Submission #1016610

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016610		Whisper	Nautilus (BOI19_nautilus)	C++17	66 / 100	14 ms	9672 KiB

nautilus

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (b); i >= (a); i --)
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define REPD(i, n) for (int i = (n) - 1; i >= 0; --i)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)


constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

/*
    Phu Trong from Nguyen Tat Thanh High School for gifted student
*/

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
int numRow, numCol, numSign;

#define MAX             111
#define MAX_SIGN        111

char A[MAX][MAX];
char sign[MAX_SIGN];

int dp[MAX][MAX][MAX_SIGN];

const int dx[] = {1, -1, 0, 0};
const int dy[] = {0, 0, -1, 1};

pair<int, int> conv(char s){
    if (s == 'N') return make_pair(-1, 0);
    if (s == 'S') return make_pair(1, 0);
    if (s == 'W') return make_pair(0, -1);
    return make_pair(0, 1);
}

bool inside(int x, int y){
    return (x >= 1 && x <= numRow && y >= 1 && y <= numCol && A[x][y] != '#');
}

void process(void){
    cin >> numRow >> numCol >> numSign;
    FOR(i, 1, numRow) FOR(j, 1, numCol) cin >> A[i][j];
    REP(i, numSign) cin >> sign[i];
    FOR(x, 1, numRow) FOR(y, 1, numCol) if (A[x][y] != '#')
        dp[0][x][y] = 1;

    for (int i = 0; i < numSign; ++i){
        FOR(x, 1, numRow) FOR(y, 1, numCol) if(A[x][y] != '#'){
            if(sign[i] == '?'){
                REP(dir, 4){
                    int nx = x + dx[dir], ny = y + dy[dir];
                    if (inside(nx, ny)){
                        dp[i + 1][nx][ny] |= dp[i][x][y];
                    }
                }
            }
            else{
                pair<int, int> dir = conv(sign[i]);
                int nx = x + dir.first;
                int ny = y + dir.second;
                if (inside(nx, ny)) dp[i + 1][nx][ny] |= dp[i][x][y];
            }
        }
    }
    int ans = 0;
    FOR(x, 1, numRow) FOR(y, 1, numCol) ans += dp[numSign][x][y];
    cout << ans;
}
signed main(){
    #define name "Whisper"
    cin.tie(nullptr) -> sync_with_stdio(false);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);

    process();
}

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