oj.uz

Submission #892710

# Submission time Handle Problem Language Result Execution time Memory
892710 2023-12-25T17:48:11 Z seriouslyFlawed Mecho (IOI09_mecho) C++17
9 / 100
 1000 ms 7788 KB 
#include <bits/stdc++.h>

using namespace std;

// Shortcuts for common operations
#define pb push_back
#define ppb pop_back
#define f first
#define s second
#define all(x) (x).begin(), (x).end()
#define ll long long
#define endl "\n"

// Type definitions for convenience
typedef vector<int> vi;
typedef vector<bool> vb;
typedef pair<int, int> pii;
typedef vector<vi> vvi;
typedef vector<pii> vii;
typedef unordered_set<int> usi;
typedef unordered_map<int, int> umii;

// Debugging macros
#define debug(x) cerr << #x << " = " << (x) << '\n'
#define debug_vector(v) _debug_vector(#v, v)
template<typename T>
void _debug_vector(const string& name, const vector<T>& a) {
    cerr << name << " = [ ";
    for(const auto &x : a) cerr << x << ' ';
    cerr << "]\n";
}

// I/O redirection for local testing
#define iofile(io) \
        freopen((io + ".in").c_str(), "r", stdin); \
        freopen((io + ".out").c_str(), "w", stdout);

// delta for floodfill
vi dx = {0, 1, 0, -1};
vi dy = {1, 0, -1, 0};

// extended deltas for floodfill
vi edx = {0, 1, 0, -1, 1, 1, -1, -1};
vi edy = {1, 0, -1, 0, 1, -1, 1, -1};

// Common outputs
void yes() { cout << "YES" << '\n'; }
void no() { cout << "NO" << '\n'; }

// cin.tie(0)->sync_with_stdio(0);
vvi bee;
vector<string>tab;
int n, k;
pii start;
int best[801][801];

bool isViable(int target){
    if(bee[start.f][start.s] <= target) return false;

    memset(best, -1, sizeof best);
    queue<pair<pii, pii>>q;
    q.push({{target, k}, start});
    best[start.f][start.s] = bee[start.f][start.s] - target;

    while(!q.empty()){
        auto [T, curr] = q.front();
        auto [t, steps] = T;
        q.pop();

        if(tab[curr.f][curr.s] == 'D') return (best[curr.f][curr.s] >= 0);

        for(int i = 0; i < n; i++){
            auto [x, y] = make_pair(curr.f + dx[i], curr.s + dy[i]);
            if(x >= 0 and x < n and y >= 0 and y < n and tab[x][y] != 'T' and bee[x][y] > (steps?t:t+1) and best[x][y] < min(best[curr.f][curr.s], bee[x][y] - (steps?t:t+1))){
                best[x][y] = min(best[curr.f][curr.s], bee[x][y] - (steps?t:t+1));
                q.push({{(steps)?t:t+1, (steps?steps-1:k-1)}, {x, y}});
            }
        }
    }

    return false;

}

void fx() {
    // Functionality for fx
    cin >> n >> k;

    tab.assign(n, "");
    bee.assign(n, vi(n, INT_MAX));
    vii hives;

    for(int i = 0; i < n; i++){
        cin >> tab[i];
        for(int j = 0; j < n; j++){
            if(tab[i][j] == 'M') start = {i, j};
            else if(tab[i][j] == 'H') hives.pb({i, j});
        }
    }

    queue<pair<int, pii>>q;
    for(auto &hive: hives){
        q.push({0, hive});
        bee[hive.f][hive.s] = 0;
    }

    while(!q.empty()){
        auto &[t, hive] = q.front();
        q.pop();
        auto &[x, y] = hive;
        
        for(int i = 0; i < 4; i++){
            auto [X, Y] = make_pair(x+dx[i], y+dy[i]);
            if(X >= 0 and X < n and Y >= 0 and Y < n and (tab[X][Y] == 'G' or tab[X][Y] == 'M' or tab[X][Y] == 'D') and bee[X][Y] > t + 1){
                q.push({t+1, {X, Y}});
                bee[X][Y] = t+1;
            }
        }
    }

    if(!isViable(0)){
        cout << "-1" << endl;
        return;
    }

    int lo = 0;
    int hi = 805;
    while(hi > lo){
        int mid = (lo + hi +1)/2;
        if(isViable(mid)) lo = mid;
        else hi = mid-1; 
    }

    cout << lo << endl;
}

int main() {
    // Uncomment the following lines for file I/O
    // iofile(string("hello"))
    cin.tie(0)->sync_with_stdio(0);

    
    // Uncomment the following lines for multiple test cases
    // int t; cin >> t;
    // while(t--) fx();
    
    // Single test case
    fx();
    
    return 0;
}

Subtask #1
9.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2904 KB Output isn't correct
2 Incorrect 1 ms 2904 KB Output isn't correct
3 Incorrect 1 ms 2908 KB Output isn't correct
4 Incorrect 1 ms 2908 KB Output isn't correct
5 Correct 1 ms 2828 KB Output is correct
6 Incorrect 1 ms 2908 KB Output isn't correct
7 Execution timed out 1088 ms 6176 KB Time limit exceeded
8 Incorrect 1 ms 2904 KB Output isn't correct
9 Correct 1 ms 2908 KB Output is correct
10 Correct 1 ms 2928 KB Output is correct
11 Correct 1 ms 2904 KB Output is correct
12 Incorrect 1 ms 2908 KB Output isn't correct
13 Correct 1 ms 3000 KB Output is correct
14 Incorrect 4 ms 2908 KB Output isn't correct
15 Incorrect 1 ms 2908 KB Output isn't correct
16 Correct 1 ms 2908 KB Output is correct
17 Incorrect 1 ms 2908 KB Output isn't correct
18 Correct 1 ms 2908 KB Output is correct
19 Incorrect 1 ms 2904 KB Output isn't correct
20 Correct 1 ms 3108 KB Output is correct
21 Incorrect 1 ms 2908 KB Output isn't correct
22 Correct 1 ms 2908 KB Output is correct
23 Incorrect 1 ms 2908 KB Output isn't correct
24 Incorrect 1 ms 2908 KB Output isn't correct
25 Incorrect 1 ms 2908 KB Output isn't correct
26 Incorrect 1 ms 2908 KB Output isn't correct
27 Incorrect 1 ms 2908 KB Output isn't correct
28 Incorrect 2 ms 2908 KB Output isn't correct
29 Incorrect 1 ms 2908 KB Output isn't correct
30 Incorrect 2 ms 2904 KB Output isn't correct
31 Incorrect 1 ms 2908 KB Output isn't correct
32 Incorrect 2 ms 2908 KB Output isn't correct
33 Incorrect 3 ms 3420 KB Output isn't correct
34 Incorrect 8 ms 3608 KB Output isn't correct
35 Execution timed out 1092 ms 3756 KB Time limit exceeded
36 Incorrect 3 ms 3676 KB Output isn't correct
37 Incorrect 12 ms 3764 KB Output isn't correct
38 Execution timed out 1050 ms 3932 KB Time limit exceeded
39 Incorrect 4 ms 3928 KB Output isn't correct
40 Incorrect 19 ms 3932 KB Output isn't correct
41 Execution timed out 1077 ms 4180 KB Time limit exceeded
42 Incorrect 5 ms 4184 KB Output isn't correct
43 Incorrect 24 ms 4188 KB Output isn't correct
44 Execution timed out 1071 ms 4868 KB Time limit exceeded
45 Incorrect 5 ms 4440 KB Output isn't correct
46 Incorrect 32 ms 4504 KB Output isn't correct
47 Execution timed out 1060 ms 5192 KB Time limit exceeded
48 Incorrect 6 ms 4700 KB Output isn't correct
49 Incorrect 48 ms 4784 KB Output isn't correct
50 Execution timed out 1061 ms 5228 KB Time limit exceeded
51 Incorrect 6 ms 4952 KB Output isn't correct
52 Incorrect 57 ms 4952 KB Output isn't correct
53 Execution timed out 1046 ms 5976 KB Time limit exceeded
54 Incorrect 7 ms 5212 KB Output isn't correct
55 Incorrect 71 ms 5432 KB Output isn't correct
56 Execution timed out 1035 ms 6560 KB Time limit exceeded
57 Incorrect 8 ms 5724 KB Output isn't correct
58 Incorrect 89 ms 5792 KB Output isn't correct
59 Execution timed out 1072 ms 6740 KB Time limit exceeded
60 Incorrect 13 ms 5976 KB Output isn't correct
61 Incorrect 116 ms 6184 KB Output isn't correct
62 Execution timed out 1070 ms 7508 KB Time limit exceeded
63 Incorrect 57 ms 5980 KB Output isn't correct
64 Incorrect 59 ms 6192 KB Output isn't correct
65 Incorrect 56 ms 5980 KB Output isn't correct
66 Incorrect 71 ms 6228 KB Output isn't correct
67 Incorrect 65 ms 6192 KB Output isn't correct
68 Incorrect 66 ms 6228 KB Output isn't correct
69 Incorrect 58 ms 6232 KB Output isn't correct
70 Incorrect 58 ms 6232 KB Output isn't correct
71 Incorrect 52 ms 6236 KB Output isn't correct
72 Correct 97 ms 6236 KB Output is correct
73 Execution timed out 1063 ms 7144 KB Time limit exceeded
74 Execution timed out 1068 ms 7648 KB Time limit exceeded
75 Execution timed out 1034 ms 7512 KB Time limit exceeded
76 Execution timed out 1064 ms 7412 KB Time limit exceeded
77 Execution timed out 1016 ms 7788 KB Time limit exceeded
78 Execution timed out 1026 ms 6480 KB Time limit exceeded
79 Execution timed out 1075 ms 6492 KB Time limit exceeded
80 Execution timed out 1044 ms 6492 KB Time limit exceeded
81 Execution timed out 1070 ms 6492 KB Time limit exceeded
82 Execution timed out 1059 ms 6492 KB Time limit exceeded
83 Execution timed out 1059 ms 6492 KB Time limit exceeded
84 Execution timed out 1036 ms 6328 KB Time limit exceeded
85 Execution timed out 1061 ms 6492 KB Time limit exceeded
86 Execution timed out 1050 ms 6488 KB Time limit exceeded
87 Execution timed out 1069 ms 6492 KB Time limit exceeded
88 Execution timed out 1055 ms 6232 KB Time limit exceeded
89 Execution timed out 1031 ms 6228 KB Time limit exceeded
90 Execution timed out 1053 ms 6236 KB Time limit exceeded
91 Execution timed out 1020 ms 6232 KB Time limit exceeded
92 Execution timed out 1053 ms 6236 KB Time limit exceeded