Submission #150059

#	Time	Username	Problem	Language	Result	Execution time	Memory
150059		TeamSUA (#200)	Bulb Game (FXCUP4_bulb)	C++17	0 / 100	2 ms	376 KiB

bulb

#include "bulb.h"
#include <bits/stdc++.h>
int ml[300010],ml2[300010];
int rc[300010],fa[300010];
bool ok[300010];
void dfs(int x, std::vector<int> &L, std::vector<int> &R) {
	if (L[x] > 0) {
		dfs(L[x], L, R);
		fa[L[x]] = x; 
		rc[L[x]] = rc[x];
		ml[x] = ml[L[x]];
		ml2[x] = ml2[L[x]];
	} else {
		ml[x] = L[x];
		ml2[x] = x;
	}
	if (R[x] > 0) {
		dfs(R[x], L, R);
		fa[R[x]] = x;
		rc[R[x]] = rc[x] + 1;
	}
}

void dfs2(int x, std::vector<int> &L, std::vector<int> &R) {
	if (x < 0) {
		return;
	}
	if (x > 0) {
		ok[x] = ok[fa[x]];
		if (x == L[fa[x]]) {
			ok[x] &= (ml[R[fa[x]]] == -1);
		} else {
			ok[x] &= (ml[L[fa[x]]] == -1);
		}
	}
	dfs2(L[x],L,R);
	dfs2(R[x],L,R);
}

int FindWinner(int T, std::vector<int> L, std::vector<int> R){
	int N = L.size();
	rc[0] = 0;
	dfs(0,L,R);
	ok[0] = true;
	dfs2(0,L,R);
	/*
	for (int i=0;i<N;i++) {
		printf("%d %d %d %d %d\n",i,ml[i],ml2[i],rc[i],ok[i]);
	}
	*/
	if (T % 2 == 1) {
		for (int i=0;i>=0;i=L[i]) {
			if (R[i] == -1 || (ml[R[i]] == -1)) {
				return 1;
			}
		}
		if (ml[0] == -1) {
			for (int i=0;i<N;i++) {
				if (ml2[i] != ml2[0]) {
					return 1;
				}
			}
		}
		return 0;
	} else {
		for (int i=0;i<N;i++) {
			if (rc[i] == 1 && ml[i] == -1 && i == ml2[i] && ok[i]) {
				return 1;
			}
		}
		return 0;
	}
}

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