oj.uz

Submission #758176

# Submission time Handle Problem Language Result Execution time Memory
758176 2023-06-14T08:42:32 Z SanguineChameleon Mecho (IOI09_mecho) C++17
100 / 100
 168 ms 7008 KB 
#include <bits/stdc++.h>
using namespace std;

void just_do_it();

int main() {
	#ifdef KAMIRULEZ
		freopen("kamirulez.inp", "r", stdin);
		freopen("kamirulez.out", "w", stdout);
	#endif
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	just_do_it();
	return 0;
}

const int maxn = 8e2 + 20;
const int dx[4] = {-1, 1, 0, 0};
const int dy[4] = {0, 0, -1, 1};
bool grass[maxn][maxn];
int dist_h[maxn][maxn];
int dist_m[maxn][maxn];
int n, k, sx, sy, ex, ey;

bool check() {
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			if (i != sx || j != sy) {
				dist_m[i][j] = -1;
			}
		}
	}
	deque<pair<int, int>> q;
	q.emplace_back(sx, sy);
	while (!q.empty()) {
		int cx = q.front().first;
		int cy = q.front().second;
		q.pop_front();
		for (int d = 0; d < 4; d++) {
			int nx = cx + dx[d];
			int ny = cy + dy[d];
			if (nx == ex && ny == ey) {
				return true;
			}
			if (dist_m[nx][ny] == -1 && dist_m[cx][cy] + 1 < dist_h[nx][ny] * k) {
				dist_m[nx][ny] = dist_m[cx][cy] + 1;
				q.emplace_back(nx, ny);
			}
		}
	}
	return false;
}

void just_do_it() {
	cin >> n >> k;
	deque<pair<int, int>> q;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			char c;
			cin >> c;
			if (c == 'G') {
				grass[i][j] = true;
			}
			if (c == 'M') {
				grass[i][j] = true;
				sx = i;
				sy = j;
			}
			if (c == 'D') {
				ex = i;
				ey = j;
			}
			if (c == 'H') {
				dist_h[i][j] = 0;
				q.emplace_back(i, j);
			}
			else {
				dist_h[i][j] = -1;
			}
		}
	}
	while (!q.empty()) {
		int cx = q.front().first;
		int cy = q.front().second;
		q.pop_front();
		for (int d = 0; d < 4; d++) {
			int nx = cx + dx[d];
			int ny = cy + dy[d];
			if (grass[nx][ny] && dist_h[nx][ny] == -1) {
				dist_h[nx][ny] = dist_h[cx][cy] + 1;
				q.emplace_back(nx, ny);
			}
		}
	}
	int res = -1;
	int lt = 0;
	int rt = dist_h[sx][sy] - 1;
	while (lt <= rt) {
		int mt = (lt + rt) / 2;
		dist_m[sx][sy] = mt * k;
		if (check()) {
			res = mt;
			lt = mt + 1;
		}
		else {
			rt = mt - 1;
		}
	}
	cout << res;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 82 ms 6844 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 588 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 716 KB Output is correct
26 Correct 1 ms 724 KB Output is correct
27 Correct 1 ms 724 KB Output is correct
28 Correct 1 ms 720 KB Output is correct
29 Correct 1 ms 852 KB Output is correct
30 Correct 1 ms 852 KB Output is correct
31 Correct 1 ms 852 KB Output is correct
32 Correct 1 ms 852 KB Output is correct
33 Correct 9 ms 2900 KB Output is correct
34 Correct 6 ms 2980 KB Output is correct
35 Correct 16 ms 2900 KB Output is correct
36 Correct 7 ms 3284 KB Output is correct
37 Correct 9 ms 3284 KB Output is correct
38 Correct 21 ms 3340 KB Output is correct
39 Correct 9 ms 3676 KB Output is correct
40 Correct 10 ms 3668 KB Output is correct
41 Correct 26 ms 3664 KB Output is correct
42 Correct 12 ms 4180 KB Output is correct
43 Correct 11 ms 4180 KB Output is correct
44 Correct 32 ms 4180 KB Output is correct
45 Correct 12 ms 4556 KB Output is correct
46 Correct 12 ms 4564 KB Output is correct
47 Correct 39 ms 4484 KB Output is correct
48 Correct 16 ms 4936 KB Output is correct
49 Correct 15 ms 5000 KB Output is correct
50 Correct 52 ms 5032 KB Output is correct
51 Correct 18 ms 5372 KB Output is correct
52 Correct 18 ms 5372 KB Output is correct
53 Correct 58 ms 5336 KB Output is correct
54 Correct 19 ms 5844 KB Output is correct
55 Correct 22 ms 5812 KB Output is correct
56 Correct 73 ms 5860 KB Output is correct
57 Correct 24 ms 6252 KB Output is correct
58 Correct 23 ms 6228 KB Output is correct
59 Correct 77 ms 6300 KB Output is correct
60 Correct 26 ms 6656 KB Output is correct
61 Correct 26 ms 6596 KB Output is correct
62 Correct 101 ms 6740 KB Output is correct
63 Correct 107 ms 6728 KB Output is correct
64 Correct 168 ms 6724 KB Output is correct
65 Correct 153 ms 6736 KB Output is correct
66 Correct 117 ms 6608 KB Output is correct
67 Correct 129 ms 6604 KB Output is correct
68 Correct 51 ms 6756 KB Output is correct
69 Correct 46 ms 6744 KB Output is correct
70 Correct 48 ms 6744 KB Output is correct
71 Correct 42 ms 6688 KB Output is correct
72 Correct 39 ms 6644 KB Output is correct
73 Correct 35 ms 6920 KB Output is correct
74 Correct 54 ms 6988 KB Output is correct
75 Correct 50 ms 7000 KB Output is correct
76 Correct 55 ms 7008 KB Output is correct
77 Correct 63 ms 6944 KB Output is correct
78 Correct 59 ms 6972 KB Output is correct
79 Correct 48 ms 6972 KB Output is correct
80 Correct 59 ms 6868 KB Output is correct
81 Correct 56 ms 6940 KB Output is correct
82 Correct 52 ms 6868 KB Output is correct
83 Correct 64 ms 6952 KB Output is correct
84 Correct 55 ms 6900 KB Output is correct
85 Correct 58 ms 6808 KB Output is correct
86 Correct 61 ms 6864 KB Output is correct
87 Correct 64 ms 6924 KB Output is correct
88 Correct 70 ms 6884 KB Output is correct
89 Correct 62 ms 6884 KB Output is correct
90 Correct 77 ms 6880 KB Output is correct
91 Correct 67 ms 6872 KB Output is correct
92 Correct 84 ms 6872 KB Output is correct