oj.uz

Submission #953287

# Submission time Handle Problem Language Result Execution time Memory
953287 2024-03-25T19:23:03 Z snowman Mecho (IOI09_mecho) C++17
35 / 100
 262 ms 6872 KB 
#include <bits/stdc++.h>
using namespace std;
//Soltan Cristian
#define ll long long
#define all(x) x.begin(), x.end()
#define mod 1000000007
#define pb push_back
#define st first
#define nd second
#define sz(x) (ll)x.size()
#define rall(x) x.rbegin(), x.rend()

const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};

const int mxa = 2 * 1e5 + 2;
// string __fname = "maxflow";  
// ifstream in(__fname + ".in"); 
// ofstream out (__fname + ".out"); 
// #define cin in 
// #define cout out
int n, s;
vector<vector<char>> mapa;

bool validB(int x, int y){
    if(x >= 0 && x < n && y >= 0 && y < n && mapa[x][y] != 'T' && mapa[x][y] != 'D'){
        return true;
    }
    return false;
}

bool valid(int x, int y){
    if(x >= 0 && x < n && y >= 0 && y < n && mapa[x][y] != 'T'){
        return true;
    }
    return false;
}


void solve(){
    cin >> n >> s;
    mapa = vector<vector<char>>(n, vector<char>(n));
    vector<pair<int,int>> stup;
    pair<int, int> start, finish;
    for(int i = 0; i < n; i++){
        for(int j = 0; j < n; j++){
            char x;
            cin >> x;
            if(x == 'H') stup.pb({i, j});
            if(x == 'M') start = {i, j};
            if(x == 'D') finish = {i, j};
            mapa[i][j] = x;
        }
    }
    vector<vector<int>> bees(n, vector<int>(n, INT_MAX));
    queue<pair<int, int>> qB;
    for(int i = 0; i < sz(stup); i++){
        bees[stup[i].st][stup[i].nd] = 0;
        qB.push({stup[i].st, stup[i].nd});
    }
    // cout << "a\n";
    while(!qB.empty()){
        pair<int, int> u = qB.front();
        qB.pop();
        for(int i = 0; i < 4; i++){
            if(!validB(u.st + dx[i], u.nd + dy[i])) continue;
            if(bees[u.st][u.nd] + s < bees[u.st + dx[i]][u.nd + dy[i]]){
                qB.push({u.st + dx[i], u.nd + dy[i]});
                bees[u.st + dx[i]][u.nd + dy[i]] = bees[u.st][u.nd] + s;
            }
        }
    }

    int l = 0, r = 2 * n * n;
    int ans = 0;
    while(l <= r){
        int mid = (l + r) / 2;
        vector<vector<int>> h(n, vector<int>(n, INT_MAX));
        h[start.st][start.nd] = mid;
        queue<pair<int,int>> q;
        q.push({start.st, start.nd});
        while(!q.empty()){
            pair<int, int> u = q.front();
            q.pop();
            for(int i = 0; i < 4; i++){
                if(!valid(u.st + dx[i], u.nd + dy[i])) continue;
                if(h[u.st][u.nd] + 1 < bees[u.st + dx[i]][u.nd + dy[i]] && 
                            h[u.st][u.nd] + 1 < h[u.st + dx[i]][u.nd + dy[i]]){
                    q.push({u.st + dx[i], u.nd + dy[i]});
                    h[u.st + dx[i]][u.nd + dy[i]] = h[u.st][u.nd] + 1;
                }
            }
        }
        if(h[finish.st][finish.nd] < INT_MAX){
            ans = max(ans, mid);
            l = mid + 1;
        }
        else r = mid - 1;
    }
    // cout << ans << '\n';
    cout << ans / s << '\n';


}
 
 
int main()
{   
    // ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed  << (setprecision(10)); 
    // int t;
    // cin >> t;
    // while(t--)
        solve();
    return 0;
}

Subtask #1
35.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 356 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 135 ms 6356 KB Output is correct
8 Incorrect 0 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 Incorrect 1 ms 348 KB Output isn't correct
14 Incorrect 1 ms 344 KB Output isn't correct
15 Correct 0 ms 348 KB Output is correct
16 Incorrect 1 ms 348 KB Output isn't correct
17 Correct 0 ms 348 KB Output is correct
18 Incorrect 0 ms 348 KB Output isn't correct
19 Correct 0 ms 348 KB Output is correct
20 Incorrect 0 ms 348 KB Output isn't correct
21 Correct 1 ms 348 KB Output is correct
22 Incorrect 1 ms 348 KB Output isn't correct
23 Correct 1 ms 344 KB Output is correct
24 Incorrect 1 ms 600 KB Output isn't correct
25 Correct 1 ms 348 KB Output is correct
26 Incorrect 1 ms 468 KB Output isn't correct
27 Correct 1 ms 348 KB Output is correct
28 Incorrect 1 ms 344 KB Output isn't correct
29 Correct 1 ms 348 KB Output is correct
30 Incorrect 1 ms 348 KB Output isn't correct
31 Correct 1 ms 348 KB Output is correct
32 Incorrect 1 ms 348 KB Output isn't correct
33 Correct 9 ms 1544 KB Output is correct
34 Incorrect 25 ms 1548 KB Output isn't correct
35 Correct 36 ms 1668 KB Output is correct
36 Correct 11 ms 1884 KB Output is correct
37 Incorrect 35 ms 1896 KB Output isn't correct
38 Correct 53 ms 1880 KB Output is correct
39 Correct 14 ms 2264 KB Output is correct
40 Incorrect 42 ms 2244 KB Output isn't correct
41 Correct 62 ms 2432 KB Output is correct
42 Correct 21 ms 2688 KB Output is correct
43 Incorrect 58 ms 2668 KB Output isn't correct
44 Correct 79 ms 2888 KB Output is correct
45 Correct 21 ms 3120 KB Output is correct
46 Incorrect 66 ms 3384 KB Output isn't correct
47 Correct 92 ms 3372 KB Output is correct
48 Correct 32 ms 3716 KB Output is correct
49 Incorrect 78 ms 3680 KB Output isn't correct
50 Correct 116 ms 3848 KB Output is correct
51 Correct 30 ms 4176 KB Output is correct
52 Incorrect 95 ms 4188 KB Output isn't correct
53 Correct 131 ms 4564 KB Output is correct
54 Correct 37 ms 4880 KB Output is correct
55 Incorrect 111 ms 5092 KB Output isn't correct
56 Correct 170 ms 5140 KB Output is correct
57 Correct 42 ms 5460 KB Output is correct
58 Incorrect 127 ms 5676 KB Output isn't correct
59 Correct 186 ms 5832 KB Output is correct
60 Correct 46 ms 6244 KB Output is correct
61 Incorrect 160 ms 6464 KB Output isn't correct
62 Correct 225 ms 6556 KB Output is correct
63 Correct 118 ms 6152 KB Output is correct
64 Correct 262 ms 6344 KB Output is correct
65 Correct 162 ms 6188 KB Output is correct
66 Correct 149 ms 6160 KB Output is correct
67 Incorrect 130 ms 6152 KB Output isn't correct
68 Correct 99 ms 6316 KB Output is correct
69 Correct 89 ms 6208 KB Output is correct
70 Correct 69 ms 6292 KB Output is correct
71 Correct 64 ms 6216 KB Output is correct
72 Incorrect 57 ms 6224 KB Output isn't correct
73 Incorrect 83 ms 6664 KB Output isn't correct
74 Correct 135 ms 6612 KB Output is correct
75 Correct 106 ms 6676 KB Output is correct
76 Correct 94 ms 6684 KB Output is correct
77 Correct 106 ms 6660 KB Output is correct
78 Incorrect 111 ms 6636 KB Output isn't correct
79 Correct 101 ms 6640 KB Output is correct
80 Correct 107 ms 6572 KB Output is correct
81 Correct 105 ms 6616 KB Output is correct
82 Correct 95 ms 6612 KB Output is correct
83 Correct 111 ms 6664 KB Output is correct
84 Correct 124 ms 6524 KB Output is correct
85 Correct 108 ms 6652 KB Output is correct
86 Correct 113 ms 6664 KB Output is correct
87 Correct 128 ms 6872 KB Output is correct
88 Correct 125 ms 6624 KB Output is correct
89 Correct 144 ms 6560 KB Output is correct
90 Correct 127 ms 6864 KB Output is correct
91 Correct 136 ms 6612 KB Output is correct
92 Correct 121 ms 6660 KB Output is correct