Submission #314405

#	Time	Username	Problem	Language	Result	Execution time	Memory
314405		urosk	Awesome Arrowland Adventure (eJOI19_adventure)	C++14	34 / 100	1 ms	640 KiB

adventure

#include <bits/stdc++.h>
#include <chrono>
#define ll long long
#define ull unsigned long long
#define ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define inf 1e15
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
using namespace std;
using namespace std::chrono;
/*auto start = high_resolution_clock::now();
auto stop = high_resolution_clock::now();
auto duration = duration_cast<microseconds>(stop - start);
cout << "Time taken by function: "
         << duration.count() << " microseconds" << endl;*/
const int maxn = 505;
int maxi = 500*500+1;
string a[maxn];
int n,m;
map<char,map<char,int> > mp;
int calc(int i,int j,int c,int bio[maxn][maxn]){
    if((i==n-1&&j==n-1)==true) return c;
    if(a[i][j]=='X') return maxi;
    int x=maxi,y=maxi,z=maxi,w=maxi;
    if(i<n-1&&bio[i+1][j]==0){
        bio[i+1][j]=1;
        if(a[i][j]!='S'||a[i][j]=='X') x = calc(i+1,j,c+mp[a[i][j]]['S'],bio);
        else x = calc(i+1,j,c,bio);
        bio[i+1][j]=0;
    }
    if(i>0&&bio[i-1][j]==0){
        bio[i-1][j]=1;
        if(a[i][j]!='N'||a[i][j]=='X') y = calc(i-1,j,c+mp[a[i][j]]['N'],bio);
        else y =calc(i-1,j,c,bio);
        bio[i-1][j]=0;
    }
    if(j>0&&bio[i][j-1]==0){
        bio[i][j-1]=1;
        if(a[i][j]!='W'||a[i][j]=='X') z = calc(i,j-1,c+mp[a[i][j]]['W'],bio);
        else z = calc(i,j-1,c,bio);
        bio[i][j-1]=0;
    }
    if(j<m-1&&bio[i][j+1]==0){
        bio[i][j+1]=1;
        if(a[i][j]!='E'||a[i][j]=='X') w = calc(i,j+1,c+mp[a[i][j]]['E'],bio);
        else w = calc(i,j+1,c,bio);
        bio[i][j+1]=0;
    }
    return min(x,min(y,min(z,w)));
}
int main(){
    cin >> n>> m;
    int k[maxn][maxn];
    for(int i = 0;i<n;i++){
        cin >> a[i];
    }
    mp['N']['E']=1;
    mp['N']['S']=2;
    mp['N']['W']=3;
    mp['E']['S']=1;
    mp['E']['W']=2;
    mp['E']['N']=3;
    mp['S']['W']=1;
    mp['S']['N']=2;
    mp['S']['E']=3;
    mp['W']['N']=1;
    mp['W']['E']=2;
    mp['W']['S']=3;
    if(n==1){
        string s = a[0];
        int ans = 0;
        for(int i = 0;i<m-1;i++){
            if(s[i]=='X') {
                    cout<<"-1";
                    goto Next;
            }
            if(s[i]!='E'){
                ans+=4-mp['E'][s[i]];
            }
        }
        cout<<ans;
        Next:;
    }else{
    int ans = calc(0,0,0,k);
    if(ans==maxi) printf("-1");
    else printf("%d",ans);
    }
}

Compilation message (stderr)

adventure.cpp:5:9: warning: ISO C++11 requires whitespace after the macro name
    5 | #define ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
      |         ^~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 0 / 16
• Subtask 5: 0 / 50