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답안 #257331

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
257331 2020-08-04T06:18:36 Z 임성재(#5052) Dangerous Skating (JOI16_skating) C++17
78 / 100
 3000 ms 57596 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];
priority_queue<pipii, vector<pipii>, greater<pipii>> pQ;
pii S;
pii E;
bool chk[1010][1010];
bool chk1[1010][1010];
bool chk2[1010][1010];
int dis[1010][1010];

int main() {
	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=0; j<m; j++) {
			dis[i][j] = inf;
		}
	}

	pQ.em(0, S);

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

		pQ.pop();

		if(cur == E) {
			cout << cost << "\n";
			return 0;
		}
		if(chk[cur.fi][cur.se]) continue;
		chk[cur.fi][cur.se] = true;
		
		if(1 || !chk1[cur.fi][cur.se]) {
			int l, r;
			for(l = cur.fi; 0 <= l && s[l][cur.se] == '.'; l--);
			for(r = cur.fi; r < n && s[r][cur.se] == '.'; r++);

			l++;
			r--;

			for(int i=l; i<=r; i++) {
				chk1[i][cur.se] = true;
				if(i < cur.fi) {
					int d = min(2 * i - 2 * l + 1, 2 * cur.fi - 2 * i);

					if(cost + d >= dis[i][cur.se]) continue;
					dis[i][cur.se] = cost + d;
					pQ.em(cost + d, mp(i, cur.se));
				}
				else if(i > cur.fi) {
					int d = min(2 * r - 2 * i + 1, 2 * i - 2 * cur.fi);				
					
					if(cost + d >= dis[i][cur.se]) continue;
					dis[i][cur.se] = cost + d;
					pQ.em(cost + d, mp(i, cur.se));
				}
			}
		}

		if(1 || !chk2[cur.fi][cur.se]) {
			int l, r;
			for(l = cur.se; 0 <= l && s[cur.fi][l] == '.'; l--);
			for(r = cur.se; r < m && s[cur.fi][r] == '.'; r++);

			l++;
			r--;

			for(int i=l; i<=r; i++) {
				chk2[cur.fi][i] = true;
				if(i < cur.se) {
					int d = min(2 * i - 2 * l + 1, 2 * cur.se - 2 * i);

					if(cost + d >= dis[cur.fi][i]) continue;
					dis[cur.fi][i] = cost + d;
					pQ.em(cost + d, mp(cur.fi, i));
				}
				else if(i > cur.se) {
					int d = min(2 * r - 2 * i + 1, 2 * i - 2 * cur.se);				
					
					if(cost + d >= dis[cur.fi][i]) continue;
					dis[cur.fi][i] = cost + d;
					pQ.em(cost + d, mp(cur.fi, i));
				}
			}
		}

		

	}

	cout << "-1\n";
}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct

Subtask #2
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 35 ms 2556 KB Output is correct
12 Correct 39 ms 3448 KB Output is correct
13 Correct 13 ms 3448 KB Output is correct
14 Correct 8 ms 1792 KB Output is correct
15 Correct 1 ms 1280 KB Output is correct
16 Correct 27 ms 2684 KB Output is correct
17 Correct 17 ms 1792 KB Output is correct
18 Correct 7 ms 1792 KB Output is correct
19 Correct 14 ms 1920 KB Output is correct
20 Correct 17 ms 2044 KB Output is correct
21 Correct 2 ms 1792 KB Output is correct
22 Correct 7 ms 1792 KB Output is correct
23 Correct 9 ms 1792 KB Output is correct
24 Correct 24 ms 2180 KB Output is correct
25 Correct 5 ms 1792 KB Output is correct
26 Correct 7 ms 1792 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 35 ms 2556 KB Output is correct
12 Correct 39 ms 3448 KB Output is correct
13 Correct 13 ms 3448 KB Output is correct
14 Correct 8 ms 1792 KB Output is correct
15 Correct 1 ms 1280 KB Output is correct
16 Correct 27 ms 2684 KB Output is correct
17 Correct 17 ms 1792 KB Output is correct
18 Correct 7 ms 1792 KB Output is correct
19 Correct 14 ms 1920 KB Output is correct
20 Correct 17 ms 2044 KB Output is correct
21 Correct 2 ms 1792 KB Output is correct
22 Correct 7 ms 1792 KB Output is correct
23 Correct 9 ms 1792 KB Output is correct
24 Correct 24 ms 2180 KB Output is correct
25 Correct 5 ms 1792 KB Output is correct
26 Correct 7 ms 1792 KB Output is correct
27 Execution timed out 3095 ms 57596 KB Time limit exceeded
28 Halted 0 ms 0 KB -