| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 445070 | 2021-07-16T11:02:49 Z | KazamaHoang | Tracks in the Snow (BOI13_tracks) | C++17 | 898 ms | 121664 KB |
#include <bits/stdc++.h>
#define F first
#define S second
#define eb emplace_back
#define bit(x, i) (((x) >> (i)) & 1)
#define sz(x) ((int)x.size())
using namespace std;
using ll = long long;
const int inf = 1061109567;
const ll INF = 4557430888798830399;
const int MOD = 1e9 + 7;
const int dx[] = {0, 1, -1, 0};
const int dy[] = {1, 0, 0, -1};
int numRow, numCol;
char snow[4005][4005];
int dist[4005][4005];
bool outSide(int ux, int vy) {
if (ux == 0 || ux == numRow || vy == 0 || vy == numCol || snow[ux][vy] == '.')
return true;
return false;
}
int main() {
cin.tie(0)->sync_with_stdio(0);
#define Task ""
if (fopen(Task".in", "r")) {
freopen(Task".in", "r", stdin);
freopen(Task".out", "w", stdout);
}
cin >> numRow >> numCol;
for (int i = 1; i <= numRow; ++ i)
for (int j = 1; j <= numCol; ++ j)
cin >> snow[i][j];
deque <pair <int, int>> dq;
dq.push_back({1, 1});
dist[1][1] = 1;
int res = 0;
while (!dq.empty()) {
int u = dq.front().F;
int v = dq.front().S;
dq.pop_front();
res = max(res, dist[u][v]);
for (int i = 0; i <= 3; ++ i) {
int ux = u + dx[i];
int vy = v + dy[i];
if (outSide(ux, vy) || dist[ux][vy] != 0)
continue;
if (snow[ux][vy] == snow[u][v]) {
dq.push_front({ux, vy});
dist[ux][vy] = dist[u][v];
} else {
dq.push_back({ux, vy});
dist[ux][vy] = dist[u][v] + 1;
}
}
}
cout << res;
return 0;
}
// Written by Kazama Hoang ^^
Compilation message
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 16 ms | 5196 KB | Output is correct |
| 2 | Correct | 1 ms | 460 KB | Output is correct |
| 3 | Correct | 1 ms | 716 KB | Output is correct |
| 4 | Correct | 10 ms | 5040 KB | Output is correct |
| 5 | Correct | 4 ms | 2892 KB | Output is correct |
| 6 | Correct | 1 ms | 460 KB | Output is correct |
| 7 | Correct | 1 ms | 716 KB | Output is correct |
| 8 | Incorrect | 1 ms | 716 KB | Output isn't correct |
| 9 | Correct | 1 ms | 1100 KB | Output is correct |
| 10 | Correct | 4 ms | 2380 KB | Output is correct |
| 11 | Correct | 3 ms | 2124 KB | Output is correct |
| 12 | Correct | 6 ms | 3004 KB | Output is correct |
| 13 | Correct | 5 ms | 2892 KB | Output is correct |
| 14 | Correct | 5 ms | 2800 KB | Output is correct |
| 15 | Correct | 14 ms | 4936 KB | Output is correct |
| 16 | Correct | 16 ms | 5100 KB | Output is correct |
| 17 | Correct | 12 ms | 4912 KB | Output is correct |
| 18 | Correct | 10 ms | 4940 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Incorrect | 15 ms | 30588 KB | Output isn't correct |
| 2 | Correct | 61 ms | 13508 KB | Output is correct |
| 3 | Correct | 398 ms | 46624 KB | Output is correct |
| 4 | Correct | 113 ms | 28996 KB | Output is correct |
| 5 | Incorrect | 141 ms | 24032 KB | Output isn't correct |
| 6 | Correct | 866 ms | 93100 KB | Output is correct |
| 7 | Correct | 17 ms | 32076 KB | Output is correct |
| 8 | Incorrect | 16 ms | 30668 KB | Output isn't correct |
| 9 | Correct | 3 ms | 588 KB | Output is correct |
| 10 | Correct | 1 ms | 332 KB | Output is correct |
| 11 | Correct | 17 ms | 31496 KB | Output is correct |
| 12 | Incorrect | 1 ms | 844 KB | Output isn't correct |
| 13 | Correct | 63 ms | 13408 KB | Output is correct |
| 14 | Correct | 36 ms | 9540 KB | Output is correct |
| 15 | Correct | 33 ms | 12024 KB | Output is correct |
| 16 | Correct | 29 ms | 5072 KB | Output is correct |
| 17 | Correct | 159 ms | 24880 KB | Output is correct |
| 18 | Correct | 134 ms | 31676 KB | Output is correct |
| 19 | Correct | 115 ms | 29072 KB | Output is correct |
| 20 | Correct | 93 ms | 17692 KB | Output is correct |
| 21 | Correct | 241 ms | 43404 KB | Output is correct |
| 22 | Incorrect | 145 ms | 24116 KB | Output isn't correct |
| 23 | Correct | 297 ms | 36252 KB | Output is correct |
| 24 | Correct | 239 ms | 36604 KB | Output is correct |
| 25 | Incorrect | 252 ms | 16060 KB | Output isn't correct |
| 26 | Correct | 898 ms | 119088 KB | Output is correct |
| 27 | Correct | 862 ms | 121664 KB | Output is correct |
| 28 | Correct | 864 ms | 92960 KB | Output is correct |
| 29 | Correct | 855 ms | 90244 KB | Output is correct |
| 30 | Correct | 879 ms | 97528 KB | Output is correct |
| 31 | Incorrect | 632 ms | 63508 KB | Output isn't correct |
| 32 | Correct | 873 ms | 100856 KB | Output is correct |