Submission #235680

#	Time	Username	Problem	Language	Result	Execution time	Memory
235680		alishahali1382	Cop and Robber (BOI14_coprobber)	C++14	100 / 100	512 ms	7624 KiB

coprobber

#include <bits/stdc++.h>
#include "coprobber.h"
#pragma GCC optimize ("O2")
#pragma GCC optimize ("unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) {cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;}
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

int n, m, k, u, v, x, y, t, a, b, pos;
int dp[2][MAX_N][MAX_N]; // dp0:cop  dp1:robber
int cnt[MAX_N][MAX_N], deg[MAX_N];
queue<piii> Q;

int start(int n, bool A[MAX_N][MAX_N]){
	for (int i=0; i<n; i++) for (int j=0; j<n; j++) deg[i]+=A[i][j];
	for (int i=0; i<n; i++) for (int j=0; j<n; j++) cnt[i][j]=deg[j];
	memset(dp, -1, sizeof(dp));
	for (int i=0; i<n; i++){
		Q.push({{i, i}, 0});
		Q.push({{i, i}, 1});
		dp[0][i][i]=i;
		dp[1][i][i]=i;
	}
	while (Q.size()){
		int u=Q.front().first.first, v=Q.front().first.second, turn=Q.front().second;
		Q.pop();
		if (turn){
			for (int i=0; i<n; i++) if ((A[i][u] || i==u) && dp[0][i][v]==-1){
				dp[0][i][v]=u;
				Q.push({{i, v}, 0});
			}
		}
		else{
			for (int i=0; i<n; i++) if (A[i][v] && dp[1][u][i]==-1 && !--cnt[u][i]){
				dp[1][u][i]=v;
				Q.push({{u, i}, 1});
			}
		}
	}
	for (int i=0; i<n; i++){
		bool ok=1;
		for (int j=0; j<n && ok; j++) if (dp[0][i][j]==-1) ok=0;
		if (!ok) continue ;
		return pos=i;
	}
	return -1;
}

int nextMove(int R){
	pos=dp[0][pos][R];
    return pos;
}

• Subtask 1: 16 / 16
• Subtask 2: 14 / 14
• Subtask 3: 30 / 30
• Subtask 4: 40 / 40