oj.uz

Submission #234104

# Submission time Handle Problem Language Result Execution time Memory
234104 2020-05-23T06:15:17 Z ruler Portals (BOI14_portals) C++14
100 / 100
 432 ms 46972 KB 
// IOI 2021
#include <bits/stdc++.h>
using namespace std;

#define endl '\n'
#define ends ' '
#define die(x) return cout << x << endl, 0
#define all(v) v.begin(), v.end()
#define sz(x) (int)(x.size())
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) { cerr << ends << H; debug_out(T...); }
#define debug(...) cerr << "{" << #__VA_ARGS__ << "}:", debug_out(__VA_ARGS__)
typedef long long ll;
typedef pair<int, int> pii;
const ll INF = 1e18;
const ll MOD = 1e9 + 7;
 
////////////////////////////////////////////////////////////////////

const int N = 1e3 + 2;

bool A[N][N];
int W[N][N], D[N][N];
pii X[4][N][N];
int DX[] = {+1, -1, 0, 0};
int DY[] = {0, 0, +1, -1};

int main() {

	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	mt19937 Rnd(time(0));
	
	memset(W, 63, sizeof W), memset(D, 63, sizeof D);

	int n, m; cin >> n >> m;
	pii src, dest;
	for (int i = 1; i <= n; i++) for (int j = 1; j <= m; j++) {
		char c; cin >> c;
		A[i][j] = (c != '#');
		if (c == 'S') src = make_pair(i, j);
		if (c == 'C') dest = make_pair(i, j);
	}
	for (int i = 1; i <= n; i++) for (int j = 1; j <= m; j++) if (A[i][j]) {
		X[0][i][j] = (A[i][j - 1] ? X[0][i][j - 1] : make_pair(i, j));
		X[1][i][j] = (A[i - 1][j] ? X[1][i - 1][j] : make_pair(i, j));
	}
	for (int i = n; i >= 1; i--) for (int j = m; j >= 1; j--) if (A[i][j]) {
		X[2][i][j] = (A[i][j + 1] ? X[2][i][j + 1] : make_pair(i, j));
		X[3][i][j] = (A[i + 1][j] ? X[3][i + 1][j] : make_pair(i, j));
	}
	queue<pii> Q;
	for (int i = 1; i <= n; i++) for (int j = 1; j <= m; j++) if (A[i][j] && !(A[i - 1][j] && A[i + 1][j] && A[i][j - 1] && A[i][j + 1])) W[i][j] = 0, Q.push(make_pair(i, j));
	while (!Q.empty()) {
		pii p = Q.front(); Q.pop();
		for (int i = 0; i < 4; i++) {
			pii q = make_pair(p.first + DX[i], p.second + DY[i]);
			if (A[q.first][q.second] && W[p.first][p.second] + 1 < W[q.first][q.second]) 
				W[q.first][q.second] = W[p.first][p.second] + 1, Q.push(q); 
		}
	}
	set< pair<int, pii> > S;
	D[src.first][src.second] = 0;
	S.insert(make_pair(0, src));
	while (!S.empty()) {
		pii p = S.begin()->second; S.erase(S.begin());
		for (int i = 0; i < 4; i++) {
			pii q = make_pair(p.first + DX[i], p.second + DY[i]);
			if (A[q.first][q.second] && D[p.first][p.second] + 1 < D[q.first][q.second]) 
				S.erase(make_pair(D[q.first][q.second], q)), D[q.first][q.second] = D[p.first][p.second] + 1, S.insert(make_pair(D[q.first][q.second], q)); 
			q = X[i][p.first][p.second];
			if (A[q.first][q.second] && D[p.first][p.second] + W[p.first][p.second] + 1 < D[q.first][q.second]) 
				S.erase(make_pair(D[q.first][q.second], q)), D[q.first][q.second] = D[p.first][p.second] + W[p.first][p.second] + 1, S.insert(make_pair(D[q.first][q.second], q));
		}
	}
	cout << D[dest.first][dest.second] << endl;

	return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8192 KB Output is correct
2 Correct 8 ms 8320 KB Output is correct
3 Correct 9 ms 8448 KB Output is correct
4 Correct 9 ms 8320 KB Output is correct
5 Correct 9 ms 8320 KB Output is correct
6 Correct 9 ms 8448 KB Output is correct
7 Correct 8 ms 8320 KB Output is correct
8 Correct 9 ms 8448 KB Output is correct
9 Correct 8 ms 8320 KB Output is correct
10 Correct 8 ms 8320 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8192 KB Output is correct
2 Correct 9 ms 8448 KB Output is correct
3 Correct 9 ms 8448 KB Output is correct
4 Correct 8 ms 8320 KB Output is correct
5 Correct 8 ms 8320 KB Output is correct
6 Correct 9 ms 8448 KB Output is correct
7 Correct 8 ms 8320 KB Output is correct
8 Correct 9 ms 8448 KB Output is correct
9 Correct 10 ms 9216 KB Output is correct
10 Correct 10 ms 9216 KB Output is correct
11 Correct 9 ms 9088 KB Output is correct
12 Correct 9 ms 9088 KB Output is correct
13 Correct 10 ms 9088 KB Output is correct
14 Correct 9 ms 8320 KB Output is correct
15 Correct 9 ms 9088 KB Output is correct
16 Correct 9 ms 8320 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8192 KB Output is correct
2 Correct 10 ms 8448 KB Output is correct
3 Correct 9 ms 8320 KB Output is correct
4 Correct 9 ms 8320 KB Output is correct
5 Correct 17 ms 13056 KB Output is correct
6 Correct 19 ms 13056 KB Output is correct
7 Correct 19 ms 13056 KB Output is correct
8 Correct 14 ms 13088 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8192 KB Output is correct
2 Correct 8 ms 8320 KB Output is correct
3 Correct 10 ms 8448 KB Output is correct
4 Correct 9 ms 8320 KB Output is correct
5 Correct 8 ms 8320 KB Output is correct
6 Correct 9 ms 8320 KB Output is correct
7 Correct 9 ms 8320 KB Output is correct
8 Correct 8 ms 8320 KB Output is correct
9 Correct 10 ms 9216 KB Output is correct
10 Correct 10 ms 9088 KB Output is correct
11 Correct 10 ms 9216 KB Output is correct
12 Correct 9 ms 9088 KB Output is correct
13 Correct 9 ms 9216 KB Output is correct
14 Correct 17 ms 13056 KB Output is correct
15 Correct 19 ms 13056 KB Output is correct
16 Correct 19 ms 13056 KB Output is correct
17 Correct 19 ms 13056 KB Output is correct
18 Correct 22 ms 13184 KB Output is correct
19 Correct 21 ms 12928 KB Output is correct
20 Correct 21 ms 12928 KB Output is correct
21 Correct 17 ms 13056 KB Output is correct
22 Correct 18 ms 13056 KB Output is correct
23 Correct 19 ms 13056 KB Output is correct
24 Correct 20 ms 12928 KB Output is correct
25 Correct 9 ms 8448 KB Output is correct
26 Correct 9 ms 9088 KB Output is correct
27 Correct 8 ms 8320 KB Output is correct
28 Correct 15 ms 13056 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8192 KB Output is correct
2 Correct 9 ms 8448 KB Output is correct
3 Correct 10 ms 8448 KB Output is correct
4 Correct 9 ms 8320 KB Output is correct
5 Correct 8 ms 8448 KB Output is correct
6 Correct 9 ms 8448 KB Output is correct
7 Correct 8 ms 8320 KB Output is correct
8 Correct 9 ms 8448 KB Output is correct
9 Correct 10 ms 9216 KB Output is correct
10 Correct 9 ms 9216 KB Output is correct
11 Correct 9 ms 9088 KB Output is correct
12 Correct 9 ms 9088 KB Output is correct
13 Correct 9 ms 9088 KB Output is correct
14 Correct 17 ms 13056 KB Output is correct
15 Correct 18 ms 13056 KB Output is correct
16 Correct 20 ms 13056 KB Output is correct
17 Correct 19 ms 13056 KB Output is correct
18 Correct 22 ms 13056 KB Output is correct
19 Correct 21 ms 12928 KB Output is correct
20 Correct 22 ms 12928 KB Output is correct
21 Correct 18 ms 13056 KB Output is correct
22 Correct 20 ms 13056 KB Output is correct
23 Correct 20 ms 13056 KB Output is correct
24 Correct 268 ms 45560 KB Output is correct
25 Correct 432 ms 42360 KB Output is correct
26 Correct 317 ms 41848 KB Output is correct
27 Correct 336 ms 41848 KB Output is correct
28 Correct 186 ms 46200 KB Output is correct
29 Correct 219 ms 46328 KB Output is correct
30 Correct 255 ms 46456 KB Output is correct
31 Correct 20 ms 12928 KB Output is correct
32 Correct 310 ms 41720 KB Output is correct
33 Correct 9 ms 8320 KB Output is correct
34 Correct 9 ms 9088 KB Output is correct
35 Correct 246 ms 43644 KB Output is correct
36 Correct 9 ms 8320 KB Output is correct
37 Correct 15 ms 13056 KB Output is correct
38 Correct 128 ms 46972 KB Output is correct
39 Correct 161 ms 38008 KB Output is correct