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Submission #470763

# Submission time Handle Problem Language Result Execution time Memory
470763 2021-09-05T13:27:29 Z Yazan_Alattar Mecho (IOI09_mecho) C++14
19 / 100
 73 ms 13896 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>
#include <algorithm>
#include <set>
#include <map>
#include <queue>
#include <utility>
#include <cmath>
#include <numeric>
using namespace std;
typedef long long ll;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 1007;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const double pi = acos(-1);
const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};

queue < pair <int,int> > q;
pair <int,int> st, en, p[M][M];
char a[M][M];
int n, s, d[M][M], dist[M][M];

int main()
{
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> s;
    for(int i = 1; i <= n; ++i){
        for(int j = 1; j <= n; ++j){
            cin >> a[i][j];
            if(a[i][j] == 'H') q.push({i, j}), d[i][j] = 1;
            if(a[i][j] == 'D') en = {i, j};
            if(a[i][j] == 'M') st = {i, j};
        }
    }
    while(!q.empty()){
        int x = q.front().S;
        int y = q.front().F;
        q.pop();
        for(int i = 0; i < 4; ++i){
            int nx = x + dx[i];
            int ny = y + dy[i];
            if(a[ny][nx] == 'H' || a[ny][nx] == 'T' || d[ny][nx] || ny < 1 || nx < 1 || ny > n || nx > n) continue;
            d[ny][nx] = d[y][x] + 1;
            q.push({ny, nx});
        }
    }
//    for(int i = 1; i <= n; ++i){
//        for(int j = 1; j <= n; ++j){
//            cout << d[i][j] << " ";
//        }
//        cout << endl;
//    }
    q.push(st);
    dist[st.F][st.S] = 1;
    while(!q.empty()){
        int x = q.front().S;
        int y = q.front().F;
        q.pop();
        for(int i = 0; i < 4; ++i){
            int nx = x + dx[i];
            int ny = y + dy[i];
            if(a[ny][nx] == 'H' || a[ny][nx] == 'T' || (dist[y][x]) / s >= d[y][x] - 1 || dist[ny][nx] || ny < 1 || nx < 1 || ny > n || nx > n) continue;
            p[ny][nx] = {y, x};
            dist[ny][nx] = dist[y][x] + 1;
            q.push({ny, nx});
        }
    }
//    cout << endl;
//    for(int i = 1; i <= n; ++i){
//        for(int j = 1; j <= n; ++j) cout << dist[i][j] << " ";
//        cout << endl;
//    }
    if(!dist[en.F][en.S]) return cout << -1 << endl, 0;
    int ans = 1e9;

    int i = en.F, j = en.S;
    while(i != st.F || j != st.S){
        ans = min(ans, (d[i][j] - 1) - ((dist[i][j] - 2) / s + 1));
//        cout << i << " " << j << " " << (d[i][j] - 1) - ((dist[i][j] - 2) / s + 1) << " " << d[i][j] - 1 << " " << (dist[i][j] - 1) / s << endl;
        int ni = p[i][j].F, nj = p[i][j].S;
        i = ni;
        j = nj;
    }
    cout << ans << endl;
    return 0;
}
// Don't forget special cases. (n = 1?)
// Look for the constraints. (Runtime array? overflow?)

Subtask #1
19.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Incorrect 1 ms 332 KB Output isn't correct
3 Incorrect 1 ms 332 KB Output isn't correct
4 Incorrect 1 ms 332 KB Output isn't correct
5 Correct 0 ms 332 KB Output is correct
6 Incorrect 1 ms 460 KB Output isn't correct
7 Incorrect 69 ms 13488 KB Output isn't correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Incorrect 1 ms 1100 KB Output isn't correct
13 Incorrect 1 ms 716 KB Output isn't correct
14 Correct 1 ms 844 KB Output is correct
15 Incorrect 1 ms 460 KB Output isn't correct
16 Correct 1 ms 588 KB Output is correct
17 Incorrect 1 ms 460 KB Output isn't correct
18 Correct 1 ms 588 KB Output is correct
19 Incorrect 1 ms 588 KB Output isn't correct
20 Correct 1 ms 716 KB Output is correct
21 Incorrect 1 ms 588 KB Output isn't correct
22 Correct 1 ms 844 KB Output is correct
23 Incorrect 1 ms 716 KB Output isn't correct
24 Correct 1 ms 972 KB Output is correct
25 Incorrect 1 ms 844 KB Output isn't correct
26 Correct 1 ms 1100 KB Output is correct
27 Incorrect 1 ms 844 KB Output isn't correct
28 Correct 1 ms 1100 KB Output is correct
29 Incorrect 1 ms 972 KB Output isn't correct
30 Correct 1 ms 1164 KB Output is correct
31 Incorrect 1 ms 932 KB Output isn't correct
32 Correct 1 ms 1228 KB Output is correct
33 Incorrect 7 ms 3660 KB Output isn't correct
34 Correct 10 ms 5520 KB Output is correct
35 Incorrect 11 ms 5708 KB Output isn't correct
36 Incorrect 8 ms 4220 KB Output isn't correct
37 Correct 10 ms 6348 KB Output is correct
38 Incorrect 19 ms 6732 KB Output isn't correct
39 Incorrect 10 ms 4676 KB Output isn't correct
40 Correct 12 ms 7264 KB Output is correct
41 Incorrect 17 ms 7668 KB Output isn't correct
42 Incorrect 12 ms 5196 KB Output isn't correct
43 Correct 15 ms 8140 KB Output is correct
44 Incorrect 20 ms 8652 KB Output isn't correct
45 Incorrect 15 ms 5836 KB Output isn't correct
46 Correct 17 ms 9036 KB Output is correct
47 Incorrect 25 ms 9432 KB Output isn't correct
48 Incorrect 18 ms 6216 KB Output isn't correct
49 Correct 23 ms 9732 KB Output is correct
50 Incorrect 30 ms 10292 KB Output isn't correct
51 Incorrect 18 ms 6700 KB Output isn't correct
52 Correct 22 ms 10572 KB Output is correct
53 Incorrect 33 ms 11140 KB Output isn't correct
54 Incorrect 20 ms 7160 KB Output isn't correct
55 Correct 25 ms 11412 KB Output is correct
56 Incorrect 39 ms 11968 KB Output isn't correct
57 Incorrect 24 ms 7676 KB Output isn't correct
58 Correct 28 ms 12132 KB Output is correct
59 Incorrect 45 ms 12740 KB Output isn't correct
60 Incorrect 26 ms 8280 KB Output isn't correct
61 Correct 32 ms 12876 KB Output is correct
62 Incorrect 52 ms 13664 KB Output isn't correct
63 Incorrect 44 ms 12832 KB Output isn't correct
64 Correct 58 ms 13636 KB Output is correct
65 Correct 58 ms 13588 KB Output is correct
66 Incorrect 64 ms 13584 KB Output isn't correct
67 Correct 45 ms 12868 KB Output is correct
68 Correct 42 ms 12104 KB Output is correct
69 Correct 46 ms 12612 KB Output is correct
70 Correct 41 ms 11840 KB Output is correct
71 Correct 40 ms 11836 KB Output is correct
72 Incorrect 46 ms 12740 KB Output isn't correct
73 Incorrect 65 ms 12828 KB Output isn't correct
74 Incorrect 68 ms 13896 KB Output isn't correct
75 Incorrect 48 ms 12852 KB Output isn't correct
76 Incorrect 48 ms 12612 KB Output isn't correct
77 Incorrect 52 ms 13112 KB Output isn't correct
78 Correct 60 ms 8944 KB Output is correct
79 Incorrect 73 ms 13848 KB Output isn't correct
80 Correct 50 ms 9028 KB Output is correct
81 Correct 44 ms 8812 KB Output is correct
82 Incorrect 47 ms 9244 KB Output isn't correct
83 Correct 47 ms 9028 KB Output is correct
84 Incorrect 68 ms 13808 KB Output isn't correct
85 Incorrect 53 ms 9196 KB Output isn't correct
86 Incorrect 48 ms 9140 KB Output isn't correct
87 Incorrect 48 ms 9668 KB Output isn't correct
88 Correct 64 ms 9700 KB Output is correct
89 Incorrect 72 ms 13848 KB Output isn't correct
90 Incorrect 55 ms 11972 KB Output isn't correct
91 Incorrect 61 ms 13760 KB Output isn't correct
92 Incorrect 50 ms 9924 KB Output isn't correct