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Submission #470769

# Submission time Handle Problem Language Result Execution time Memory
470769 2021-09-05T13:50:35 Z Yazan_Alattar Mecho (IOI09_mecho) C++14
45 / 100
 134 ms 11588 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;
char a[M][M];
int n, s, d[M][M], dist[M][M], res[M][M];
bool vist[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[ny][nx] - 1 || dist[ny][nx] || ny < 1 || nx < 1 || ny > n || nx > n) continue;
            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;
    for(int i = 1; i <= n; ++i){
        for(int j = 1; j <= n; ++j){
            res[i][j] = -1;
            if(d[i][j] && dist[i][j]) res[i][j] = (d[i][j] - 1) - ((dist[i][j] - 2) / s + 1);
//            cout << res[i][j] << " ";
        }
//        cout << endl;
    }
    priority_queue < pair < int, pair <int,int> > > pq;
    pq.push({res[st.F][st.S], st});
    vist[st.F][st.S] = 1;
    while(!pq.empty()){
        int x = pq.top().S.S;
        int y = pq.top().S.F;
        int cost = pq.top().F;
        pq.pop();
//        cout << x << " " << y << " " << cost << endl;
        if(x == en.S && y == en.F) return cout << cost << endl, 0;
        for(int i = 0; i < 4; ++i){
            int nx = x + dx[i];
            int ny = y + dy[i];
            int ncost = min(cost, res[ny][nx]);
            if(vist[ny][nx] || dist[y][x] >= dist[ny][nx] || ncost == -1 || ny < 1 || nx < 1 || ny > n || nx > n) continue;
            vist[ny][nx] = 1;
            pq.push({ncost, {ny, nx}});
        }
    }
    return 0;
}
// Don't forget special cases. (n = 1?)
// Look for the constraints. (Runtime array? overflow?)

Subtask #1
45.0 / 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 1 ms 332 KB Output is correct
6 Incorrect 1 ms 332 KB Output isn't correct
7 Incorrect 134 ms 11068 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 844 KB Output isn't correct
13 Correct 1 ms 844 KB Output is correct
14 Correct 1 ms 716 KB Output is correct
15 Incorrect 1 ms 460 KB Output isn't correct
16 Correct 1 ms 460 KB Output is correct
17 Incorrect 1 ms 588 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 588 KB Output is correct
21 Incorrect 1 ms 716 KB Output isn't correct
22 Correct 1 ms 716 KB Output is correct
23 Incorrect 1 ms 844 KB Output isn't correct
24 Correct 2 ms 844 KB Output is correct
25 Incorrect 1 ms 972 KB Output isn't correct
26 Correct 1 ms 972 KB Output is correct
27 Incorrect 1 ms 972 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 1228 KB Output is correct
31 Incorrect 2 ms 1028 KB Output isn't correct
32 Correct 2 ms 1228 KB Output is correct
33 Incorrect 13 ms 4088 KB Output isn't correct
34 Correct 14 ms 4812 KB Output is correct
35 Incorrect 23 ms 5148 KB Output isn't correct
36 Incorrect 20 ms 4764 KB Output isn't correct
37 Correct 21 ms 5376 KB Output is correct
38 Incorrect 25 ms 5744 KB Output isn't correct
39 Incorrect 20 ms 5152 KB Output isn't correct
40 Correct 21 ms 6012 KB Output is correct
41 Incorrect 31 ms 6528 KB Output isn't correct
42 Incorrect 24 ms 5700 KB Output isn't correct
43 Correct 26 ms 6720 KB Output is correct
44 Incorrect 38 ms 7108 KB Output isn't correct
45 Incorrect 28 ms 6164 KB Output isn't correct
46 Correct 37 ms 7256 KB Output is correct
47 Incorrect 47 ms 7808 KB Output isn't correct
48 Incorrect 34 ms 6724 KB Output isn't correct
49 Correct 35 ms 7984 KB Output is correct
50 Incorrect 54 ms 8516 KB Output isn't correct
51 Incorrect 39 ms 7348 KB Output isn't correct
52 Correct 45 ms 8592 KB Output is correct
53 Incorrect 61 ms 9212 KB Output isn't correct
54 Incorrect 48 ms 8004 KB Output isn't correct
55 Correct 49 ms 9200 KB Output is correct
56 Incorrect 69 ms 9928 KB Output isn't correct
57 Incorrect 51 ms 8372 KB Output isn't correct
58 Correct 55 ms 9896 KB Output is correct
59 Incorrect 81 ms 10564 KB Output isn't correct
60 Incorrect 63 ms 8904 KB Output isn't correct
61 Correct 62 ms 10436 KB Output is correct
62 Incorrect 92 ms 11240 KB Output isn't correct
63 Correct 105 ms 11260 KB Output is correct
64 Correct 113 ms 11332 KB Output is correct
65 Correct 111 ms 11400 KB Output is correct
66 Incorrect 105 ms 11268 KB Output isn't correct
67 Correct 74 ms 7368 KB Output is correct
68 Correct 91 ms 11292 KB Output is correct
69 Correct 86 ms 11256 KB Output is correct
70 Correct 82 ms 11332 KB Output is correct
71 Correct 77 ms 11296 KB Output is correct
72 Correct 81 ms 10644 KB Output is correct
73 Correct 77 ms 11588 KB Output is correct
74 Correct 118 ms 11524 KB Output is correct
75 Correct 120 ms 11568 KB Output is correct
76 Correct 104 ms 11588 KB Output is correct
77 Correct 106 ms 11588 KB Output is correct
78 Correct 71 ms 6020 KB Output is correct
79 Correct 108 ms 10984 KB Output is correct
80 Correct 100 ms 9416 KB Output is correct
81 Correct 110 ms 9364 KB Output is correct
82 Correct 100 ms 9484 KB Output is correct
83 Correct 124 ms 9552 KB Output is correct
84 Correct 131 ms 11076 KB Output is correct
85 Correct 105 ms 9564 KB Output is correct
86 Correct 112 ms 9492 KB Output is correct
87 Correct 122 ms 9676 KB Output is correct
88 Correct 124 ms 9796 KB Output is correct
89 Correct 130 ms 11064 KB Output is correct
90 Correct 133 ms 10700 KB Output is correct
91 Correct 128 ms 11004 KB Output is correct
92 Correct 124 ms 9804 KB Output is correct