Submission #953979

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
953979	2024-03-27T03:43:16 Z	Github	Mecho (IOI09_mecho)	C++17	46 / 100	141 ms	46164 KB

mecho

#include <iostream>
#include <vector>
#include <queue>
#include <cstring>
#include <map>
#include <climits>
#include <cmath>
#include <algorithm>
#include <stack>
using namespace std;

#define speedup ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define ll long long

const ll MAXN = 810;
ll bee[MAXN][MAXN];
ll dist[MAXN][MAXN];
pair<ll,ll> parent[MAXN][MAXN];
bool vis[MAXN][MAXN];
ll dX[] = {1, -1, 0, 0};
ll dY[] = {0, 0, 1, -1};
pair<ll, ll> mencho, den;
vector<string> grid;
ll n, s;

bool compute(ll k){
    if (k >= bee[mencho.first][mencho.second]){
        return false;
    }
    for (ll i = 0; i < MAXN; i++){
        for (ll j = 0; j < MAXN; j++){
            dist[i][j] = 1e9;
            parent[i][j] = {-1, -1};
            vis[i][j] = false;
        }
    }
    queue<pair<ll, ll>> q;
    q.push(mencho);
    dist[mencho.first][mencho.second] = 0;
    while (!q.empty()){
        ll x = q.front().first, y = q.front().second; q.pop();
        vis[x][y] = true;
        if (make_pair(x, y) == den){
            break;
        }
        for (ll i = 0; i < 4; i++){
            ll nX = x + dX[i], nY = y+dY[i];
            bool b1 = nX < 0 || nX >= n || nY < 0 || nY >= n, b2 = grid[nX][nY] == 'T' || grid[nX][nY] == 'H' || grid[nX][nY] == 'D';
            if (b1){
                continue;
            }
            if (b2){
                continue;
            }
            if (dist[nX][nY] > dist[x][y]+1 && !vis[nX][nY] && (bee[nX][nY]-k) > (dist[x][y]+1)/s){
                dist[nX][nY] = dist[x][y]+1;
                parent[nX][nY] = {x, y};
                q.push({nX, nY});
            }
        }
    }
    for (int i = 0; i < 4; i++){
        ll nX = den.first+dX[i], nY = den.second+dY[i];
        bool b1 = nX < 0 || nX >= n || nY < 0 || nY >= n, b2 = grid[nX][nY] == 'T' || grid[nX][nY] == 'H';
        if (b1) {
            continue;
        }
        if (b2){
            continue;
        }
        if ((bee[nX][nY]-k) > (dist[nX][nY])/s){
            return true;
        }
    }
    return false;
}

int main() {
    speedup
    cin >> n >> s;
    grid.resize(n);
    vector<pair<ll, ll>> start;
    for (ll i = 0; i < n; i++){
        string st; cin >> st;
        grid[i] = st;
        for (ll j = 0; j < n; j++){
            if (st[j] == 'H'){
                start.push_back({i, j});
            }else if (st[j] == 'M'){
                mencho = {i, j};
            }else if (st[j] == 'D'){
                den = {i, j};
            }
        }
    }
    for (ll i = 0; i < MAXN; i++){
        for (ll j = 0; j < MAXN; j++){
            bee[i][j] = 1e9;
            vis[i][j] = false;
        }
    }
    queue<pair<ll, ll>> q;
    for (pair<ll, ll> p: start){
        bee[p.first][p.second] = 0;
        q.push({p.first, p.second});
    }
    while (!q.empty()){
        ll x = q.front().first, y = q.front().second; q.pop();
        vis[x][y] = true;
        for (ll i = 0; i < 4; i++){
            ll nX = x + dX[i], nY = y+dY[i];
            if (nX < 0 || nX >= n || nY < 0 || nY >= n || grid[nX][nY] == 'T' || grid[nX][nY] == 'D'){
                continue;
            }
            if (bee[nX][nY] > bee[x][y]+1 && !vis[nX][nY]){
                bee[nX][nY] = bee[x][y]+1;
                q.push({nX, nY});
            }
        }
    }
    ll l = 0, h = 1e9, mid, ans = -1;
    while (l <= h){
        mid = (l+h)/2;
        if (compute(mid)){
            ans = mid;
            l = mid+1;
        }else{
            h = mid-1;
        }
    }
    cout << ans << endl;
    return 0;
}

Subtask #1

46.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	9 ms	21600 KB	Output is correct
2	Correct	9 ms	21596 KB	Output is correct
3	Correct	8 ms	21596 KB	Output is correct
4	Correct	15 ms	21596 KB	Output is correct
5	Runtime error	21 ms	43480 KB	Execution killed with signal 11
6	Runtime error	23 ms	43356 KB	Execution killed with signal 11
7	Correct	141 ms	22540 KB	Output is correct
8	Runtime error	21 ms	43376 KB	Execution killed with signal 11
9	Runtime error	21 ms	43356 KB	Execution killed with signal 11
10	Runtime error	21 ms	43484 KB	Execution killed with signal 11
11	Runtime error	26 ms	43496 KB	Execution killed with signal 11
12	Correct	8 ms	21596 KB	Output is correct
13	Correct	4 ms	21596 KB	Output is correct
14	Correct	9 ms	21468 KB	Output is correct
15	Correct	9 ms	21596 KB	Output is correct
16	Runtime error	22 ms	43308 KB	Execution killed with signal 11
17	Correct	9 ms	21596 KB	Output is correct
18	Runtime error	22 ms	43356 KB	Execution killed with signal 11
19	Correct	10 ms	21592 KB	Output is correct
20	Runtime error	21 ms	43352 KB	Execution killed with signal 11
21	Correct	10 ms	21636 KB	Output is correct
22	Runtime error	22 ms	43436 KB	Execution killed with signal 11
23	Correct	9 ms	21592 KB	Output is correct
24	Runtime error	21 ms	43500 KB	Execution killed with signal 11
25	Correct	11 ms	21596 KB	Output is correct
26	Runtime error	21 ms	43344 KB	Execution killed with signal 11
27	Correct	8 ms	21596 KB	Output is correct
28	Runtime error	21 ms	43356 KB	Execution killed with signal 11
29	Correct	11 ms	21596 KB	Output is correct
30	Runtime error	21 ms	43352 KB	Execution killed with signal 11
31	Correct	13 ms	21596 KB	Output is correct
32	Runtime error	21 ms	43388 KB	Execution killed with signal 11
33	Correct	21 ms	21592 KB	Output is correct
34	Runtime error	30 ms	44008 KB	Execution killed with signal 11
35	Runtime error	26 ms	43612 KB	Execution killed with signal 11
36	Correct	13 ms	21596 KB	Output is correct
37	Runtime error	25 ms	43860 KB	Execution killed with signal 11
38	Runtime error	24 ms	43856 KB	Execution killed with signal 11
39	Correct	16 ms	21848 KB	Output is correct
40	Runtime error	24 ms	43868 KB	Execution killed with signal 11
41	Runtime error	26 ms	43860 KB	Execution killed with signal 11
42	Correct	12 ms	21852 KB	Output is correct
43	Runtime error	25 ms	43916 KB	Execution killed with signal 11
44	Runtime error	27 ms	44188 KB	Execution killed with signal 11
45	Correct	20 ms	21852 KB	Output is correct
46	Runtime error	25 ms	44116 KB	Execution killed with signal 11
47	Runtime error	28 ms	44124 KB	Execution killed with signal 11
48	Correct	22 ms	21856 KB	Output is correct
49	Runtime error	26 ms	44380 KB	Execution killed with signal 11
50	Runtime error	29 ms	44280 KB	Execution killed with signal 11
51	Correct	21 ms	22108 KB	Output is correct
52	Runtime error	33 ms	44320 KB	Execution killed with signal 11
53	Runtime error	30 ms	44376 KB	Execution killed with signal 11
54	Correct	25 ms	22108 KB	Output is correct
55	Runtime error	27 ms	44636 KB	Execution killed with signal 11
56	Runtime error	32 ms	44624 KB	Execution killed with signal 11
57	Correct	22 ms	22104 KB	Output is correct
58	Runtime error	28 ms	44636 KB	Execution killed with signal 11
59	Runtime error	33 ms	44624 KB	Execution killed with signal 11
60	Correct	21 ms	22104 KB	Output is correct
61	Runtime error	28 ms	44892 KB	Execution killed with signal 11
62	Runtime error	36 ms	44884 KB	Execution killed with signal 11
63	Runtime error	38 ms	44888 KB	Execution killed with signal 11
64	Runtime error	43 ms	44756 KB	Execution killed with signal 11
65	Runtime error	38 ms	44884 KB	Execution killed with signal 11
66	Runtime error	39 ms	44880 KB	Execution killed with signal 11
67	Runtime error	38 ms	44884 KB	Execution killed with signal 11
68	Runtime error	41 ms	44884 KB	Execution killed with signal 11
69	Runtime error	39 ms	44884 KB	Execution killed with signal 11
70	Runtime error	42 ms	45136 KB	Execution killed with signal 11
71	Runtime error	40 ms	44880 KB	Execution killed with signal 11
72	Runtime error	40 ms	44884 KB	Execution killed with signal 11
73	Runtime error	46 ms	45904 KB	Execution killed with signal 11
74	Runtime error	43 ms	45972 KB	Execution killed with signal 11
75	Runtime error	43 ms	46048 KB	Execution killed with signal 11
76	Runtime error	39 ms	46164 KB	Execution killed with signal 11
77	Runtime error	44 ms	45908 KB	Execution killed with signal 11
78	Correct	75 ms	22848 KB	Output is correct
79	Correct	53 ms	22616 KB	Output is correct
80	Correct	67 ms	22844 KB	Output is correct
81	Correct	75 ms	22864 KB	Output is correct
82	Correct	60 ms	22620 KB	Output is correct
83	Correct	99 ms	22760 KB	Output is correct
84	Correct	87 ms	22764 KB	Output is correct
85	Correct	97 ms	22760 KB	Output is correct
86	Correct	118 ms	22764 KB	Output is correct
87	Correct	102 ms	22756 KB	Output is correct
88	Correct	131 ms	22640 KB	Output is correct
89	Correct	105 ms	22656 KB	Output is correct
90	Correct	128 ms	22652 KB	Output is correct
91	Correct	105 ms	22620 KB	Output is correct
92	Correct	141 ms	22648 KB	Output is correct