oj.uz

Submission #470771

# Submission time Handle Problem Language Result Execution time Memory
470771 2021-09-05T14:04:54 Z Yazan_Alattar Mecho (IOI09_mecho) C++14
53 / 100
 126 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' || a[ny][nx] == 'D' || 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;
//    }
    d[en.F][en.S] = 1e9;
    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
53.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 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 Correct 1 ms 460 KB Output is correct
7 Correct 102 ms 11060 KB Output is 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 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 588 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 592 KB Output isn't correct
20 Correct 1 ms 716 KB Output is correct
21 Incorrect 1 ms 716 KB Output isn't correct
22 Correct 1 ms 844 KB Output is correct
23 Incorrect 1 ms 844 KB Output isn't correct
24 Correct 1 ms 972 KB Output is correct
25 Incorrect 1 ms 972 KB Output isn't correct
26 Correct 1 ms 1100 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 1100 KB Output isn't correct
30 Correct 1 ms 1228 KB Output is correct
31 Incorrect 1 ms 1100 KB Output isn't correct
32 Correct 2 ms 1228 KB Output is correct
33 Incorrect 7 ms 4044 KB Output isn't correct
34 Correct 10 ms 4832 KB Output is correct
35 Incorrect 14 ms 5096 KB Output isn't correct
36 Incorrect 10 ms 4684 KB Output isn't correct
37 Correct 10 ms 5452 KB Output is correct
38 Incorrect 17 ms 5836 KB Output isn't correct
39 Incorrect 11 ms 5180 KB Output isn't correct
40 Correct 12 ms 6056 KB Output is correct
41 Incorrect 23 ms 6552 KB Output isn't correct
42 Incorrect 12 ms 5752 KB Output isn't correct
43 Correct 15 ms 6684 KB Output is correct
44 Incorrect 26 ms 7188 KB Output isn't correct
45 Incorrect 15 ms 6220 KB Output isn't correct
46 Correct 17 ms 7276 KB Output is correct
47 Incorrect 35 ms 7884 KB Output isn't correct
48 Incorrect 17 ms 6760 KB Output isn't correct
49 Correct 20 ms 8032 KB Output is correct
50 Incorrect 37 ms 8588 KB Output isn't correct
51 Incorrect 23 ms 7400 KB Output isn't correct
52 Correct 23 ms 8572 KB Output is correct
53 Incorrect 43 ms 9280 KB Output isn't correct
54 Incorrect 24 ms 7920 KB Output isn't correct
55 Correct 26 ms 9248 KB Output is correct
56 Incorrect 49 ms 9932 KB Output isn't correct
57 Incorrect 25 ms 8372 KB Output isn't correct
58 Correct 29 ms 9844 KB Output is correct
59 Incorrect 62 ms 10656 KB Output isn't correct
60 Incorrect 29 ms 8940 KB Output isn't correct
61 Correct 33 ms 10564 KB Output is correct
62 Incorrect 63 ms 11368 KB Output isn't correct
63 Correct 78 ms 11372 KB Output is correct
64 Correct 90 ms 11332 KB Output is correct
65 Correct 82 ms 11268 KB Output is correct
66 Incorrect 80 ms 11268 KB Output isn't correct
67 Correct 41 ms 7380 KB Output is correct
68 Correct 59 ms 11368 KB Output is correct
69 Correct 57 ms 11380 KB Output is correct
70 Correct 63 ms 11336 KB Output is correct
71 Correct 49 ms 11368 KB Output is correct
72 Correct 48 ms 10692 KB Output is correct
73 Correct 69 ms 11584 KB Output is correct
74 Correct 99 ms 11576 KB Output is correct
75 Correct 80 ms 11588 KB Output is correct
76 Correct 73 ms 11564 KB Output is correct
77 Correct 80 ms 11588 KB Output is correct
78 Correct 45 ms 5980 KB Output is correct
79 Correct 85 ms 10988 KB Output is correct
80 Correct 72 ms 9412 KB Output is correct
81 Correct 78 ms 9468 KB Output is correct
82 Correct 68 ms 9440 KB Output is correct
83 Correct 93 ms 9476 KB Output is correct
84 Correct 107 ms 11072 KB Output is correct
85 Correct 81 ms 9556 KB Output is correct
86 Correct 84 ms 9500 KB Output is correct
87 Correct 88 ms 9692 KB Output is correct
88 Correct 95 ms 9788 KB Output is correct
89 Correct 103 ms 11076 KB Output is correct
90 Correct 102 ms 10756 KB Output is correct
91 Correct 126 ms 11044 KB Output is correct
92 Correct 97 ms 9804 KB Output is correct