i++) {
        a[i]^=1;
    }
    ll x=0;
    for (int i=0;i<ma;i++) {
        if (a[i+na]==1) {
            x=add(x,b[i+na]);
        }
    }
    x%=MOD;
    return (int)x;
}

• 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: 28 / 28
• Subtask 8: 0 / 11