Submission #925889

#	Time	Username	Problem	Language	Result	Execution time	Memory
925889		vjudge1	Nautilus (BOI19_nautilus)	C++17	66 / 100	1022 ms	39948 KiB

nautilus

/*
no more temmy :(
*/

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp> 
using namespace __gnu_pbds;
// #include<icecream.hpp>
// using namespace icecream;
#define ll long long
#define int ll
#define ld long double
#define y1 cheza
// mt19937 rng(1983413);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
template<class T> using ordered_set = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const int N=510;
const int M=1e6;
const int B=317;
const int mod=998244353;
const int INF=1e18;
const int lg=64;
const int dx[]={1,-1,0,0};
const int dy[]={0,0,1,-1};
const double eps=1e-9;
int n,m,k;
char a[N][N];
int rv[N];
string s;
bool check(int x,int y){
    if(x<1||y<1||x>n||y>m||a[x][y]=='#')return 0;
    return 1;
}
vector<pair<int,int>>q,q2;
void shrink(){
    sort(q.begin(),q.end());
    q.resize(unique(q.begin(),q.end())-q.begin());
}
void test(){
    cin>>n>>m>>k;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>a[i][j];
        }
    }
    cin>>s;
  
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(a[i][j]=='.'){
                q.push_back({i,j});
            }
        }   
    }
    for(int i=0;i<k;i++){
        for(auto [x,y]:q){
            if(s[i]=='?'){
                for(int j=0;j<4;j++){
                    int x1=x+dx[j];
                    int y1=y+dy[j];
                    if(check(x1,y1)){
                        q2.push_back({x1,y1});
                    }
                }
            }
            else{
                for(int j=rv[s[i]];j<=rv[s[i]];j++){
                    int x1=x+dx[j];
                    int y1=y+dy[j];
                    if(check(x1,y1)){
                        q2.push_back({x1,y1});
                    }
                }
            }
        }
        q.swap(q2);
        q2.clear();
        shrink();
    }
    cout<<q.size()<<'\n';
}
/*

*/  
 
signed main(){
    rv['N']=1;
    rv['S']=0;
    rv['W']=3;
    rv['E']=2;
    // ic.prefix("debug->| ");
    // freopen("input.txt","r",stdin);
    // freopen("output.txt","w",stdout);

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    // cout.tie(nullptr);
    long long t2=1;
    //  cin>>t2;
    for(int i=1;i<=t2;i++){
        test();
    }
    
    return 0;
 
}

Compilation message (stderr)

nautilus.cpp: In function 'void test()':
nautilus.cpp:70:34: warning: array subscript has type 'char' [-Wchar-subscripts]
   70 |                 for(int j=rv[s[i]];j<=rv[s[i]];j++){
      |                                  ^
nautilus.cpp:70:46: warning: array subscript has type 'char' [-Wchar-subscripts]
   70 |                 for(int j=rv[s[i]];j<=rv[s[i]];j++){
      |                                              ^

• Subtask 1: 29 / 29
• Subtask 2: 37 / 37
• Subtask 3: 0 / 34