oj.uz

Submission #892723

# Submission time Handle Problem Language Result Execution time Memory
892723 2023-12-25T18:18:57 Z seriouslyFlawed Mecho (IOI09_mecho) C++17
17 / 100
 1000 ms 7312 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 = n*n+100;
    while(hi >= lo){
        int mid = (lo + hi )/2;
        if(isViable(mid)) lo = mid + 1;
        else hi = mid-1; 
    }

    cout << (lo-2) << 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
17.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2908 KB Output isn't correct
2 Incorrect 1 ms 2908 KB Output isn't correct
3 Correct 1 ms 2908 KB Output is correct
4 Incorrect 1 ms 2908 KB Output isn't correct
5 Correct 1 ms 2908 KB Output is correct
6 Incorrect 1 ms 2908 KB Output isn't correct
7 Incorrect 120 ms 6352 KB Output isn't correct
8 Incorrect 1 ms 2904 KB Output isn't correct
9 Incorrect 1 ms 2908 KB Output isn't correct
10 Correct 1 ms 2908 KB Output is correct
11 Correct 1 ms 2908 KB Output is correct
12 Incorrect 1 ms 2908 KB Output isn't correct
13 Incorrect 1 ms 2908 KB Output isn't correct
14 Correct 1 ms 2908 KB Output is 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 2908 KB Output isn't correct
20 Correct 1 ms 2908 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 Correct 1 ms 2908 KB Output is correct
25 Incorrect 1 ms 2908 KB Output isn't correct
26 Correct 1 ms 2908 KB Output is correct
27 Incorrect 1 ms 2904 KB Output isn't correct
28 Correct 1 ms 2908 KB Output is correct
29 Incorrect 1 ms 2908 KB Output isn't correct
30 Correct 1 ms 2908 KB Output is correct
31 Incorrect 1 ms 2908 KB Output isn't correct
32 Correct 1 ms 2908 KB Output is correct
33 Incorrect 4 ms 3420 KB Output isn't correct
34 Correct 5 ms 3416 KB Output is correct
35 Correct 950 ms 4024 KB Output is correct
36 Incorrect 5 ms 3676 KB Output isn't correct
37 Correct 6 ms 3800 KB Output is correct
38 Execution timed out 1077 ms 4008 KB Time limit exceeded
39 Incorrect 6 ms 3932 KB Output isn't correct
40 Correct 8 ms 3932 KB Output is correct
41 Execution timed out 1073 ms 4276 KB Time limit exceeded
42 Incorrect 7 ms 4188 KB Output isn't correct
43 Correct 9 ms 4240 KB Output is correct
44 Execution timed out 1048 ms 4592 KB Time limit exceeded
45 Incorrect 8 ms 4440 KB Output isn't correct
46 Correct 11 ms 4444 KB Output is correct
47 Execution timed out 1062 ms 4892 KB Time limit exceeded
48 Incorrect 10 ms 4804 KB Output isn't correct
49 Correct 12 ms 4696 KB Output is correct
50 Execution timed out 1058 ms 5308 KB Time limit exceeded
51 Incorrect 10 ms 4956 KB Output isn't correct
52 Correct 14 ms 4912 KB Output is correct
53 Execution timed out 1046 ms 5820 KB Time limit exceeded
54 Incorrect 12 ms 5212 KB Output isn't correct
55 Correct 17 ms 5212 KB Output is correct
56 Execution timed out 1072 ms 6316 KB Time limit exceeded
57 Incorrect 14 ms 5724 KB Output isn't correct
58 Correct 19 ms 5724 KB Output is correct
59 Execution timed out 1078 ms 6764 KB Time limit exceeded
60 Incorrect 15 ms 5976 KB Output isn't correct
61 Correct 21 ms 5980 KB Output is correct
62 Execution timed out 1077 ms 7312 KB Time limit exceeded
63 Incorrect 22 ms 5976 KB Output isn't correct
64 Incorrect 142 ms 6192 KB Output isn't correct
65 Incorrect 92 ms 6008 KB Output isn't correct
66 Incorrect 78 ms 5980 KB Output isn't correct
67 Correct 23 ms 6232 KB Output is correct
68 Correct 42 ms 6256 KB Output is correct
69 Correct 45 ms 6232 KB Output is correct
70 Correct 36 ms 6480 KB Output is correct
71 Correct 27 ms 6228 KB Output is correct
72 Incorrect 27 ms 6236 KB Output isn't correct
73 Incorrect 41 ms 6616 KB Output isn't correct
74 Incorrect 268 ms 6488 KB Output isn't correct
75 Correct 354 ms 6624 KB Output is correct
76 Correct 361 ms 6612 KB Output is correct
77 Correct 249 ms 6656 KB Output is correct
78 Correct 28 ms 6492 KB Output is correct
79 Incorrect 71 ms 6492 KB Output isn't correct
80 Incorrect 60 ms 6492 KB Output isn't correct
81 Correct 96 ms 6384 KB Output is correct
82 Incorrect 52 ms 6492 KB Output isn't correct
83 Correct 103 ms 6492 KB Output is correct
84 Correct 230 ms 6500 KB Output is correct
85 Correct 884 ms 6580 KB Output is correct
86 Execution timed out 1055 ms 6492 KB Time limit exceeded
87 Correct 193 ms 6740 KB Output is correct
88 Correct 648 ms 6228 KB Output is correct
89 Execution timed out 1027 ms 6436 KB Time limit exceeded
90 Correct 120 ms 6436 KB Output is correct
91 Correct 197 ms 6264 KB Output is correct
92 Correct 144 ms 6232 KB Output is correct