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Submission #738896

# Submission time Handle Problem Language Result Execution time Memory
738896 2023-05-09T15:33:46 Z He_Huanglu Maze (JOI23_ho_t3) C++17
8 / 100
 496 ms 628496 KB 
#include <bits/stdc++.h>
#define ii pair<int, int>
#define fi first
#define se second
using namespace std;

const int N = 6e6 + 3;
int n, m, s, rs, cs, re, ce;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
vector <int> f[N], a[N], p[2][N];
queue <ii> q[2];

int get(int t, int id, int u) {
    return p[t][id][u] == u ? u : p[t][id][u] = get(t, id, p[t][id][u]);
}

void upd(int t, int id, int i, int j, int val) {
    int u = get(t, id, i);
    while (u <= j) {
        if(t) f[id][u] = val;
        else f[u][id] = val;
        u = get(t, id, u + 1);
        p[t][id][i] = u;
    }
}

main () {
    cin.tie(0)->sync_with_stdio(0);
    if(fopen("task.inp", "r")) {
        freopen("task.inp", "r", stdin);
        freopen("wa.out", "w", stdout);
    }
    cin >> m >> n >> s >> rs >> cs >> re >> ce;
    for(int i = 1; i <= m; i++) a[i].resize(n + 1), f[i].resize(n + 1);
    for(int i = 1; i <= m; i++) {
        for(int j = 0; j <= n + 1; j++) p[1][i].push_back(j);
    }
    for(int i = 1; i <= n; i++) {
        for(int j = 0; j <= m + 1; j++) p[0][i].push_back(j);
    }
    for(int i = 1; i <= m; i++) {
        for(int j = 1; j <= n; j++) {
            char ch; cin >> ch;
            a[i][j] = (ch == '.' ? 1 : 0);
        }
    }
    q[1].push({rs, cs}); f[rs][cs] = 1;
    while (!q[1].empty() || !q[0].empty()) {
        while (!q[1].empty()) {
            int x, y; tie(x, y) = q[1].front(); q[1].pop();
            q[0].push({x, y});
            if(x == re && y == ce) return cout << f[x][y] - 1 << "\n", 0;
            for(int i = 0; i < 4; i++) {
                int u = x + dx[i], v = y + dy[i];
                if(u && u <= m && v && v <= n && !f[u][v] && a[u][v]) {
                    f[u][v] = f[x][y];
                    q[1].push({u, v});
                }
            }
        }
        while (!q[0].empty()) {
            int x, y; tie(x, y) = q[0].front(); q[0].pop();
            if(s != 1) {
                if(x == rs && y == cs) {
                    int s1 = max(1, x - s), s2 = max(1, y - s);
                    int s3 = min(m, x + s), s4 = min(n, y + s);
                    for(int i = s1; i <= s3; i++) {
                        for(int j = s2; j <= s4; j++) if(!f[i][j]) {
                            f[i][j] = f[x][y] + 1;
                            q[1].push({i, j});
                        }
                    }
                    continue;
                }
                for(int i = 0; i < 4; i++) {
                    int u = x + dx[i], v = y + dy[i], val = f[x][y] + 1;
                    if(i == 0) upd(0, min(n, y + s), max(1, x - s), min(m, x + s), val);
                    if(i == 1) upd(1, min(m, x + s), max(1, y - s), min(n, y + s), val);
                    if(i == 2) upd(0, max(1, y - s), max(1, x - s), min(m, x + s), val);
                    if(i == 3) upd(1, max(1, x - s), max(1, y - s), min(n, y + s), val);
                    break ;
                }
            }
            else {
                for(int i = 0; i < 4; i++) {
                    int u = x + dx[i], v = y + dy[i];
                    if(u && u <= m && v && v <= n && !f[u][v]) {
                        f[u][v] = f[x][y] + 1;
                        q[1].push({u, v});
                    }
                }
            }
        }
    }
}

Compilation message

Main.cpp:28:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   28 | main () {
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:77:25: warning: unused variable 'u' [-Wunused-variable]
   77 |                     int u = x + dx[i], v = y + dy[i], val = f[x][y] + 1;
      |                         ^
Main.cpp:77:40: warning: unused variable 'v' [-Wunused-variable]
   77 |                     int u = x + dx[i], v = y + dy[i], val = f[x][y] + 1;
      |                                        ^
Main.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen("task.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:32:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         freopen("wa.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 274 ms 563900 KB Output is correct
2 Correct 271 ms 563884 KB Output is correct
3 Correct 282 ms 563916 KB Output is correct
4 Correct 270 ms 563904 KB Output is correct
5 Correct 272 ms 563844 KB Output is correct
6 Correct 258 ms 563896 KB Output is correct
7 Correct 289 ms 563940 KB Output is correct
8 Correct 265 ms 563844 KB Output is correct
9 Correct 270 ms 563792 KB Output is correct
10 Correct 276 ms 563820 KB Output is correct
11 Correct 278 ms 563860 KB Output is correct
12 Correct 274 ms 563788 KB Output is correct
13 Correct 281 ms 563904 KB Output is correct
14 Correct 275 ms 563816 KB Output is correct
15 Correct 260 ms 563880 KB Output is correct
16 Correct 277 ms 563936 KB Output is correct
17 Correct 274 ms 563888 KB Output is correct
18 Correct 261 ms 563936 KB Output is correct
19 Correct 273 ms 564812 KB Output is correct
20 Correct 264 ms 565812 KB Output is correct
21 Correct 259 ms 565388 KB Output is correct
22 Correct 276 ms 564896 KB Output is correct
23 Correct 272 ms 564824 KB Output is correct
24 Correct 295 ms 566448 KB Output is correct
25 Correct 274 ms 566484 KB Output is correct
26 Correct 277 ms 564888 KB Output is correct
27 Correct 259 ms 564896 KB Output is correct
28 Correct 271 ms 564824 KB Output is correct
29 Correct 265 ms 566604 KB Output is correct
30 Correct 279 ms 565528 KB Output is correct
31 Correct 300 ms 567752 KB Output is correct
32 Correct 274 ms 566684 KB Output is correct
33 Correct 268 ms 566712 KB Output is correct
34 Correct 282 ms 570312 KB Output is correct
35 Correct 282 ms 570320 KB Output is correct
36 Correct 267 ms 566880 KB Output is correct
37 Correct 289 ms 566724 KB Output is correct
38 Correct 269 ms 566676 KB Output is correct
39 Correct 399 ms 595360 KB Output is correct
40 Correct 284 ms 567320 KB Output is correct
41 Correct 279 ms 571788 KB Output is correct
42 Correct 282 ms 568260 KB Output is correct
43 Correct 285 ms 570500 KB Output is correct
44 Correct 325 ms 578528 KB Output is correct
45 Correct 311 ms 580872 KB Output is correct
46 Correct 325 ms 598196 KB Output is correct
47 Correct 383 ms 595364 KB Output is correct
48 Correct 368 ms 595360 KB Output is correct
49 Correct 486 ms 628496 KB Output is correct
50 Correct 496 ms 628464 KB Output is correct
51 Correct 395 ms 595916 KB Output is correct
52 Correct 351 ms 595396 KB Output is correct
53 Correct 397 ms 595276 KB Output is correct

Subtask #2
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 563916 KB Output is correct
2 Correct 256 ms 563880 KB Output is correct
3 Correct 250 ms 563848 KB Output is correct
4 Correct 262 ms 563904 KB Output is correct
5 Correct 265 ms 563928 KB Output is correct
6 Correct 259 ms 563848 KB Output is correct
7 Correct 262 ms 563856 KB Output is correct
8 Incorrect 260 ms 563912 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 267 ms 563860 KB Output is correct
2 Correct 256 ms 563800 KB Output is correct
3 Correct 268 ms 563844 KB Output is correct
4 Correct 281 ms 563896 KB Output is correct
5 Correct 255 ms 563944 KB Output is correct
6 Correct 262 ms 563796 KB Output is correct
7 Correct 260 ms 563924 KB Output is correct
8 Correct 252 ms 563848 KB Output is correct
9 Correct 256 ms 563916 KB Output is correct
10 Correct 254 ms 563920 KB Output is correct
11 Correct 251 ms 563948 KB Output is correct
12 Correct 255 ms 563956 KB Output is correct
13 Correct 251 ms 563888 KB Output is correct
14 Incorrect 262 ms 563836 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 563916 KB Output is correct
2 Correct 256 ms 563880 KB Output is correct
3 Correct 250 ms 563848 KB Output is correct
4 Correct 262 ms 563904 KB Output is correct
5 Correct 265 ms 563928 KB Output is correct
6 Correct 259 ms 563848 KB Output is correct
7 Correct 262 ms 563856 KB Output is correct
8 Incorrect 260 ms 563912 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 563916 KB Output is correct
2 Correct 256 ms 563880 KB Output is correct
3 Correct 250 ms 563848 KB Output is correct
4 Correct 262 ms 563904 KB Output is correct
5 Correct 265 ms 563928 KB Output is correct
6 Correct 259 ms 563848 KB Output is correct
7 Correct 262 ms 563856 KB Output is correct
8 Incorrect 260 ms 563912 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 274 ms 563900 KB Output is correct
2 Correct 271 ms 563884 KB Output is correct
3 Correct 282 ms 563916 KB Output is correct
4 Correct 270 ms 563904 KB Output is correct
5 Correct 272 ms 563844 KB Output is correct
6 Correct 258 ms 563896 KB Output is correct
7 Correct 289 ms 563940 KB Output is correct
8 Correct 265 ms 563844 KB Output is correct
9 Correct 270 ms 563792 KB Output is correct
10 Correct 276 ms 563820 KB Output is correct
11 Correct 278 ms 563860 KB Output is correct
12 Correct 274 ms 563788 KB Output is correct
13 Correct 281 ms 563904 KB Output is correct
14 Correct 275 ms 563816 KB Output is correct
15 Correct 260 ms 563880 KB Output is correct
16 Correct 277 ms 563936 KB Output is correct
17 Correct 274 ms 563888 KB Output is correct
18 Correct 261 ms 563936 KB Output is correct
19 Correct 273 ms 564812 KB Output is correct
20 Correct 264 ms 565812 KB Output is correct
21 Correct 259 ms 565388 KB Output is correct
22 Correct 276 ms 564896 KB Output is correct
23 Correct 272 ms 564824 KB Output is correct
24 Correct 295 ms 566448 KB Output is correct
25 Correct 274 ms 566484 KB Output is correct
26 Correct 277 ms 564888 KB Output is correct
27 Correct 259 ms 564896 KB Output is correct
28 Correct 271 ms 564824 KB Output is correct
29 Correct 265 ms 566604 KB Output is correct
30 Correct 279 ms 565528 KB Output is correct
31 Correct 300 ms 567752 KB Output is correct
32 Correct 274 ms 566684 KB Output is correct
33 Correct 268 ms 566712 KB Output is correct
34 Correct 282 ms 570312 KB Output is correct
35 Correct 282 ms 570320 KB Output is correct
36 Correct 267 ms 566880 KB Output is correct
37 Correct 289 ms 566724 KB Output is correct
38 Correct 269 ms 566676 KB Output is correct
39 Correct 399 ms 595360 KB Output is correct
40 Correct 284 ms 567320 KB Output is correct
41 Correct 279 ms 571788 KB Output is correct
42 Correct 282 ms 568260 KB Output is correct
43 Correct 285 ms 570500 KB Output is correct
44 Correct 325 ms 578528 KB Output is correct
45 Correct 311 ms 580872 KB Output is correct
46 Correct 325 ms 598196 KB Output is correct
47 Correct 383 ms 595364 KB Output is correct
48 Correct 368 ms 595360 KB Output is correct
49 Correct 486 ms 628496 KB Output is correct
50 Correct 496 ms 628464 KB Output is correct
51 Correct 395 ms 595916 KB Output is correct
52 Correct 351 ms 595396 KB Output is correct
53 Correct 397 ms 595276 KB Output is correct
54 Correct 249 ms 563916 KB Output is correct
55 Correct 256 ms 563880 KB Output is correct
56 Correct 250 ms 563848 KB Output is correct
57 Correct 262 ms 563904 KB Output is correct
58 Correct 265 ms 563928 KB Output is correct
59 Correct 259 ms 563848 KB Output is correct
60 Correct 262 ms 563856 KB Output is correct
61 Incorrect 260 ms 563912 KB Output isn't correct
62 Halted 0 ms 0 KB -

Subtask #7
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 274 ms 563900 KB Output is correct
2 Correct 271 ms 563884 KB Output is correct
3 Correct 282 ms 563916 KB Output is correct
4 Correct 270 ms 563904 KB Output is correct
5 Correct 272 ms 563844 KB Output is correct
6 Correct 258 ms 563896 KB Output is correct
7 Correct 289 ms 563940 KB Output is correct
8 Correct 265 ms 563844 KB Output is correct
9 Correct 270 ms 563792 KB Output is correct
10 Correct 276 ms 563820 KB Output is correct
11 Correct 278 ms 563860 KB Output is correct
12 Correct 274 ms 563788 KB Output is correct
13 Correct 281 ms 563904 KB Output is correct
14 Correct 275 ms 563816 KB Output is correct
15 Correct 260 ms 563880 KB Output is correct
16 Correct 277 ms 563936 KB Output is correct
17 Correct 274 ms 563888 KB Output is correct
18 Correct 261 ms 563936 KB Output is correct
19 Correct 273 ms 564812 KB Output is correct
20 Correct 264 ms 565812 KB Output is correct
21 Correct 259 ms 565388 KB Output is correct
22 Correct 276 ms 564896 KB Output is correct
23 Correct 272 ms 564824 KB Output is correct
24 Correct 295 ms 566448 KB Output is correct
25 Correct 274 ms 566484 KB Output is correct
26 Correct 277 ms 564888 KB Output is correct
27 Correct 259 ms 564896 KB Output is correct
28 Correct 271 ms 564824 KB Output is correct
29 Correct 265 ms 566604 KB Output is correct
30 Correct 279 ms 565528 KB Output is correct
31 Correct 300 ms 567752 KB Output is correct
32 Correct 274 ms 566684 KB Output is correct
33 Correct 268 ms 566712 KB Output is correct
34 Correct 282 ms 570312 KB Output is correct
35 Correct 282 ms 570320 KB Output is correct
36 Correct 267 ms 566880 KB Output is correct
37 Correct 289 ms 566724 KB Output is correct
38 Correct 269 ms 566676 KB Output is correct
39 Correct 399 ms 595360 KB Output is correct
40 Correct 284 ms 567320 KB Output is correct
41 Correct 279 ms 571788 KB Output is correct
42 Correct 282 ms 568260 KB Output is correct
43 Correct 285 ms 570500 KB Output is correct
44 Correct 325 ms 578528 KB Output is correct
45 Correct 311 ms 580872 KB Output is correct
46 Correct 325 ms 598196 KB Output is correct
47 Correct 383 ms 595364 KB Output is correct
48 Correct 368 ms 595360 KB Output is correct
49 Correct 486 ms 628496 KB Output is correct
50 Correct 496 ms 628464 KB Output is correct
51 Correct 395 ms 595916 KB Output is correct
52 Correct 351 ms 595396 KB Output is correct
53 Correct 397 ms 595276 KB Output is correct
54 Correct 249 ms 563916 KB Output is correct
55 Correct 256 ms 563880 KB Output is correct
56 Correct 250 ms 563848 KB Output is correct
57 Correct 262 ms 563904 KB Output is correct
58 Correct 265 ms 563928 KB Output is correct
59 Correct 259 ms 563848 KB Output is correct
60 Correct 262 ms 563856 KB Output is correct
61 Incorrect 260 ms 563912 KB Output isn't correct
62 Halted 0 ms 0 KB -

Subtask #8
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 274 ms 563900 KB Output is correct
2 Correct 271 ms 563884 KB Output is correct
3 Correct 282 ms 563916 KB Output is correct
4 Correct 270 ms 563904 KB Output is correct
5 Correct 272 ms 563844 KB Output is correct
6 Correct 258 ms 563896 KB Output is correct
7 Correct 289 ms 563940 KB Output is correct
8 Correct 265 ms 563844 KB Output is correct
9 Correct 270 ms 563792 KB Output is correct
10 Correct 276 ms 563820 KB Output is correct
11 Correct 278 ms 563860 KB Output is correct
12 Correct 274 ms 563788 KB Output is correct
13 Correct 281 ms 563904 KB Output is correct
14 Correct 275 ms 563816 KB Output is correct
15 Correct 260 ms 563880 KB Output is correct
16 Correct 277 ms 563936 KB Output is correct
17 Correct 274 ms 563888 KB Output is correct
18 Correct 261 ms 563936 KB Output is correct
19 Correct 273 ms 564812 KB Output is correct
20 Correct 264 ms 565812 KB Output is correct
21 Correct 259 ms 565388 KB Output is correct
22 Correct 276 ms 564896 KB Output is correct
23 Correct 272 ms 564824 KB Output is correct
24 Correct 295 ms 566448 KB Output is correct
25 Correct 274 ms 566484 KB Output is correct
26 Correct 277 ms 564888 KB Output is correct
27 Correct 259 ms 564896 KB Output is correct
28 Correct 271 ms 564824 KB Output is correct
29 Correct 265 ms 566604 KB Output is correct
30 Correct 279 ms 565528 KB Output is correct
31 Correct 300 ms 567752 KB Output is correct
32 Correct 274 ms 566684 KB Output is correct
33 Correct 268 ms 566712 KB Output is correct
34 Correct 282 ms 570312 KB Output is correct
35 Correct 282 ms 570320 KB Output is correct
36 Correct 267 ms 566880 KB Output is correct
37 Correct 289 ms 566724 KB Output is correct
38 Correct 269 ms 566676 KB Output is correct
39 Correct 399 ms 595360 KB Output is correct
40 Correct 284 ms 567320 KB Output is correct
41 Correct 279 ms 571788 KB Output is correct
42 Correct 282 ms 568260 KB Output is correct
43 Correct 285 ms 570500 KB Output is correct
44 Correct 325 ms 578528 KB Output is correct
45 Correct 311 ms 580872 KB Output is correct
46 Correct 325 ms 598196 KB Output is correct
47 Correct 383 ms 595364 KB Output is correct
48 Correct 368 ms 595360 KB Output is correct
49 Correct 486 ms 628496 KB Output is correct
50 Correct 496 ms 628464 KB Output is correct
51 Correct 395 ms 595916 KB Output is correct
52 Correct 351 ms 595396 KB Output is correct
53 Correct 397 ms 595276 KB Output is correct
54 Correct 249 ms 563916 KB Output is correct
55 Correct 256 ms 563880 KB Output is correct
56 Correct 250 ms 563848 KB Output is correct
57 Correct 262 ms 563904 KB Output is correct
58 Correct 265 ms 563928 KB Output is correct
59 Correct 259 ms 563848 KB Output is correct
60 Correct 262 ms 563856 KB Output is correct
61 Incorrect 260 ms 563912 KB Output isn't correct
62 Halted 0 ms 0 KB -