| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 817567 |
2023-08-09T13:38:03 Z |
Asamai |
Mecho (IOI09_mecho) |
C++17 |
|
140 ms |
4436 KB |
#include <bits/stdc++.h>
using namespace std;
template<class A, class B> bool maximize(A& x, B y) {if (x < y) return x = y, true; else return false;}
template<class A, class B> bool minimize(A& x, B y) {if (x > y) return x = y, true; else return false;}
#define all(a) a.begin(), a.end()
#define pb push_back
#define pf push_front
#define fi first
#define se second
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ld;
typedef pair<db, db> pdb;
typedef pair<ld, ld> pld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ll, int> plli;
typedef pair<int, ll> pill;
const int MAX_N = 800 + 5;
const int dx[] = {0, 0, 1, -1};
const int dy[] = {1, -1, 0, 0};
int n, S;
string a[MAX_N];
pii s, t;
int dist[MAX_N][MAX_N];
bool ok[MAX_N][MAX_N];
bool inside(int x, int y) {
return x > 0 && x <= n && y > 0 && y <= n;
}
bool check(int mid) {
if (mid * S >= dist[s.fi][s.se]) return false;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
ok[i][j] = false;
}
}
queue<pair<pii, int>> q;
q.push({s, mid * S});
ok[s.fi][s.se] = true;
while (!q.empty()) {
int u = q.front().fi.fi;
int v = q.front().fi.se;
int time = q.front().se;
q.pop();
for (int k = 0; k < 4; k++) {
int x = u + dx[k];
int y = v + dy[k];
if (inside(x, y) && (a[x][y] == 'G' || a[x][y] == 'D') && !ok[x][y] && dist[x][y] > time + 1) {
ok[x][y] = true;
q.push({{x, y}, time + 1});
}
}
}
return ok[t.fi][t.se];
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
queue<pii> q;
cin >> n >> S;
for (int i = 1; i <= n; i++) {
cin >> a[i];
a[i] = ' ' + a[i];
for (int j = 1; j <= n; j++) {
if (a[i][j] == 'M') {
s = {i, j};
}
if (a[i][j] == 'D') {
t = {i, j};
}
if (a[i][j] == 'H') {
q.push({i, j});
dist[i][j] = 1;
}
}
}
while (!q.empty()) {
int u = q.front().fi;
int v = q.front().se;
q.pop();
for (int k = 0; k < 4; k++) {
int x = u + dx[k];
int y = v + dy[k];
if (inside(x, y) && (a[x][y] == 'G' || a[x][y] == 'M') && !dist[x][y]) {
dist[x][y] = dist[u][v] + 1;
q.push({x, y});
}
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
dist[i][j]--;
dist[i][j] *= S;
}
}
dist[t.fi][t.se] = 1e9;
int low = 0, high = n * n;
int ans = -1;
while (low <= high) {
int mid = (low + high) >> 1;
if (check(mid)) {
ans = mid;
low = mid + 1;
}
else {
high = mid - 1;
}
}
cout << ans;
return 0;
}
/*
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
340 KB |
Output is correct |
| 5 |
Correct |
0 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
60 ms |
4232 KB |
Output is correct |
| 8 |
Correct |
0 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
0 ms |
340 KB |
Output is correct |
| 11 |
Correct |
0 ms |
340 KB |
Output is correct |
| 12 |
Correct |
0 ms |
596 KB |
Output is correct |
| 13 |
Correct |
1 ms |
468 KB |
Output is correct |
| 14 |
Correct |
1 ms |
596 KB |
Output is correct |
| 15 |
Correct |
0 ms |
340 KB |
Output is correct |
| 16 |
Correct |
0 ms |
412 KB |
Output is correct |
| 17 |
Correct |
0 ms |
340 KB |
Output is correct |
| 18 |
Correct |
0 ms |
340 KB |
Output is correct |
| 19 |
Correct |
0 ms |
468 KB |
Output is correct |
| 20 |
Correct |
0 ms |
468 KB |
Output is correct |
| 21 |
Correct |
0 ms |
468 KB |
Output is correct |
| 22 |
Correct |
1 ms |
468 KB |
Output is correct |
| 23 |
Correct |
1 ms |
468 KB |
Output is correct |
| 24 |
Correct |
1 ms |
468 KB |
Output is correct |
| 25 |
Correct |
1 ms |
596 KB |
Output is correct |
| 26 |
Correct |
1 ms |
596 KB |
Output is correct |
| 27 |
Correct |
1 ms |
596 KB |
Output is correct |
| 28 |
Correct |
1 ms |
596 KB |
Output is correct |
| 29 |
Correct |
1 ms |
596 KB |
Output is correct |
| 30 |
Correct |
1 ms |
596 KB |
Output is correct |
| 31 |
Correct |
1 ms |
596 KB |
Output is correct |
| 32 |
Correct |
1 ms |
596 KB |
Output is correct |
| 33 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 34 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 35 |
Correct |
15 ms |
1888 KB |
Output is correct |
| 36 |
Correct |
4 ms |
2020 KB |
Output is correct |
| 37 |
Correct |
4 ms |
2004 KB |
Output is correct |
| 38 |
Correct |
19 ms |
2116 KB |
Output is correct |
| 39 |
Correct |
4 ms |
2260 KB |
Output is correct |
| 40 |
Correct |
5 ms |
2260 KB |
Output is correct |
| 41 |
Correct |
27 ms |
2260 KB |
Output is correct |
| 42 |
Correct |
5 ms |
2516 KB |
Output is correct |
| 43 |
Correct |
6 ms |
2580 KB |
Output is correct |
| 44 |
Correct |
36 ms |
2516 KB |
Output is correct |
| 45 |
Correct |
6 ms |
2844 KB |
Output is correct |
| 46 |
Correct |
7 ms |
2844 KB |
Output is correct |
| 47 |
Correct |
38 ms |
2772 KB |
Output is correct |
| 48 |
Correct |
10 ms |
3028 KB |
Output is correct |
| 49 |
Correct |
9 ms |
3116 KB |
Output is correct |
| 50 |
Correct |
55 ms |
3028 KB |
Output is correct |
| 51 |
Correct |
9 ms |
3284 KB |
Output is correct |
| 52 |
Correct |
9 ms |
3368 KB |
Output is correct |
| 53 |
Correct |
56 ms |
3380 KB |
Output is correct |
| 54 |
Correct |
9 ms |
3540 KB |
Output is correct |
| 55 |
Correct |
11 ms |
3632 KB |
Output is correct |
| 56 |
Correct |
66 ms |
3624 KB |
Output is correct |
| 57 |
Correct |
13 ms |
3796 KB |
Output is correct |
| 58 |
Correct |
13 ms |
3868 KB |
Output is correct |
| 59 |
Correct |
76 ms |
3896 KB |
Output is correct |
| 60 |
Correct |
14 ms |
4052 KB |
Output is correct |
| 61 |
Correct |
13 ms |
4172 KB |
Output is correct |
| 62 |
Correct |
88 ms |
4168 KB |
Output is correct |
| 63 |
Correct |
76 ms |
4168 KB |
Output is correct |
| 64 |
Correct |
140 ms |
4160 KB |
Output is correct |
| 65 |
Correct |
107 ms |
4052 KB |
Output is correct |
| 66 |
Correct |
91 ms |
4156 KB |
Output is correct |
| 67 |
Correct |
90 ms |
4152 KB |
Output is correct |
| 68 |
Correct |
32 ms |
4180 KB |
Output is correct |
| 69 |
Correct |
32 ms |
4196 KB |
Output is correct |
| 70 |
Correct |
23 ms |
4196 KB |
Output is correct |
| 71 |
Correct |
28 ms |
4180 KB |
Output is correct |
| 72 |
Correct |
19 ms |
4180 KB |
Output is correct |
| 73 |
Correct |
21 ms |
4408 KB |
Output is correct |
| 74 |
Correct |
39 ms |
4332 KB |
Output is correct |
| 75 |
Correct |
50 ms |
4436 KB |
Output is correct |
| 76 |
Correct |
43 ms |
4332 KB |
Output is correct |
| 77 |
Correct |
55 ms |
4424 KB |
Output is correct |
| 78 |
Correct |
53 ms |
4308 KB |
Output is correct |
| 79 |
Correct |
38 ms |
4416 KB |
Output is correct |
| 80 |
Correct |
43 ms |
4404 KB |
Output is correct |
| 81 |
Correct |
51 ms |
4408 KB |
Output is correct |
| 82 |
Correct |
41 ms |
4412 KB |
Output is correct |
| 83 |
Correct |
54 ms |
4372 KB |
Output is correct |
| 84 |
Correct |
52 ms |
4308 KB |
Output is correct |
| 85 |
Correct |
54 ms |
4360 KB |
Output is correct |
| 86 |
Correct |
57 ms |
4368 KB |
Output is correct |
| 87 |
Correct |
53 ms |
4364 KB |
Output is correct |
| 88 |
Correct |
71 ms |
4308 KB |
Output is correct |
| 89 |
Correct |
59 ms |
4312 KB |
Output is correct |
| 90 |
Correct |
59 ms |
4268 KB |
Output is correct |
| 91 |
Correct |
57 ms |
4312 KB |
Output is correct |
| 92 |
Correct |
62 ms |
4228 KB |
Output is correct |
