oj.uz

답안 #527938

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
527938 2022-02-18T19:57:13 Z jalsol Nautilus (BOI19_nautilus) C++11
66 / 100
 502 ms 262148 KB 
#include <bits/stdc++.h>

using namespace std;

#define Task ""

struct __Init__ {
    __Init__() {
        cin.tie(nullptr)->sync_with_stdio(false);
        if (fopen(Task".inp", "r")) {
            freopen(Task".inp", "r", stdin);
            freopen(Task".out", "w", stdout); }
    }
} __init__;

using ll = long long;

#ifdef LOCAL
//#define debug(x) cerr << "[" #x " = " << x << "]\n";
#include "debugger.h"
#else
#define debug(...)
#endif // LOCAL

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define fi first
#define se second

#define For(i, l, r) for (int i = (l); i <= (r); ++i)
#define Ford(i, r, l) for (int i = (r); i >= (l); --i)
#define Rep(i, n) For (i, 0, (n) - 1)
#define Repd(i, n) Ford (i, (n) - 1, 0)

template<class C> int isz(const C& c) { return c.size(); }
template<class T> bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; } return false; }
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } return false; }

constexpr int eps = 1e-9;
constexpr int inf = 1e9;
constexpr ll linf = 1e18;

/// ============================================================================

constexpr int maxN = 500 + 5;
constexpr int maxS = 5000 + 5;
constexpr const char* dirC = "NESW";
constexpr int dx[4] = {-1, 0, 1, 0};
constexpr int dy[4] = {0, 1, 0, -1};

struct State {
    int t, x, y;
};

int n, m, ns;
char a[maxN][maxN];
char s[maxS];

queue<State> q;
vector<vector<vector<bool>>> vis;
int ans;

vector<int8_t> getDir(char c) {
    switch (c) {
        case '?': return {0, 1, 2, 3};
        case 'N': return {0};
        case 'E': return {1};
        case 'S': return {2};
        case 'W': return {3};
        default: assert(false);
    }
}

bool inside(int x, int y) {
    return (1 <= x && x <= n) && (1 <= y && y <= m);
}

void Bfs() {
    while (isz(q)) {
        int t = q.front().t;
        int x = q.front().x;
        int y = q.front().y;
        q.pop();

        if (t == ns) continue;

        for (int8_t i : getDir(s[t + 1])) {
            int nx = x + dx[i];
            int ny = y + dy[i];

            if (!inside(nx, ny) || a[nx][ny] == '#') {
                continue;
            }

            if (!vis[t + 1][nx][ny]) {
                vis[t + 1][nx][ny] = true;
                q.push({t + 1, nx, ny});
            }
        }
    }
}

signed main() {
    cin >> n >> m >> ns;
    For (i, 1, n) cin >> (a[i] + 1);
    cin >> (s + 1);

    vis.assign(ns + 1, vector<vector<bool>>(n + 1, vector<bool>(m + 1)));

    For (i, 1, n) {
        For (j, 1, m) {
            if (a[i][j] == '.') {
                q.push({0, i, j});
                vis[0][i][j] = true;
            }
        }
    }

    Bfs();

    For (i, 1, n) {
        For (j, 1, m) {
            ans += vis[ns][i][j];
        }
    }

    cout << ans << '\n';
}

/**
    dp[t][x][y] = 0/1
    5000 * 500 * 500 => too much
**/

Compilation message

nautilus.cpp: In constructor '__Init__::__Init__()':
nautilus.cpp:11:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |             freopen(Task".inp", "r", stdin);
      |             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
nautilus.cpp:12:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |             freopen(Task".out", "w", stdout); }
      |             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 1360 KB Output is correct
2 Correct 4 ms 1100 KB Output is correct
3 Correct 3 ms 1100 KB Output is correct
4 Correct 3 ms 1100 KB Output is correct
5 Correct 3 ms 1112 KB Output is correct
6 Correct 2 ms 1100 KB Output is correct

Subtask #2
37.0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 1360 KB Output is correct
2 Correct 4 ms 1100 KB Output is correct
3 Correct 3 ms 1100 KB Output is correct
4 Correct 3 ms 1100 KB Output is correct
5 Correct 3 ms 1112 KB Output is correct
6 Correct 2 ms 1100 KB Output is correct
7 Correct 39 ms 1228 KB Output is correct
8 Correct 11 ms 1104 KB Output is correct
9 Correct 4 ms 1104 KB Output is correct
10 Correct 3 ms 1108 KB Output is correct
11 Correct 2 ms 1096 KB Output is correct
12 Correct 40 ms 1232 KB Output is correct
13 Correct 39 ms 1204 KB Output is correct
14 Correct 31 ms 1196 KB Output is correct
15 Correct 4 ms 1104 KB Output is correct
16 Correct 3 ms 1104 KB Output is correct
17 Correct 44 ms 1240 KB Output is correct
18 Correct 47 ms 1204 KB Output is correct
19 Correct 25 ms 1104 KB Output is correct
20 Correct 9 ms 1104 KB Output is correct
21 Correct 2 ms 1112 KB Output is correct

Subtask #3
0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 1360 KB Output is correct
2 Correct 4 ms 1100 KB Output is correct
3 Correct 3 ms 1100 KB Output is correct
4 Correct 3 ms 1100 KB Output is correct
5 Correct 3 ms 1112 KB Output is correct
6 Correct 2 ms 1100 KB Output is correct
7 Correct 39 ms 1228 KB Output is correct
8 Correct 11 ms 1104 KB Output is correct
9 Correct 4 ms 1104 KB Output is correct
10 Correct 3 ms 1108 KB Output is correct
11 Correct 2 ms 1096 KB Output is correct
12 Correct 40 ms 1232 KB Output is correct
13 Correct 39 ms 1204 KB Output is correct
14 Correct 31 ms 1196 KB Output is correct
15 Correct 4 ms 1104 KB Output is correct
16 Correct 3 ms 1104 KB Output is correct
17 Correct 44 ms 1240 KB Output is correct
18 Correct 47 ms 1204 KB Output is correct
19 Correct 25 ms 1104 KB Output is correct
20 Correct 9 ms 1104 KB Output is correct
21 Correct 2 ms 1112 KB Output is correct
22 Runtime error 502 ms 262148 KB Execution killed with signal 9
23 Halted 0 ms 0 KB -