oj.uz

Submission #892704

# Submission time Handle Problem Language Result Execution time Memory
892704 2023-12-25T17:29:33 Z seriouslyFlawed Mecho (IOI09_mecho) C++17
9 / 100
 1000 ms 6996 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 (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;
            }
        }
    }

    int lo = 0;
    int hi = 801;
    while(hi > lo){
        int mid = (lo + hi +1)/2;
        if(isViable(mid)) lo = mid;
        else hi = mid-1; 
    }

    cout << hi << 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 344 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 1 ms 344 KB Output isn't correct
7 Execution timed out 1068 ms 6244 KB Time limit exceeded
8 Incorrect 0 ms 348 KB Output isn't correct
9 Correct 0 ms 344 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 0 ms 348 KB Output is correct
14 Incorrect 1 ms 348 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 344 KB Output isn't correct
20 Correct 0 ms 348 KB Output is correct
21 Incorrect 0 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 424 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 0 ms 348 KB Output isn't correct
32 Incorrect 1 ms 348 KB Output isn't correct
33 Incorrect 3 ms 1560 KB Output isn't correct
34 Incorrect 6 ms 1572 KB Output isn't correct
35 Incorrect 656 ms 1628 KB Output isn't correct
36 Incorrect 4 ms 1884 KB Output isn't correct
37 Incorrect 9 ms 1920 KB Output isn't correct
38 Execution timed out 1094 ms 2020 KB Time limit exceeded
39 Incorrect 5 ms 2328 KB Output isn't correct
40 Incorrect 14 ms 2140 KB Output isn't correct
41 Execution timed out 1090 ms 2664 KB Time limit exceeded
42 Incorrect 6 ms 2748 KB Output isn't correct
43 Incorrect 17 ms 2736 KB Output isn't correct
44 Execution timed out 1095 ms 2800 KB Time limit exceeded
45 Incorrect 7 ms 3208 KB Output isn't correct
46 Incorrect 25 ms 3160 KB Output isn't correct
47 Execution timed out 1072 ms 3556 KB Time limit exceeded
48 Incorrect 8 ms 3736 KB Output isn't correct
49 Incorrect 31 ms 3740 KB Output isn't correct
50 Execution timed out 1036 ms 3920 KB Time limit exceeded
51 Incorrect 10 ms 4188 KB Output isn't correct
52 Incorrect 46 ms 4268 KB Output isn't correct
53 Execution timed out 1054 ms 4484 KB Time limit exceeded
54 Incorrect 11 ms 4860 KB Output isn't correct
55 Incorrect 52 ms 4908 KB Output isn't correct
56 Execution timed out 1016 ms 5316 KB Time limit exceeded
57 Incorrect 13 ms 5548 KB Output isn't correct
58 Incorrect 66 ms 5512 KB Output isn't correct
59 Execution timed out 1081 ms 5716 KB Time limit exceeded
60 Incorrect 14 ms 6248 KB Output isn't correct
61 Incorrect 71 ms 6240 KB Output isn't correct
62 Execution timed out 1038 ms 6488 KB Time limit exceeded
63 Incorrect 48 ms 6224 KB Output isn't correct
64 Incorrect 48 ms 6192 KB Output isn't correct
65 Incorrect 48 ms 6212 KB Output isn't correct
66 Incorrect 49 ms 6272 KB Output isn't correct
67 Incorrect 49 ms 6232 KB Output isn't correct
68 Incorrect 59 ms 6220 KB Output isn't correct
69 Incorrect 54 ms 6236 KB Output isn't correct
70 Incorrect 53 ms 6236 KB Output isn't correct
71 Incorrect 51 ms 6256 KB Output isn't correct
72 Correct 52 ms 6236 KB Output is correct
73 Correct 741 ms 6996 KB Output is correct
74 Execution timed out 1067 ms 6340 KB Time limit exceeded
75 Execution timed out 1048 ms 6352 KB Time limit exceeded
76 Execution timed out 1070 ms 6408 KB Time limit exceeded
77 Execution timed out 1045 ms 6236 KB Time limit exceeded
78 Execution timed out 1046 ms 6232 KB Time limit exceeded
79 Execution timed out 1062 ms 6480 KB Time limit exceeded
80 Execution timed out 1059 ms 6236 KB Time limit exceeded
81 Execution timed out 1045 ms 6280 KB Time limit exceeded
82 Execution timed out 1045 ms 6232 KB Time limit exceeded
83 Execution timed out 1060 ms 6248 KB Time limit exceeded
84 Execution timed out 1043 ms 6248 KB Time limit exceeded
85 Execution timed out 1037 ms 6248 KB Time limit exceeded
86 Execution timed out 1004 ms 6240 KB Time limit exceeded
87 Execution timed out 1041 ms 6244 KB Time limit exceeded
88 Execution timed out 1022 ms 6240 KB Time limit exceeded
89 Execution timed out 1046 ms 6236 KB Time limit exceeded
90 Execution timed out 1059 ms 6236 KB Time limit exceeded
91 Execution timed out 1034 ms 6332 KB Time limit exceeded
92 Execution timed out 1026 ms 6412 KB Time limit exceeded