| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 575911 |
2022-06-11T16:19:37 Z |
acatmeowmeow |
Mecho (IOI09_mecho) |
C++11 |
|
1000 ms |
13192 KB |
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 8e2 + 5;
int n, s;
char grid[N][N];
pair<int, int> init, home;
vector<pair<int, int>> hive;
vector<int> dx = {-1, 0, 1, 0}, dy = {0, 1, 0, -1};
int dmecho[N][N], dbee[N][N];
bool vmecho[N][N], vbee[N][N];
queue<pair<int, int>> qmecho, qbee;
bool bee_inbound(int x, int y) {
return x >= 1 && x <= n && y >= 1 && y <= n && !vbee[x][y] && grid[x][y] == 'G';
}
bool mecho_inbound(int x, int y) {
return x >= 1 && x <= n && y >= 1 && y <= n && !vmecho[x][y] && (grid[x][y] == 'G' || grid[x][y] == 'D');
}
bool valid(int m) {
// initialize
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
dmecho[i][j] = dbee[i][j] = 1e18;
vmecho[i][j] = vbee[i][j] = false;
}
}
// mecho eats and bee move
for (auto&u : hive) {
int x = u.first, y = u.second;
dbee[x][y] = 0, qbee.push({x, y});
}
for (int i = 1; i <= n*n; i++) {
queue<pair<int, int>> nex;
while (qbee.size()) {
int x = qbee.front().first, y = qbee.front().second; qbee.pop();
for (int k = 0; k < 4; k++) {
int tox = x + dx[k], toy = y + dy[k];
if (!bee_inbound(tox, toy)) continue;
if (dbee[tox][toy] <= max(1ll, i - m + 1)) continue;
dbee[tox][toy] = max(1ll, i - m + 1), vbee[tox][toy] = true, nex.push({tox, toy});
}
}
swap(nex, qbee);
}
// debug
/*for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
cout << (dbee[i][j] == 1e18 ? -1 : dbee[i][j]) << ' ';
}
cout << '\n';
}*/
// debug
int x = init.first, y = init.second;
dmecho[x][y] = 0, vmecho[x][y] = true, qmecho.push({x, y});
for (int i = 1; i <= (n*n + s - 1)/s; i++) {
for (int j = 1; j <= s; j++) {
queue<pair<int, int>> nex;
while (qmecho.size()) {
int x = qmecho.front().first, y = qmecho.front().second; qmecho.pop();
if (dmecho[x][y] >= dbee[x][y]) continue;
for (int k = 0; k < 4; k++) {
int tox = x + dx[k], toy = y + dy[k];
if (!mecho_inbound(tox, toy)) continue;
if (dmecho[tox][toy] <= i) continue;
dmecho[tox][toy] = i, vmecho[tox][toy] = true, nex.push({tox, toy});
}
}
swap(nex, qmecho);
}
}
x = home.first, y = home.second;
return dmecho[x][y] < dbee[x][y];
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> s;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
cin >> grid[i][j];
if (grid[i][j] == 'M') init = {i, j};
else if (grid[i][j] == 'D') home = {i, j};
else if(grid[i][j] == 'H') hive.push_back({i, j});
}
}
int l = 0, r = n*n, ans = 0;
while (l <= r) {
int m = (l + r)/2;
if (valid(m)) ans = m, l = m + 1;
else r = m - 1;
}
cout << ans << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 3 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 4 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 5 |
Correct |
0 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Execution timed out |
1081 ms |
12664 KB |
Time limit exceeded |
| 8 |
Incorrect |
1 ms |
468 KB |
Output isn't correct |
| 9 |
Correct |
1 ms |
468 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Incorrect |
5 ms |
980 KB |
Output isn't correct |
| 13 |
Incorrect |
4 ms |
852 KB |
Output isn't correct |
| 14 |
Incorrect |
5 ms |
980 KB |
Output isn't correct |
| 15 |
Incorrect |
1 ms |
468 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
468 KB |
Output is correct |
| 17 |
Incorrect |
1 ms |
596 KB |
Output isn't correct |
| 18 |
Correct |
1 ms |
596 KB |
Output is correct |
| 19 |
Incorrect |
1 ms |
596 KB |
Output isn't correct |
| 20 |
Correct |
2 ms |
596 KB |
Output is correct |
| 21 |
Incorrect |
2 ms |
852 KB |
Output isn't correct |
| 22 |
Correct |
2 ms |
724 KB |
Output is correct |
| 23 |
Incorrect |
5 ms |
852 KB |
Output isn't correct |
| 24 |
Correct |
4 ms |
852 KB |
Output is correct |
| 25 |
Incorrect |
5 ms |
980 KB |
Output isn't correct |
| 26 |
Correct |
5 ms |
980 KB |
Output is correct |
| 27 |
Incorrect |
6 ms |
980 KB |
Output isn't correct |
| 28 |
Correct |
6 ms |
1092 KB |
Output is correct |
| 29 |
Incorrect |
7 ms |
1108 KB |
Output isn't correct |
| 30 |
Correct |
9 ms |
1108 KB |
Output is correct |
| 31 |
Incorrect |
8 ms |
1108 KB |
Output isn't correct |
| 32 |
Correct |
10 ms |
1212 KB |
Output is correct |
| 33 |
Incorrect |
191 ms |
5460 KB |
Output isn't correct |
| 34 |
Correct |
195 ms |
5580 KB |
Output is correct |
| 35 |
Correct |
225 ms |
5588 KB |
Output is correct |
| 36 |
Incorrect |
270 ms |
6228 KB |
Output isn't correct |
| 37 |
Correct |
267 ms |
6324 KB |
Output is correct |
| 38 |
Correct |
308 ms |
6320 KB |
Output is correct |
| 39 |
Incorrect |
346 ms |
7060 KB |
Output isn't correct |
| 40 |
Correct |
341 ms |
7056 KB |
Output is correct |
| 41 |
Correct |
382 ms |
6996 KB |
Output is correct |
| 42 |
Incorrect |
420 ms |
7764 KB |
Output isn't correct |
| 43 |
Correct |
415 ms |
7804 KB |
Output is correct |
| 44 |
Correct |
480 ms |
7764 KB |
Output is correct |
| 45 |
Incorrect |
555 ms |
8556 KB |
Output isn't correct |
| 46 |
Correct |
507 ms |
8556 KB |
Output is correct |
| 47 |
Correct |
573 ms |
8564 KB |
Output is correct |
| 48 |
Incorrect |
640 ms |
9324 KB |
Output isn't correct |
| 49 |
Correct |
632 ms |
9420 KB |
Output is correct |
| 50 |
Correct |
695 ms |
9300 KB |
Output is correct |
| 51 |
Incorrect |
740 ms |
10068 KB |
Output isn't correct |
| 52 |
Correct |
742 ms |
10052 KB |
Output is correct |
| 53 |
Correct |
907 ms |
10080 KB |
Output is correct |
| 54 |
Incorrect |
845 ms |
10796 KB |
Output isn't correct |
| 55 |
Correct |
862 ms |
10796 KB |
Output is correct |
| 56 |
Execution timed out |
1036 ms |
10816 KB |
Time limit exceeded |
| 57 |
Execution timed out |
1006 ms |
11560 KB |
Time limit exceeded |
| 58 |
Correct |
982 ms |
11604 KB |
Output is correct |
| 59 |
Execution timed out |
1088 ms |
11476 KB |
Time limit exceeded |
| 60 |
Execution timed out |
1083 ms |
12244 KB |
Time limit exceeded |
| 61 |
Execution timed out |
1077 ms |
12244 KB |
Time limit exceeded |
| 62 |
Execution timed out |
1090 ms |
12244 KB |
Time limit exceeded |
| 63 |
Execution timed out |
1089 ms |
12272 KB |
Time limit exceeded |
| 64 |
Execution timed out |
1094 ms |
12244 KB |
Time limit exceeded |
| 65 |
Execution timed out |
1094 ms |
12328 KB |
Time limit exceeded |
| 66 |
Execution timed out |
1100 ms |
12244 KB |
Time limit exceeded |
| 67 |
Execution timed out |
1092 ms |
12244 KB |
Time limit exceeded |
| 68 |
Execution timed out |
1088 ms |
12372 KB |
Time limit exceeded |
| 69 |
Execution timed out |
1087 ms |
12380 KB |
Time limit exceeded |
| 70 |
Execution timed out |
1095 ms |
12372 KB |
Time limit exceeded |
| 71 |
Execution timed out |
1091 ms |
12300 KB |
Time limit exceeded |
| 72 |
Execution timed out |
1059 ms |
12372 KB |
Time limit exceeded |
| 73 |
Execution timed out |
1095 ms |
13192 KB |
Time limit exceeded |
| 74 |
Execution timed out |
1095 ms |
12976 KB |
Time limit exceeded |
| 75 |
Execution timed out |
1082 ms |
13000 KB |
Time limit exceeded |
| 76 |
Execution timed out |
1098 ms |
12988 KB |
Time limit exceeded |
| 77 |
Execution timed out |
1085 ms |
13084 KB |
Time limit exceeded |
| 78 |
Execution timed out |
1097 ms |
13004 KB |
Time limit exceeded |
| 79 |
Execution timed out |
1096 ms |
13116 KB |
Time limit exceeded |
| 80 |
Execution timed out |
1093 ms |
12980 KB |
Time limit exceeded |
| 81 |
Execution timed out |
1098 ms |
13004 KB |
Time limit exceeded |
| 82 |
Execution timed out |
1093 ms |
13008 KB |
Time limit exceeded |
| 83 |
Execution timed out |
1096 ms |
12704 KB |
Time limit exceeded |
| 84 |
Execution timed out |
1100 ms |
12740 KB |
Time limit exceeded |
| 85 |
Execution timed out |
1086 ms |
12780 KB |
Time limit exceeded |
| 86 |
Execution timed out |
1099 ms |
12792 KB |
Time limit exceeded |
| 87 |
Execution timed out |
1089 ms |
12896 KB |
Time limit exceeded |
| 88 |
Execution timed out |
1093 ms |
12684 KB |
Time limit exceeded |
| 89 |
Execution timed out |
1070 ms |
12680 KB |
Time limit exceeded |
| 90 |
Execution timed out |
1094 ms |
12748 KB |
Time limit exceeded |
| 91 |
Execution timed out |
1098 ms |
12688 KB |
Time limit exceeded |
| 92 |
Execution timed out |
1099 ms |
12720 KB |
Time limit exceeded |
