oj.uz

Submission #892722

# Submission time Handle Problem Language Result Execution time Memory
892722 2023-12-25T18:13:47 Z seriouslyFlawed Mecho (IOI09_mecho) C++17
18 / 100
 1000 ms 6992 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;
    int res = INT_MIN;

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

        if(tab[curr.f][curr.s] == 'D') res = (best[curr.f][curr.s]);

        for(int i = 0; i < 4; 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] == 'G' or tab[x][y] == 'D') 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 (res >= 0);

}

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
18.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2908 KB Output isn't correct
2 Correct 1 ms 2908 KB Output is correct
3 Incorrect 1 ms 2908 KB Output isn't correct
4 Correct 1 ms 2908 KB Output is correct
5 Incorrect 1 ms 2908 KB Output isn't correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 113 ms 6236 KB Output is correct
8 Incorrect 1 ms 2904 KB Output isn't correct
9 Correct 1 ms 2908 KB Output is correct
10 Incorrect 1 ms 2908 KB Output isn't correct
11 Incorrect 1 ms 2908 KB Output isn't correct
12 Incorrect 1 ms 2908 KB Output isn't correct
13 Correct 1 ms 2908 KB Output is correct
14 Correct 1 ms 2908 KB Output is correct
15 Incorrect 1 ms 2908 KB Output isn't correct
16 Incorrect 1 ms 2908 KB Output isn't correct
17 Incorrect 1 ms 2904 KB Output isn't correct
18 Incorrect 1 ms 2916 KB Output isn't correct
19 Incorrect 1 ms 2908 KB Output isn't correct
20 Incorrect 1 ms 2908 KB Output isn't correct
21 Incorrect 1 ms 2908 KB Output isn't correct
22 Incorrect 1 ms 2908 KB Output isn't 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 2996 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 1 ms 2908 KB Output isn't correct
31 Incorrect 2 ms 2908 KB Output isn't correct
32 Incorrect 2 ms 2908 KB Output isn't correct
33 Incorrect 9 ms 3420 KB Output isn't correct
34 Incorrect 16 ms 3600 KB Output isn't correct
35 Incorrect 940 ms 3768 KB Output isn't correct
36 Incorrect 12 ms 3672 KB Output isn't correct
37 Incorrect 19 ms 3800 KB Output isn't correct
38 Execution timed out 1010 ms 4268 KB Time limit exceeded
39 Incorrect 15 ms 3932 KB Output isn't correct
40 Incorrect 24 ms 3932 KB Output isn't correct
41 Execution timed out 1073 ms 4368 KB Time limit exceeded
42 Incorrect 18 ms 4184 KB Output isn't correct
43 Incorrect 33 ms 4188 KB Output isn't correct
44 Execution timed out 1032 ms 4696 KB Time limit exceeded
45 Incorrect 21 ms 4440 KB Output isn't correct
46 Incorrect 39 ms 4500 KB Output isn't correct
47 Execution timed out 1062 ms 4948 KB Time limit exceeded
48 Incorrect 25 ms 4696 KB Output isn't correct
49 Incorrect 43 ms 4700 KB Output isn't correct
50 Execution timed out 1065 ms 5460 KB Time limit exceeded
51 Incorrect 29 ms 4956 KB Output isn't correct
52 Incorrect 49 ms 4956 KB Output isn't correct
53 Execution timed out 1091 ms 5696 KB Time limit exceeded
54 Incorrect 34 ms 5208 KB Output isn't correct
55 Incorrect 58 ms 5208 KB Output isn't correct
56 Execution timed out 1100 ms 5940 KB Time limit exceeded
57 Incorrect 38 ms 5724 KB Output isn't correct
58 Incorrect 67 ms 5788 KB Output isn't correct
59 Execution timed out 1072 ms 6820 KB Time limit exceeded
60 Incorrect 43 ms 5980 KB Output isn't correct
61 Incorrect 73 ms 5980 KB Output isn't correct
62 Execution timed out 1095 ms 6992 KB Time limit exceeded
63 Incorrect 21 ms 5980 KB Output isn't correct
64 Incorrect 107 ms 6192 KB Output isn't correct
65 Incorrect 106 ms 5980 KB Output isn't correct
66 Incorrect 80 ms 5980 KB Output isn't correct
67 Correct 24 ms 5980 KB Output is correct
68 Incorrect 41 ms 6232 KB Output isn't correct
69 Incorrect 38 ms 6232 KB Output isn't correct
70 Incorrect 32 ms 6236 KB Output isn't correct
71 Incorrect 31 ms 6236 KB Output isn't correct
72 Correct 27 ms 6236 KB Output is correct
73 Correct 36 ms 6488 KB Output is correct
74 Correct 234 ms 6616 KB Output is correct
75 Incorrect 269 ms 6488 KB Output isn't correct
76 Incorrect 362 ms 6612 KB Output isn't correct
77 Incorrect 292 ms 6624 KB Output isn't correct
78 Correct 34 ms 6388 KB Output is correct
79 Incorrect 89 ms 6396 KB Output isn't correct
80 Incorrect 69 ms 6568 KB Output isn't correct
81 Incorrect 94 ms 6488 KB Output isn't correct
82 Incorrect 57 ms 6492 KB Output isn't correct
83 Incorrect 107 ms 6492 KB Output isn't correct
84 Incorrect 221 ms 6504 KB Output isn't correct
85 Incorrect 987 ms 6740 KB Output isn't correct
86 Execution timed out 1041 ms 6488 KB Time limit exceeded
87 Incorrect 195 ms 6512 KB Output isn't correct
88 Incorrect 660 ms 6436 KB Output isn't correct
89 Execution timed out 1052 ms 6568 KB Time limit exceeded
90 Incorrect 126 ms 6236 KB Output isn't correct
91 Incorrect 189 ms 6232 KB Output isn't correct
92 Incorrect 123 ms 6236 KB Output isn't correct