| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1065620 |
2024-08-19T10:02:35 Z |
belgianbot |
Mecho (IOI09_mecho) |
C++17 |
|
1000 ms |
65536 KB |
#include <bits/stdc++.h>
#define int long long
#define se second
#define fi first
using namespace std;
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
int N, S; cin >> N >> S;
vector<vector<char>> grid(N, vector<char>(N));
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) cin >> grid[i][j];
}
int start, end;
vector<vector<int>> adj(N * N);
vector<int> hives;
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
if (grid[i][j] == 'H') hives.push_back(i * N + j);
else if (grid[i][j] == 'M') start = i * N + j;
else if (grid[i][j] == 'D') end = i * N + j;
if (grid[i][j] != 'G') continue;
if (i && (grid[i - 1][j] == 'D' || grid[i - 1][j] == 'H' || grid[i - 1][j] == 'M' || grid[i - 1][j] == 'G')) adj[i * N - N + j].push_back(i * N + j);
if (j && (grid[i][j-1] == 'D' || grid[i][j-1] == 'H' || grid[i][j-1] == 'M' || grid[i][j-1] == 'G')) adj[i * N + j-1].push_back(i * N + j);
if (i != N - 1 && (grid[i + 1][j] == 'D' || grid[i + 1][j] == 'H' || grid[i + 1][j] == 'M' || grid[i + 1][j] == 'G')) adj[i * N + N + j].push_back(i * N + j);
if (j != N - 1 && (grid[i][j+1] == 'D' || grid[i][j+1] == 'H' || grid[i][j+1] == 'M' || grid[i][j+1] == 'G')) adj[i * N + j+1].push_back(i * N + j);
}
}
vector<int> dist(N * N, INT_MAX);
for (int x : hives) {
priority_queue<pair<int,int>> q;
q.push({0,x});
set<int> processed;
dist[x] = 0;
while(!q.empty()) {
auto u = q.top(); q.pop();
if (processed.find(u.se) != processed.end()) continue;
processed.insert(u.se);
for (int y : adj[u.se]) {
if (-u.fi + 1 < dist[y]) {
dist[y] = -u.fi + 1;
q.push({-dist[y], y});
}
}
}
}
int l = 1, r = N * N;
while (l <= r) {
int mid = l + (r - l) / 2;
vector<double> mecho(N * N, INT_MAX);
mecho[start] = mid;
priority_queue<pair<double,int>> q;
q.push({double(-mid), start});
set<int> processed;
while(!q.empty()) {
auto u = q.top(); q.pop();
if (processed.find(u.se) != processed.end()) continue;
processed.insert(u.se);
for (int y : adj[u.se]) {
if (-u.fi + 1.0 / double(S) < dist[y] && -u.fi + 1.0 / double(S) < mecho[y]) {
mecho[y] = -u.fi + 1.0 / double(S);
q.push({-mecho[y], y});
}
}
}
bool won = false;
for (int y : adj[end]) if (mecho[y] != INT_MAX) won = true;
if (won) l = mid + 1;
else r = mid - 1;
}
cout << l - 1 << '\n';
return 0;
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:60:14: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]
60 | mecho[start] = mid;
| ^
mecho.cpp:78:23: warning: 'end' may be used uninitialized in this function [-Wmaybe-uninitialized]
78 | for (int y : adj[end]) if (mecho[y] != INT_MAX) won = true;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
408 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Runtime error |
210 ms |
65536 KB |
Execution killed with signal 9 |
| 8 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
604 KB |
Output isn't correct |
| 13 |
Incorrect |
5 ms |
604 KB |
Output isn't correct |
| 14 |
Incorrect |
8 ms |
860 KB |
Output isn't correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
344 KB |
Output is correct |
| 17 |
Correct |
1 ms |
344 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
456 KB |
Output is correct |
| 24 |
Correct |
1 ms |
452 KB |
Output is correct |
| 25 |
Correct |
1 ms |
604 KB |
Output is correct |
| 26 |
Correct |
1 ms |
604 KB |
Output is correct |
| 27 |
Correct |
1 ms |
716 KB |
Output is correct |
| 28 |
Correct |
2 ms |
712 KB |
Output is correct |
| 29 |
Correct |
1 ms |
604 KB |
Output is correct |
| 30 |
Correct |
2 ms |
604 KB |
Output is correct |
| 31 |
Correct |
2 ms |
860 KB |
Output is correct |
| 32 |
Correct |
1 ms |
860 KB |
Output is correct |
| 33 |
Correct |
23 ms |
9304 KB |
Output is correct |
| 34 |
Correct |
28 ms |
10076 KB |
Output is correct |
| 35 |
Correct |
278 ms |
13504 KB |
Output is correct |
| 36 |
Correct |
32 ms |
11944 KB |
Output is correct |
| 37 |
Correct |
38 ms |
13140 KB |
Output is correct |
| 38 |
Correct |
398 ms |
17520 KB |
Output is correct |
| 39 |
Correct |
48 ms |
15128 KB |
Output is correct |
| 40 |
Correct |
54 ms |
16544 KB |
Output is correct |
| 41 |
Correct |
544 ms |
22144 KB |
Output is correct |
| 42 |
Correct |
46 ms |
18468 KB |
Output is correct |
| 43 |
Correct |
89 ms |
20308 KB |
Output is correct |
| 44 |
Correct |
753 ms |
27188 KB |
Output is correct |
| 45 |
Correct |
53 ms |
22212 KB |
Output is correct |
| 46 |
Correct |
81 ms |
24664 KB |
Output is correct |
| 47 |
Correct |
869 ms |
32884 KB |
Output is correct |
| 48 |
Correct |
66 ms |
26452 KB |
Output is correct |
| 49 |
Correct |
88 ms |
29268 KB |
Output is correct |
| 50 |
Execution timed out |
1008 ms |
39056 KB |
Time limit exceeded |
| 51 |
Correct |
84 ms |
31104 KB |
Output is correct |
| 52 |
Correct |
112 ms |
34228 KB |
Output is correct |
| 53 |
Execution timed out |
1056 ms |
45632 KB |
Time limit exceeded |
| 54 |
Correct |
100 ms |
35924 KB |
Output is correct |
| 55 |
Correct |
129 ms |
39748 KB |
Output is correct |
| 56 |
Execution timed out |
1052 ms |
52916 KB |
Time limit exceeded |
| 57 |
Correct |
111 ms |
41004 KB |
Output is correct |
| 58 |
Correct |
161 ms |
45396 KB |
Output is correct |
| 59 |
Execution timed out |
1020 ms |
60468 KB |
Time limit exceeded |
| 60 |
Correct |
126 ms |
46676 KB |
Output is correct |
| 61 |
Correct |
172 ms |
51792 KB |
Output is correct |
| 62 |
Runtime error |
881 ms |
65536 KB |
Execution killed with signal 9 |
| 63 |
Execution timed out |
1056 ms |
53076 KB |
Time limit exceeded |
| 64 |
Execution timed out |
1016 ms |
56604 KB |
Time limit exceeded |
| 65 |
Execution timed out |
1034 ms |
56364 KB |
Time limit exceeded |
| 66 |
Execution timed out |
1037 ms |
53180 KB |
Time limit exceeded |
| 67 |
Execution timed out |
1049 ms |
53072 KB |
Time limit exceeded |
| 68 |
Execution timed out |
1042 ms |
53072 KB |
Time limit exceeded |
| 69 |
Execution timed out |
1094 ms |
53144 KB |
Time limit exceeded |
| 70 |
Execution timed out |
1070 ms |
53176 KB |
Time limit exceeded |
| 71 |
Execution timed out |
1078 ms |
53184 KB |
Time limit exceeded |
| 72 |
Execution timed out |
1084 ms |
52740 KB |
Time limit exceeded |
| 73 |
Runtime error |
225 ms |
65536 KB |
Execution killed with signal 9 |
| 74 |
Runtime error |
207 ms |
65536 KB |
Execution killed with signal 9 |
| 75 |
Runtime error |
212 ms |
65536 KB |
Execution killed with signal 9 |
| 76 |
Runtime error |
206 ms |
65536 KB |
Execution killed with signal 9 |
| 77 |
Runtime error |
216 ms |
65536 KB |
Execution killed with signal 9 |
| 78 |
Runtime error |
205 ms |
65536 KB |
Execution killed with signal 9 |
| 79 |
Runtime error |
234 ms |
65536 KB |
Execution killed with signal 9 |
| 80 |
Runtime error |
223 ms |
65536 KB |
Execution killed with signal 9 |
| 81 |
Runtime error |
252 ms |
65536 KB |
Execution killed with signal 9 |
| 82 |
Runtime error |
215 ms |
65536 KB |
Execution killed with signal 9 |
| 83 |
Runtime error |
215 ms |
65536 KB |
Execution killed with signal 9 |
| 84 |
Runtime error |
228 ms |
65536 KB |
Execution killed with signal 9 |
| 85 |
Runtime error |
242 ms |
65536 KB |
Execution killed with signal 9 |
| 86 |
Runtime error |
211 ms |
65536 KB |
Execution killed with signal 9 |
| 87 |
Runtime error |
235 ms |
65536 KB |
Execution killed with signal 9 |
| 88 |
Runtime error |
217 ms |
65536 KB |
Execution killed with signal 9 |
| 89 |
Runtime error |
247 ms |
65536 KB |
Execution killed with signal 9 |
| 90 |
Runtime error |
249 ms |
65536 KB |
Execution killed with signal 9 |
| 91 |
Runtime error |
233 ms |
65536 KB |
Execution killed with signal 9 |
| 92 |
Runtime error |
230 ms |
65536 KB |
Execution killed with signal 9 |
