제출 #976666

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
976666		vjudge1	Awesome Arrowland Adventure (eJOI19_adventure)	C++17	100 / 100	62 ms	6420 KiB

adventure

#include <bits/stdc++.h>
#define pii pair<int, int>
#define ppii pair<int, pair<int, int>>
#define fr first
#define sc second

using namespace std;

int main() {
    int ax[4] = {-1, 0, 1, 0};
    int ay[4] = {0, 1, 0, -1};
    char cod[4] = {'N', 'E', 'S', 'W'};
    int n, m; cin >> n >> m;
    string s[n];
    for (int i=0;i<n;i++) {
        cin >> s[i];
    }
    int dp[n][m];
    memset(dp, -1, sizeof(dp));
    priority_queue<ppii, vector<ppii>, greater<ppii>>pq;
    pq.push({0, {0, 0}});
    while (!pq.empty()) {
        int nilai = pq.top().fr;
        int x = pq.top().sc.fr;
        int y = pq.top().sc.sc;
        pq.pop();
        if (x==n-1 && y==m-1) {
            cout << nilai << endl;
            return 0;
        }
        if (dp[x][y] == -1) {
            dp[x][y] = nilai;
            if (s[x][y] == 'X') continue;
            for (int i=0;i<4;i++) {
                if (x+ax[i]>=0&&x+ax[i]<n&&y+ay[i]>=0&&y+ay[i]<m && dp[x+ax[i]][y+ay[i]]==-1) {
                    int jarak = 0, j;
                    for (int ii=0;ii<4;ii++) {
                        if (cod[ii]==s[x][y]){
                            j=ii; break;
                        }
                    }
                    while (cod[j]!=cod[i]) {
                        jarak++;
                        j++; j%=4;
                    }
                    pq.push({nilai+jarak, {x+ax[i], y+ay[i]}});
                }
            }
        }
    }
    cout << dp[n-1][m-1] << endl;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

adventure.cpp: In function 'int main()':
adventure.cpp:44:26: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   44 |                         j++; j%=4;
      |                         ~^~

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