Submission #568156

#	Time	Username	Problem	Language	Result	Execution time	Memory
568156		mat_v	Nautilus (BOI19_nautilus)	C++14	100 / 100	212 ms	968 KiB

nautilus

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>

#define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
#define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
#define mod 998244353
#define xx first
#define yy second
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define ll long long
#define pii pair<int,int>


using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update> ordered_set;/// find_by_order(x)(x+1th) , order_of_key() (strictly less)
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());



int n,m,k;

bitset<502*502> doz, poc;

int main()
{

    ios_base::sync_with_stdio(false); cin.tie(0);

    cin >> n >> m >> k;

    ff(j,0,m+1)doz[j] = 0;
    ff(j,0,m+1)doz[j+(n+1)*(m+2)] = 0;

    ff(i,1,n){
        string s;
        cin >> s;
        doz[i*(m+2)] = 0;
        doz[i*(m+2)+m+1] = 0;
        ff(j,0,m - 1){
            if(s[j] == '.')doz[i*(m+2)+j+1] = 1;
            else doz[i*(m+2)+j+1] = 0;
        }
    }
    poc = doz;
    string s;
    cin >> s;
    ff(i,0,k - 1){
        if(s[i] == 'N'){
            poc = doz&(poc>>(m+2));
        }
        if(s[i] == 'E'){
            poc = doz&(poc<<1);
        }
        if(s[i] == 'W'){
            poc = doz&(poc>>1);
        }
        if(s[i] == 'S'){
            poc = doz&(poc<<(m+2));
        }
        if(s[i] == '?'){
            poc = doz&((poc<<1)|(poc>>1)|(poc<<(m+2))|(poc>>(m+2)));
        }
    }
    int ans = 0;
    ff(i,1,n){
        ff(j,1,m){
            if(poc[i*(m+2)+j])ans++;
        }
    }
    cout << ans << "\n";
    return 0;
}

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
nautilus.cpp:35:5: note: in expansion of macro 'ff'
   35 |     ff(j,0,m+1)doz[j] = 0;
      |     ^~
nautilus.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
nautilus.cpp:36:5: note: in expansion of macro 'ff'
   36 |     ff(j,0,m+1)doz[j+(n+1)*(m+2)] = 0;
      |     ^~
nautilus.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
nautilus.cpp:38:5: note: in expansion of macro 'ff'
   38 |     ff(i,1,n){
      |     ^~
nautilus.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
nautilus.cpp:43:9: note: in expansion of macro 'ff'
   43 |         ff(j,0,m - 1){
      |         ^~
nautilus.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
nautilus.cpp:51:5: note: in expansion of macro 'ff'
   51 |     ff(i,0,k - 1){
      |     ^~
nautilus.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
nautilus.cpp:69:5: note: in expansion of macro 'ff'
   69 |     ff(i,1,n){
      |     ^~
nautilus.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
nautilus.cpp:70:9: note: in expansion of macro 'ff'
   70 |         ff(j,1,m){
      |         ^~

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