oj.uz

Submission #892706

# Submission time Handle Problem Language Result Execution time Memory
892706 2023-12-25T17:35:13 Z seriouslyFlawed Mecho (IOI09_mecho) C++17
9 / 100
 1000 ms 7132 KB 
#pragma GCC optimize("03,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#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;


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

    vvi best(n, vi(n, INT_MIN));
    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] < (bee[x][y] - (steps?t:t+1))){
                best[x][y] = 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 0 ms 348 KB Output isn't correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Correct 0 ms 348 KB Output is correct
6 Incorrect 0 ms 348 KB Output isn't correct
7 Execution timed out 1091 ms 6236 KB Time limit exceeded
8 Incorrect 1 ms 348 KB Output isn't correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 1 ms 348 KB Output isn't correct
13 Correct 1 ms 348 KB Output is correct
14 Incorrect 1 ms 360 KB Output isn't correct
15 Incorrect 0 ms 348 KB Output isn't correct
16 Correct 0 ms 348 KB Output is correct
17 Incorrect 0 ms 348 KB Output isn't correct
18 Correct 0 ms 348 KB Output is correct
19 Incorrect 1 ms 348 KB Output isn't correct
20 Correct 0 ms 348 KB Output is correct
21 Incorrect 1 ms 348 KB Output isn't correct
22 Correct 0 ms 348 KB Output is correct
23 Incorrect 0 ms 348 KB Output isn't correct
24 Incorrect 0 ms 348 KB Output isn't correct
25 Incorrect 0 ms 348 KB Output isn't correct
26 Incorrect 1 ms 348 KB Output isn't correct
27 Incorrect 0 ms 348 KB Output isn't correct
28 Incorrect 1 ms 348 KB Output isn't correct
29 Incorrect 0 ms 348 KB Output isn't correct
30 Incorrect 1 ms 348 KB Output isn't correct
31 Incorrect 1 ms 348 KB Output isn't correct
32 Incorrect 1 ms 348 KB Output isn't correct
33 Incorrect 3 ms 1572 KB Output isn't correct
34 Incorrect 7 ms 1372 KB Output isn't correct
35 Incorrect 698 ms 1640 KB Output isn't correct
36 Incorrect 4 ms 1884 KB Output isn't correct
37 Incorrect 9 ms 1884 KB Output isn't correct
38 Execution timed out 1090 ms 2020 KB Time limit exceeded
39 Incorrect 5 ms 2248 KB Output isn't correct
40 Incorrect 15 ms 2388 KB Output isn't correct
41 Execution timed out 1030 ms 2412 KB Time limit exceeded
42 Incorrect 6 ms 2700 KB Output isn't correct
43 Incorrect 18 ms 2728 KB Output isn't correct
44 Execution timed out 1041 ms 3308 KB Time limit exceeded
45 Incorrect 7 ms 3208 KB Output isn't correct
46 Incorrect 28 ms 3172 KB Output isn't correct
47 Execution timed out 1077 ms 3592 KB Time limit exceeded
48 Incorrect 8 ms 3740 KB Output isn't correct
49 Incorrect 34 ms 3752 KB Output isn't correct
50 Execution timed out 1095 ms 4088 KB Time limit exceeded
51 Incorrect 10 ms 4188 KB Output isn't correct
52 Incorrect 50 ms 4584 KB Output isn't correct
53 Execution timed out 1068 ms 4548 KB Time limit exceeded
54 Incorrect 12 ms 4860 KB Output isn't correct
55 Incorrect 51 ms 4884 KB Output isn't correct
56 Execution timed out 1054 ms 5216 KB Time limit exceeded
57 Incorrect 14 ms 5532 KB Output isn't correct
58 Incorrect 72 ms 5536 KB Output isn't correct
59 Execution timed out 1043 ms 6148 KB Time limit exceeded
60 Incorrect 15 ms 6256 KB Output isn't correct
61 Incorrect 75 ms 6268 KB Output isn't correct
62 Execution timed out 1049 ms 6740 KB Time limit exceeded
63 Incorrect 51 ms 6232 KB Output isn't correct
64 Incorrect 51 ms 6196 KB Output isn't correct
65 Incorrect 61 ms 6236 KB Output isn't correct
66 Incorrect 58 ms 6224 KB Output isn't correct
67 Incorrect 54 ms 6220 KB Output isn't correct
68 Incorrect 55 ms 6232 KB Output isn't correct
69 Incorrect 48 ms 6236 KB Output isn't correct
70 Incorrect 49 ms 6236 KB Output isn't correct
71 Incorrect 45 ms 6232 KB Output isn't correct
72 Correct 78 ms 6232 KB Output is correct
73 Execution timed out 1041 ms 7072 KB Time limit exceeded
74 Execution timed out 1065 ms 6916 KB Time limit exceeded
75 Execution timed out 1045 ms 6768 KB Time limit exceeded
76 Execution timed out 1028 ms 6736 KB Time limit exceeded
77 Execution timed out 1059 ms 7132 KB Time limit exceeded
78 Execution timed out 1036 ms 6224 KB Time limit exceeded
79 Execution timed out 1065 ms 6236 KB Time limit exceeded
80 Execution timed out 1057 ms 6216 KB Time limit exceeded
81 Execution timed out 1081 ms 6260 KB Time limit exceeded
82 Execution timed out 1066 ms 6236 KB Time limit exceeded
83 Execution timed out 1072 ms 6236 KB Time limit exceeded
84 Execution timed out 1057 ms 6236 KB Time limit exceeded
85 Execution timed out 1067 ms 6236 KB Time limit exceeded
86 Execution timed out 1073 ms 6236 KB Time limit exceeded
87 Execution timed out 1066 ms 6236 KB Time limit exceeded
88 Execution timed out 1071 ms 6240 KB Time limit exceeded
89 Execution timed out 1045 ms 6240 KB Time limit exceeded
90 Execution timed out 1016 ms 6232 KB Time limit exceeded
91 Execution timed out 1024 ms 6232 KB Time limit exceeded
92 Execution timed out 1025 ms 6500 KB Time limit exceeded