Submission #211680

#	Time	Username	Problem	Language	Result	Execution time	Memory
211680		thebes	Bulb Game (FXCUP4_bulb)	C++17	0 / 100	5 ms	384 KiB

bulb

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

typedef vector<int> vi;
typedef pair<int,int> pii;
#define pb push_back

const int MN = 3e5+5;
int N, i, res[MN], w[MN][2], vs[MN], f, f2, f3, f4;
pii ed[MN];

int acc(int n){
    if(n<0) return 0;
    if(res[n]) return res[n];
    res[n]=ed[n].first<0?ed[n].first:acc(ed[n].first);
    return res[n];
}

void solve(int n){
    if(n<0) return;
    if(vs[n]) return;
    vs[n] = 1;
    solve(ed[n].first);
    solve(ed[n].second);
    w[n][0]=ed[n].first<0?ed[n].first:w[ed[n].first][0];
    if(ed[n].first>=0) w[n][1]|=w[ed[n].first][1];
    if(ed[n].second>=0) w[n][1]|=(w[ed[n].second][0]==-1);
    else if(ed[n].second==-1) w[n][1]=1;
}

int ok(int n){
    while(n>=0){
        if(ed[n].second==-2||acc(ed[n].second)==-2) return 0;
        n=ed[n].first;
    }
    return n==-1;
}

int FindWinner(int T,vi L,vi R){
    N = L.size();
    int cur = 0;
    for(i=0;i<N;i++) ed[i]={L[i],R[i]};
    while(cur>=0){
        solve(ed[cur].second);
        if(!f2){
            if(ok(ed[cur].second)) f=1;
        }
        if(ed[cur].second>=0){
            if(w[ed[cur].second][1]) f3=1;
            if(ed[cur].second==-2||acc(ed[cur].second)==-2) f4=1;
        }
        if(ed[cur].second==-2||acc(ed[cur].second)==-2) f2++;
        cur = ed[cur].first;
    }
    if(acc(0)==-2) return 0;
    else return f|(f3&&(f2-f4==0));
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 25
• Subtask 3: 0 / 64