oj.uz

Submission #789654

# Submission time Handle Problem Language Result Execution time Memory
789654 2023-07-21T16:06:45 Z phongcd Mecho (IOI09_mecho) C++14
13 / 100
 316 ms 65536 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long  double
#define ull unsigned long long
#define ii pair <int, int>
#define ill pair <ll, ll>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define file "test"
using namespace std;
const ll N = 8e2 + 2;
const ll MOD = 1e9;
const ll INF = 1e18;
const ll base = 311;
const int BLOCK_SIZE = 2000;
 
int n, s;
ii start, target, d[N][N];
char a[N][N];
int mtime[N][N];
int dx[4] = {-1, 1, 0, 0};
int dy[4] = {0, 0, -1, 1};

void addstep(ii &a) {
    a.se += 1;
    if (a.se > s) a.fi ++, a.se = 1;
}

bool cmp(ii a, ii b) {
    if (a.fi != b.fi) return a.fi < b.fi;
    return a.se < b.se; 
}

bool check(int x) {
    for (int i = 1; i <= n; i ++)
        for (int j = 1; j <= n; j ++) d[i][j] = {2e9, 0};
    
    queue <ii> h;
    h.push(start);
    d[start.fi][start.se] = {x + 1, 0};

    while (!h.empty()) {
        auto [x, y] = h.front(); h.pop();
        ii res = d[x][y];
        addstep(res);

        for (int j = 0; j <= 3; j ++) {
            int u = x + dx[j];
            int v = y + dy[j];
            if (a[u][v] == 'G' && res.fi <= mtime[u][v] && !cmp(d[u][v], res)) {
                h.push({u, v});
                d[u][v] = res;
            }
        }
    }
    return d[target.fi][target.se].fi != 2e9;
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
    cin >> n >> s;
    queue <ii> bee;
    for (int i = 1; i <= n; i ++)
        for (int j = 1; j <= n; j ++) {
            cin >> a[i][j]; 
            mtime[i][j] = 2e9;

            if (a[i][j] == 'H') 
                bee.push({i, j}), mtime[i][j] = 0;

            if (a[i][j] == 'M')
                a[i][j] = 'G', start = {i, j};

            if (a[i][j] == 'D') 
                a[i][j] = 'G', target = {i, j};
        }

    while (!bee.empty()) {
        auto [x, y] = bee.front(); bee.pop();
        int res = mtime[x][y] + 1;

        for (int j = 0; j <= 3; j ++) {
            int u = x + dx[j];
            int v = y + dy[j];
            if (a[u][v] == 'G' && mtime[u][v] > res) {
                bee.push({u, v});
                mtime[u][v] = res;
            }
        }
    }

    int l = 1, r = 2e3;
    while (l < r) {
        int mid = l + (r - l + 1) / 2;
        if (check(mid)) l = mid;
        else r = mid - 1;
    }
    cout << (check(l) ? l : -1);
}
/*
     /\_/\ zzZ
    (= -_-)
    / >u  >u
*/

Compilation message

mecho.cpp: In function 'bool check(int)':
mecho.cpp:44:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   44 |         auto [x, y] = h.front(); h.pop();
      |              ^
mecho.cpp: In function 'int main()':
mecho.cpp:81:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   81 |         auto [x, y] = bee.front(); bee.pop();
      |              ^

Subtask #1
13.0 / 100.0

# 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 Incorrect 1 ms 340 KB Output isn't correct
6 Incorrect 1 ms 340 KB Output isn't correct
7 Runtime error 191 ms 65536 KB Execution killed with signal 9
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 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 Incorrect 0 ms 724 KB Output isn't correct
13 Runtime error 316 ms 65536 KB Execution killed with signal 9
14 Runtime error 265 ms 65536 KB Execution killed with signal 9
15 Incorrect 0 ms 468 KB Output isn't correct
16 Correct 0 ms 468 KB Output is correct
17 Incorrect 0 ms 468 KB Output isn't correct
18 Correct 1 ms 468 KB Output is correct
19 Incorrect 0 ms 468 KB Output isn't correct
20 Correct 1 ms 468 KB Output is correct
21 Incorrect 1 ms 596 KB Output isn't correct
22 Correct 1 ms 596 KB Output is correct
23 Incorrect 1 ms 724 KB Output isn't correct
24 Correct 1 ms 724 KB Output is correct
25 Incorrect 1 ms 724 KB Output isn't correct
26 Correct 1 ms 724 KB Output is correct
27 Incorrect 1 ms 852 KB Output isn't correct
28 Correct 1 ms 852 KB Output is correct
29 Incorrect 1 ms 852 KB Output isn't correct
30 Correct 1 ms 852 KB Output is correct
31 Incorrect 1 ms 980 KB Output isn't correct
32 Correct 1 ms 980 KB Output is correct
33 Incorrect 10 ms 3908 KB Output isn't correct
34 Incorrect 13 ms 3916 KB Output isn't correct
35 Runtime error 209 ms 65536 KB Execution killed with signal 9
36 Incorrect 13 ms 4372 KB Output isn't correct
37 Incorrect 20 ms 4396 KB Output isn't correct
38 Runtime error 189 ms 65536 KB Execution killed with signal 9
39 Incorrect 18 ms 4928 KB Output isn't correct
40 Incorrect 21 ms 4820 KB Output isn't correct
41 Runtime error 190 ms 65536 KB Execution killed with signal 9
42 Incorrect 20 ms 5376 KB Output isn't correct
43 Incorrect 27 ms 5440 KB Output isn't correct
44 Runtime error 182 ms 65536 KB Execution killed with signal 9
45 Incorrect 24 ms 5948 KB Output isn't correct
46 Incorrect 30 ms 5844 KB Output isn't correct
47 Runtime error 196 ms 65536 KB Execution killed with signal 9
48 Incorrect 28 ms 6460 KB Output isn't correct
49 Incorrect 36 ms 6436 KB Output isn't correct
50 Runtime error 180 ms 65536 KB Execution killed with signal 9
51 Incorrect 33 ms 6868 KB Output isn't correct
52 Incorrect 46 ms 6960 KB Output isn't correct
53 Runtime error 185 ms 65536 KB Execution killed with signal 9
54 Incorrect 41 ms 7364 KB Output isn't correct
55 Incorrect 55 ms 7460 KB Output isn't correct
56 Runtime error 202 ms 65536 KB Execution killed with signal 9
57 Incorrect 50 ms 7892 KB Output isn't correct
58 Incorrect 56 ms 7968 KB Output isn't correct
59 Runtime error 181 ms 65536 KB Execution killed with signal 9
60 Incorrect 51 ms 8476 KB Output isn't correct
61 Incorrect 62 ms 8404 KB Output isn't correct
62 Runtime error 200 ms 65536 KB Execution killed with signal 9
63 Incorrect 90 ms 8592 KB Output isn't correct
64 Correct 154 ms 8456 KB Output is correct
65 Correct 161 ms 8484 KB Output is correct
66 Incorrect 121 ms 8464 KB Output isn't correct
67 Correct 98 ms 8480 KB Output is correct
68 Incorrect 40 ms 8404 KB Output isn't correct
69 Correct 43 ms 8508 KB Output is correct
70 Correct 39 ms 8476 KB Output is correct
71 Correct 36 ms 8504 KB Output is correct
72 Incorrect 29 ms 8508 KB Output isn't correct
73 Runtime error 181 ms 65536 KB Execution killed with signal 9
74 Runtime error 207 ms 65536 KB Execution killed with signal 9
75 Runtime error 177 ms 65536 KB Execution killed with signal 9
76 Runtime error 176 ms 65536 KB Execution killed with signal 9
77 Runtime error 202 ms 65536 KB Execution killed with signal 9
78 Runtime error 187 ms 65536 KB Execution killed with signal 9
79 Runtime error 191 ms 65536 KB Execution killed with signal 9
80 Runtime error 193 ms 65536 KB Execution killed with signal 9
81 Runtime error 178 ms 65536 KB Execution killed with signal 9
82 Runtime error 182 ms 65536 KB Execution killed with signal 9
83 Runtime error 195 ms 65536 KB Execution killed with signal 9
84 Runtime error 194 ms 65536 KB Execution killed with signal 9
85 Runtime error 189 ms 65536 KB Execution killed with signal 9
86 Runtime error 181 ms 65536 KB Execution killed with signal 9
87 Runtime error 201 ms 65536 KB Execution killed with signal 9
88 Runtime error 192 ms 65536 KB Execution killed with signal 9
89 Runtime error 178 ms 65536 KB Execution killed with signal 9
90 Runtime error 186 ms 65536 KB Execution killed with signal 9
91 Runtime error 186 ms 65536 KB Execution killed with signal 9
92 Runtime error 179 ms 65536 KB Execution killed with signal 9