Submission #149135

#	Time	Username	Problem	Language	Result	Execution time	Memory
149135		还没编好 (#200)	Bulb Game (FXCUP4_bulb)	C++17	0 / 100	1065 ms	376 KiB

bulb

#include "bulb.h"
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef long long ll;
typedef pair<int,int> PII;
const ll mod=1000000007;
ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
// head

const int N=301000;
VI l,r;
int n;
int gol[N],gor[N];

int dfs(int u) {
	if (u<0) return u;
	else {
		gol[u]=dfs(l[u]);
		gor[u]=dfs(r[u]);
		return gol[u];
	}
}

int FindWinner(int T, std::vector<int> L, std::vector<int> R){
	l=L; r=R;
	n=L.size();
	auto check=[&] () {
		dfs(0);
		int p=0;
		int cnt=0;
		while (p>=0) {
			if (gor[p]==-2) return 0;
			p=l[p];
			cnt++;
		}
		if (gol[0]==-2&&cnt!=n) return 0;
		return 1;
	};
	dfs(0);
	if (gol[0]==-2) return 0;
	for (int p=0;p<n;p++) {
		swap(l[p],r[p]);
		if (check()) return 1;
		swap(l[p],r[p]);
		p=l[p];
	}
	return 0;
}

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