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답안 #257367

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
257367 2020-08-04T07:19:39 Z 임성재(#5052) Dangerous Skating (JOI16_skating) C++17
100 / 100
 1959 ms 21484 KB 
#include<bits/stdc++.h>
using namespace std;

#define fast ios::sync_with_stdio(false); cin.tie(NULL)
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define em emplace
#define all(v) (v).begin(), (v).end()
#define pre(a) cout<<fixed; cout.precision(a)
#define mp make_pair

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<int,pii> pipii;
const int inf = 1e9;
const ll INF = 1e18;

int n, m;
string s[1010];
pii S;
pii E;
int l[1010][1010];
int r[1010][1010];
int L[1010][1010];
int R[1010][1010];
bool chk[1010][1010];
priority_queue<pipii, vector<pipii>, greater<pipii>> pQ;

int main() {
	fast;

	fast;

	cin >> n >> m;

	for(int i=0; i<n; i++) {
		cin >> s[i];
	}

	cin >> S.fi >> S.se;
	cin >> E.fi >> E.se;

	S.fi--;
	S.se--;
	E.fi--;
	E.se--;

	for(int i=0; i<n; i++) {
		for(int j=1; j<m; j++) {
			l[i][j] = j;
			if(s[i][j] == '.' && s[i][j-1] == '.') l[i][j] = l[i][j-1];
		}

		for(int j=m-1; j>=0; j--) {
			r[i][j] = j;
			if(j < m-1 && s[i][j] == '.' && s[i][j+1] == '.') r[i][j] = r[i][j+1];
		}
	}
	
	for(int i=0; i<m; i++) {
		for(int j=1; j<n; j++) {
			L[j][i] = j;
			if(s[j][i] == '.' && s[j-1][i] == '.') L[j][i] = L[j-1][i];
		}

		for(int j=n-1; j>=0; j--) {
			R[j][i] = j;
			if(j < n-1 && s[j][i] == '.' && s[j+1][i] == '.') R[j][i] = R[j+1][i];
		}
	}

	pQ.em(0, S);

	while(pQ.size()) {
		int cost = pQ.top().fi;
		pii cur = pQ.top().se;

		pQ.pop();

		if(cur == E) {
			cout << cost;
			return 0;
		}
		if(chk[cur.fi][cur.se]) continue;

		//cout << cur.fi << " " << cur.se << " : " << cost << endl;

		chk[cur.fi][cur.se] = true;

		pQ.em(cost + 1, mp(cur.fi, l[cur.fi][cur.se]));
		pQ.em(cost + 1, mp(cur.fi, r[cur.fi][cur.se]));
		pQ.em(cost + 1, mp(L[cur.fi][cur.se], cur.se));
		pQ.em(cost + 1, mp(R[cur.fi][cur.se], cur.se));
		if(cur.se < m-1 && s[cur.fi][cur.se+1] == '.') pQ.em(cost + 2, mp(cur.fi, cur.se+1));
		if(cur.se > 0 && s[cur.fi][cur.se-1] == '.') pQ.em(cost + 2, mp(cur.fi, cur.se-1));
		if(cur.fi < n-1 && s[cur.fi+1][cur.se] == '.') pQ.em(cost + 2, mp(cur.fi+1, cur.se));
		if(cur.fi > 0 && s[cur.fi-1][cur.se] == '.') pQ.em(cost + 2, mp(cur.fi-1, cur.se));
	}

	cout << "-1";
}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 0 ms 512 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 0 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 0 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 0 ms 512 KB Output is correct
10 Correct 0 ms 512 KB Output is correct

Subtask #2
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 0 ms 512 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 0 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 0 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 0 ms 512 KB Output is correct
10 Correct 0 ms 512 KB Output is correct
11 Correct 32 ms 3968 KB Output is correct
12 Correct 41 ms 4288 KB Output is correct
13 Correct 17 ms 4732 KB Output is correct
14 Correct 24 ms 4028 KB Output is correct
15 Correct 3 ms 3584 KB Output is correct
16 Correct 61 ms 4732 KB Output is correct
17 Correct 35 ms 3840 KB Output is correct
18 Correct 24 ms 3840 KB Output is correct
19 Correct 40 ms 4096 KB Output is correct
20 Correct 15 ms 3584 KB Output is correct
21 Correct 8 ms 3712 KB Output is correct
22 Correct 5 ms 3712 KB Output is correct
23 Correct 32 ms 3960 KB Output is correct
24 Correct 49 ms 3960 KB Output is correct
25 Correct 17 ms 3840 KB Output is correct
26 Correct 25 ms 3840 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 0 ms 512 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 0 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 0 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 0 ms 512 KB Output is correct
10 Correct 0 ms 512 KB Output is correct
11 Correct 32 ms 3968 KB Output is correct
12 Correct 41 ms 4288 KB Output is correct
13 Correct 17 ms 4732 KB Output is correct
14 Correct 24 ms 4028 KB Output is correct
15 Correct 3 ms 3584 KB Output is correct
16 Correct 61 ms 4732 KB Output is correct
17 Correct 35 ms 3840 KB Output is correct
18 Correct 24 ms 3840 KB Output is correct
19 Correct 40 ms 4096 KB Output is correct
20 Correct 15 ms 3584 KB Output is correct
21 Correct 8 ms 3712 KB Output is correct
22 Correct 5 ms 3712 KB Output is correct
23 Correct 32 ms 3960 KB Output is correct
24 Correct 49 ms 3960 KB Output is correct
25 Correct 17 ms 3840 KB Output is correct
26 Correct 25 ms 3840 KB Output is correct
27 Correct 986 ms 19952 KB Output is correct
28 Correct 1906 ms 21480 KB Output is correct
29 Correct 45 ms 18548 KB Output is correct
30 Correct 597 ms 21000 KB Output is correct
31 Correct 49 ms 17280 KB Output is correct
32 Correct 1422 ms 18624 KB Output is correct
33 Correct 155 ms 9208 KB Output is correct
34 Correct 433 ms 18232 KB Output is correct
35 Correct 1204 ms 19144 KB Output is correct
36 Correct 976 ms 18932 KB Output is correct
37 Correct 238 ms 18168 KB Output is correct
38 Correct 1959 ms 21484 KB Output is correct
39 Correct 190 ms 18296 KB Output is correct
40 Correct 120 ms 18168 KB Output is correct