Submission #953980

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
953980	2024-03-27T03:44:22 Z	Github	Mecho (IOI09_mecho)	C++17	46 / 100	121 ms	46172 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 || 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 || 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	5 ms	21592 KB	Output is correct
2	Correct	6 ms	21592 KB	Output is correct
3	Correct	5 ms	21592 KB	Output is correct
4	Correct	6 ms	21596 KB	Output is correct
5	Runtime error	22 ms	43348 KB	Execution killed with signal 11
6	Runtime error	23 ms	43352 KB	Execution killed with signal 11
7	Correct	103 ms	22312 KB	Output is correct
8	Runtime error	23 ms	43352 KB	Execution killed with signal 11
9	Runtime error	22 ms	43472 KB	Execution killed with signal 11
10	Runtime error	21 ms	43352 KB	Execution killed with signal 11
11	Runtime error	22 ms	43356 KB	Execution killed with signal 11
12	Correct	8 ms	21592 KB	Output is correct
13	Correct	4 ms	21596 KB	Output is correct
14	Correct	8 ms	21596 KB	Output is correct
15	Correct	8 ms	21596 KB	Output is correct
16	Runtime error	21 ms	43308 KB	Execution killed with signal 11
17	Correct	9 ms	21596 KB	Output is correct
18	Runtime error	21 ms	43352 KB	Execution killed with signal 11
19	Correct	9 ms	21592 KB	Output is correct
20	Runtime error	21 ms	43436 KB	Execution killed with signal 11
21	Correct	10 ms	21592 KB	Output is correct
22	Runtime error	22 ms	43516 KB	Execution killed with signal 11
23	Correct	8 ms	21596 KB	Output is correct
24	Runtime error	22 ms	43424 KB	Execution killed with signal 11
25	Correct	11 ms	21596 KB	Output is correct
26	Runtime error	21 ms	43504 KB	Execution killed with signal 11
27	Correct	8 ms	21848 KB	Output is correct
28	Runtime error	23 ms	43356 KB	Execution killed with signal 11
29	Correct	9 ms	21592 KB	Output is correct
30	Runtime error	21 ms	43356 KB	Execution killed with signal 11
31	Correct	12 ms	21596 KB	Output is correct
32	Runtime error	22 ms	43504 KB	Execution killed with signal 11
33	Correct	17 ms	21596 KB	Output is correct
34	Runtime error	29 ms	43604 KB	Execution killed with signal 11
35	Runtime error	24 ms	43612 KB	Execution killed with signal 11
36	Correct	13 ms	21824 KB	Output is correct
37	Runtime error	23 ms	43868 KB	Execution killed with signal 11
38	Runtime error	25 ms	43868 KB	Execution killed with signal 11
39	Correct	17 ms	21852 KB	Output is correct
40	Runtime error	23 ms	43860 KB	Execution killed with signal 11
41	Runtime error	25 ms	43860 KB	Execution killed with signal 11
42	Correct	12 ms	21852 KB	Output is correct
43	Runtime error	25 ms	44148 KB	Execution killed with signal 11
44	Runtime error	27 ms	43888 KB	Execution killed with signal 11
45	Correct	18 ms	21852 KB	Output is correct
46	Runtime error	25 ms	44124 KB	Execution killed with signal 11
47	Runtime error	27 ms	44120 KB	Execution killed with signal 11
48	Correct	20 ms	22024 KB	Output is correct
49	Runtime error	26 ms	44380 KB	Execution killed with signal 11
50	Runtime error	36 ms	44268 KB	Execution killed with signal 11
51	Correct	21 ms	22108 KB	Output is correct
52	Runtime error	26 ms	44380 KB	Execution killed with signal 11
53	Runtime error	31 ms	44368 KB	Execution killed with signal 11
54	Correct	25 ms	22108 KB	Output is correct
55	Runtime error	27 ms	44476 KB	Execution killed with signal 11
56	Runtime error	31 ms	44636 KB	Execution killed with signal 11
57	Correct	21 ms	22108 KB	Output is correct
58	Runtime error	27 ms	44768 KB	Execution killed with signal 11
59	Runtime error	34 ms	44624 KB	Execution killed with signal 11
60	Correct	21 ms	22108 KB	Output is correct
61	Runtime error	29 ms	44892 KB	Execution killed with signal 11
62	Runtime error	35 ms	44880 KB	Execution killed with signal 11
63	Runtime error	38 ms	44948 KB	Execution killed with signal 11
64	Runtime error	38 ms	44884 KB	Execution killed with signal 11
65	Runtime error	38 ms	44880 KB	Execution killed with signal 11
66	Runtime error	39 ms	44868 KB	Execution killed with signal 11
67	Runtime error	41 ms	45140 KB	Execution killed with signal 11
68	Runtime error	39 ms	44880 KB	Execution killed with signal 11
69	Runtime error	40 ms	44984 KB	Execution killed with signal 11
70	Runtime error	40 ms	44968 KB	Execution killed with signal 11
71	Runtime error	42 ms	44880 KB	Execution killed with signal 11
72	Runtime error	41 ms	44880 KB	Execution killed with signal 11
73	Runtime error	49 ms	46160 KB	Execution killed with signal 11
74	Runtime error	40 ms	45876 KB	Execution killed with signal 11
75	Runtime error	40 ms	45944 KB	Execution killed with signal 11
76	Runtime error	47 ms	46172 KB	Execution killed with signal 11
77	Runtime error	40 ms	45908 KB	Execution killed with signal 11
78	Correct	71 ms	22844 KB	Output is correct
79	Correct	53 ms	22848 KB	Output is correct
80	Correct	64 ms	22620 KB	Output is correct
81	Correct	71 ms	22620 KB	Output is correct
82	Correct	55 ms	22616 KB	Output is correct
83	Correct	98 ms	22616 KB	Output is correct
84	Correct	101 ms	22776 KB	Output is correct
85	Correct	88 ms	22760 KB	Output is correct
86	Correct	105 ms	22764 KB	Output is correct
87	Correct	115 ms	22756 KB	Output is correct
88	Correct	121 ms	22648 KB	Output is correct
89	Correct	101 ms	22656 KB	Output is correct
90	Correct	113 ms	22656 KB	Output is correct
91	Correct	115 ms	22656 KB	Output is correct
92	Correct	107 ms	22648 KB	Output is correct