Submission #218165

#	Time	Username	Problem	Language	Result	Execution time	Memory
218165		Sho10	Awesome Arrowland Adventure (eJOI19_adventure)	C++14	38 / 100	6 ms	384 KiB

adventure

/*
ID: Sho10
LANG: C++
*/
#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho10
#define ll long long int
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define sz size
#define f first
#define s second
#define pb push_back
#define er erase
#define in insert
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 1000000007
#define PI 3.14159265359
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n,m,dp[3][505];
char a[505][505];
int32_t main(){
CODE_START;
cin>>n>>m;
for(ll i=1;i<=n;i++)
{
    for(ll j=1;j<=m;j++)
    cin>>a[i][j];
}
if(n==2){
for(ll j=1;j<=m-1;j++)
{
    if(a[1][j]=='X'&&a[1][j]=='X'){
        rc("-1");
    }else if(j+1<=m){
    if(a[1][j]=='X'&&a[2][j+1]=='X'){
        rc("-1");
    }else if(a[2][j]=='X'&&a[1][j+1]=='X'){
    rc("-1");
    }
}
}
dp[1][1]=0;
if(a[1][1]=='E'){
    dp[2][1]=1;
}else if(a[1][1]=='N'){
dp[2][1]=2;
}else if(a[1][1]=='W'){
dp[2][1]=3;
}else if(a[1][1]=='S'){
dp[2][1]=0;
}
for(ll j=2;j<=m;j++)
{
    ll s1=0;
    if(a[1][j-1]=='E'){
        s1=0;
    }else if(a[1][j-1]=='N'){
    s1=1;
    }else if(a[1][j-1]=='W'){
    s1=2;
    }else if(a[1][j-1]=='S'){
    s1=3;
    }
    dp[1][j]=dp[1][j-1]+s1;
    s1=0;
if(a[2][j-1]=='E'){
        s1=0;
    }else if(a[2][j-1]=='N'){
    s1=1;
    }else if(a[2][j-1]=='W'){
    s1=2;
    }else if(a[2][j-1]=='S'){
    s1=3;
    }
    dp[2][j]=dp[2][j-1]+s1;
    s1=0;
    if(a[1][j]=='E'){
        s1=1;
    }else if(a[1][j]=='N'){
    s1=2;
    }else if(a[1][j]=='W'){
    s1=3;
    }
    dp[2][j]=min(dp[2][j],dp[1][j]+s1);
    s1=0;
    if(a[2][j]=='N'){
        s1=0;
    }else if(a[2][j]=='W'){
    s1=1;
    }else if(a[2][j]=='S'){
    s1=2;
    }else if(a[2][j]=='E'){
    s1=3;
    }
    dp[1][j]=min(dp[1][j],dp[2][j]+s1);
}
cout<<dp[2][m]<<endl;
}else {
 
ll ans=0;
for(ll i=1;i<=n;i++)
for(ll j=1;j<=m-1;j++)
if(a[i][j]=='X'){
    cout<<"-1"<<endl;
    return 0;
}else if(a[i][j]=='S'){
ans=ans+3;
}else if(a[i][j]=='W'){
ans=ans+2;
}else if(a[i][j]=='N'){
ans++;
}
cout<<ans<<endl;
}
}
 
 

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