제출 #549669

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
549669		Danilo21	Awesome Arrowland Adventure (eJOI19_adventure)	C++14	100 / 100	85 ms	7868 KiB

adventure

#include <bits/stdc++.h>

#define ll long long
#define ld long double
#define pb push_back
#define fi first
#define se second
#define en '\n'
#define sp ' '
#define tb '\t'
#define ri(n) int n; cin >> n
#define rl(n) ll n; cin >> n
#define rs(s) string s; cin >> s
#define rc(c) char c; cin >> c
#define rv(v) for (auto &x : v) cin >> x
#define pven(v) for (auto x : v) cout << x << en
#define pv(v) for (auto x : v) cout << x << sp; cout << en
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define yes cout << "YES" << en
#define no cout << "NO" << en
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
#define ssort(a, b) if (a < b) swap(a, b)
#define bitcnt(a) __builtin_popcountll(a)
#define bithigh(a) 63-__builtin_clzll(a)
#define lg bithigh
ll highpow(ll a) { return 1LL << (ll)lg(a); }

using namespace std;

const ll LINF = 4e18;
const int mxN = 5e2+10, INF = 2e9, mod = (1 ? 1e9+7 : 998244353);
ll n, m, a[mxN][mxN], dist[mxN][mxN];
bool vis[mxN][mxN];
int dx[4] = {-1, 0, 1, 0}, dy[4] = {0, 1, 0, -1};

bool Valid(int i, int j){ return i >= 0 && i < n && j >= 0 && j < m; }

void Solve(){

    cin >> n >> m;
    for (int i = 0; i < n; i++){
        rs(s);
        for (int j = 0; j < m; j++){
            if (s[j]=='X') a[i][j] = 0;
            if (s[j]=='N') a[i][j] = 1;
            if (s[j]=='E') a[i][j] = 2;
            if (s[j]=='S') a[i][j] = 3;
            if (s[j]=='W') a[i][j] = 4;
        }
    }
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            dist[i][j] = INF;
    priority_queue<array<int, 3>,
            vector<array<int, 3> >,
            greater<array<int, 3> > > pq;
    dist[0][0] = 0;
    pq.push({0, 0 ,0});
    while (pq.size()){
        auto [d, i, j] = pq.top(); pq.pop();
        if (vis[i][j]) continue;
        vis[i][j] = 1;
        if (!a[i][j]) continue;
        for (int t = 0; t < 4; t++){
            int x = (a[i][j] + t - 1) % 4;
            int _i = i + dx[x], _j = j + dy[x];
            if (Valid(_i, _j) && dist[i][j] + t < dist[_i][_j]){
                dist[_i][_j] = dist[i][j] + t;
                pq.push({dist[_i][_j], _i, _j});
            }
        }
    }
    cout << (dist[n-1][m-1]^INF ? dist[n-1][m-1] : -1) << en;
}

int main(){

    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0); cerr.tie(0);
    cout << setprecision(12) << fixed;
    cerr << setprecision(12) << fixed;
    cerr << "Started!" << endl;

    int t = 1;
    //cin >> t;
    while (t--)
        Solve();

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

adventure.cpp: In function 'long long int highpow(long long int)':
adventure.cpp:26:22: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   26 | #define bithigh(a) 63-__builtin_clzll(a)
      |                      ^
adventure.cpp:27:12: note: in expansion of macro 'bithigh'
   27 | #define lg bithigh
      |            ^~~~~~~
adventure.cpp:28:38: note: in expansion of macro 'lg'
   28 | ll highpow(ll a) { return 1LL << (ll)lg(a); }
      |                                      ^~
adventure.cpp: In function 'void Solve()':
adventure.cpp:62:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   62 |         auto [d, i, j] = pq.top(); pq.pop();
      |              ^
adventure.cpp:71:37: warning: narrowing conversion of 'dist[_i][_j]' from 'long long int' to 'int' [-Wnarrowing]
   71 |                 pq.push({dist[_i][_j], _i, _j});
      |                          ~~~~~~~~~~~^

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