제출 #446794

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
446794		Khizri	Awesome Arrowland Adventure (eJOI19_adventure)	C++17	100 / 100	93 ms	8488 KiB

adventure

#include <bits/stdc++.h>
using namespace std;
//------------------------------DEFINE------------------------------
//******************************************************************
#define IOS ios_base::sync_with_stdio(false); cin.tie(0),cout.tie(0)
#define ll long long
#define pb push_back		 
#define F first																 
#define S second 															 
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
#define endl "\n"
//******************************************************************
//----------------------------FUNCTION------------------------------
//******************************************************************
ll gcd(ll a,ll b){
	if(a>b) swap(a,b);
	if(a==0) return a+b;
	return gcd(b%a,a);
}
ll lcm(ll a,ll b){
	return a/gcd(a,b)*b;
}
bool is_prime(ll n){
	ll k=sqrt(n);
	if(n==2) return true;
	if(n<2||n%2==0||k*k==n) return false;
	for(int i=3;i<=k;i+=2){
		if(n%i==0){
			return false;
		}
	}
	return true;
}
//*****************************************************************
//--------------------------MAIN-CODE------------------------------
const int mxn=500+5;
ll t=1,n,m,dp[mxn][mxn],color[mxn][mxn];
char arr[mxn][mxn];
map<char,ll>mp;
ll f(char a,char b){
	if(mp[a]<=mp[b]){
		return mp[b]-mp[a];
	}
	return 4-mp[a]+mp[b];
}
void solve(){
	mp['N']=0;
	mp['E']=1;
	mp['S']=2;
	mp['W']=3;
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			cin>>arr[i][j];
			dp[i][j]=INF;
		}
	}
	priority_queue<pair<ll,pii>,vector<pair<ll,pii>>,greater<pair<ll,pii>>>q;
	q.push({0,{1,1}});
	while(q.size()){
		pair<ll,pii>p=q.top();
		q.pop();
		ll sum=p.F,i=p.S.F,j=p.S.S;
		if(color[i][j]){
			continue;
		}
		color[i][j]=1;
		dp[i][j]=sum;
		if(arr[i][j]=='X'){
			continue;
		}
		if(i+1<=n&&color[i+1][j]==0){
			q.push({sum+f(arr[i][j],'S'),{i+1,j}});
		}
		if(i-1>=1&&color[i-1][j]==0){
			q.push({sum+f(arr[i][j],'N'),{i-1,j}});
		}
		if(j+1<=m&&color[i][j+1]==0){
			q.push({sum+f(arr[i][j],'E'),{i,j+1}});
		}
		if(j-1>=1&&color[i][j-1]==0){
			q.push({sum+f(arr[i][j],'W'),{i,j-1}});
		}
	}
	if(dp[n][m]==INF){
		cout<<-1<<endl;
		return;
	}
	cout<<dp[n][m]<<endl;
}
int main(){
	IOS;
	//cin>>t;
	while(t--){
		solve();
	}
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 16 / 16
• Subtask 5: 50 / 50