oj.uz

Submission #583550

# Submission time Handle Problem Language Result Execution time Memory
583550 2022-06-25T14:37:10 Z Trent Mecho (IOI09_mecho) C++17
4 / 100
 67 ms 4428 KB 
#include "bits/stdc++.h"
#include "ext/pb_ds/assoc_container.hpp"

using namespace std;
using namespace __gnu_pbds;
#define ll long long
#define open(g) string _name_ = g; freopen((_name_ + ".in").c_str(), "r", stdin); freopen((_name_ + ".out").c_str(), "w", stdout)
#define printArr(a, len) for(int asdf = 0; asdf < (len); ++asdf) cout << (a)[asdf] << ' '; cout << '\n';
#define boost() cin.sync_with_stdio(0); cin.tie(0)
#define forR(i, x) for(int i = 0; i < x; ++i)
#define REP(i, a, b) for(int i = (a); i < (b); ++i)
#define all(i) i.begin(), i.end()
#define pii pair<int, int>
#define vi vector<int>
#define si set<int>
#define usi unordered_set<int>
#define mii map<int, int>
#define umii unordered_map<int, int>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")

const int MN = 810, INF = 1e9 + 10;
struct coord{int r, c;};
struct bear{int r, c, sl;};
bool vis[MN][MN];
int bee[MN][MN], ber[MN][MN]; // minimum # of minutes needed to end here
char grid[MN][MN];
int dir[4][2] = {{1, 0}, {0, 1}, {0, -1}, {-1, 0}};
int n, s;
int mr, mc;

bool ib(int r, int c){return 0 <= r && r < n && 0 <= c && c < n;}
bool iv(int r, int c){return ib(r, c) && grid[r][c] != 'T';}

// t = number of minutes bear eats
bool pos(int t){
    if(bee[mr][mc] >= t) return false;
    deque<bear> bfs = {{mr, mc, 0}};
    forR(a, MN) forR(b, MN) vis[a][b] = false;
    forR(a, MN) forR(b, MN) ber[a][b] = 0;
    ber[mr][mc] = t;
    vis[mr][mc] = true;
    while(!bfs.empty()){
        auto [r, c, sl] = bfs.front();
        bfs.pop_front();
        if(!(sl > 0 || ber[r][c] < bee[r][c])){
            cout << r << ' ' << c << ' ' << sl << '\n';
            cout << "bad";
        }
        if(grid[r][c] == 'D') {
            return true;
        }
        for(auto [rc, cc] : dir){
            auto [nr, nc] = pii{r+rc, c+cc};
            int dis = ber[r][c] + (sl == 0);
            int nsl = sl == 0 ? s - 1 : sl - 1;
            // cout << r << ' ' << c << ' ' << sl << ' ' << nr << ' ' << nc << ' ' << dis << ' ' << bee[nr][nc] << '\n';
            if(iv(nr, nc) && !vis[nr][nc] && (nsl != 0 || dis < bee[nr][nc])){
                ber[nr][nc] = dis;
                vis[nr][nc] = true;
                bfs.push_back({nr, nc, nsl});
            }
        }
    }
    return false;
}

signed main() {
    cin >> n >> s;
    deque<coord> bfs;
    forR(r, n) forR(c, n){
        cin >> grid[r][c];
        if(grid[r][c] == 'H') {
            bfs.push_back({r, c});
            vis[r][c] = true;
        } else if(grid[r][c] == 'M'){
            mr=r, mc=c;
        }
    }
    while(!bfs.empty()){
        auto [r, c] = bfs.front();
        bfs.pop_front();
        for(auto [cr, cc] : dir){
            auto [nr, nc] = pii {r + cr, c + cc};
            if(iv(nr, nc) && grid[nr][nc] != 'D' && !vis[nr][nc]){
                vis[nr][nc] = true;
                bee[nr][nc] = bee[r][c] + 1;
                bfs.push_back({nr, nc});
            }
        }
    }
    forR(r, MN) forR(c, MN) if(!vis[r][c]) bee[r][c] = INF;
    if(!pos(0)) cout << "-1\n";
    else {
        // TODO fix hi
        int lo=0, hi=MN * MN;
        while(hi - lo > 1){
            int mid = (lo + hi) / 2;
            if(pos(mid)) lo = mid;
            else hi = mid;
        }
        cout << lo << '\n';
    }
}

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2772 KB Output isn't correct
2 Incorrect 2 ms 2772 KB Output isn't correct
3 Incorrect 2 ms 2772 KB Output isn't correct
4 Incorrect 2 ms 2772 KB Output isn't correct
5 Incorrect 2 ms 2796 KB Output isn't correct
6 Incorrect 2 ms 2772 KB Output isn't correct
7 Incorrect 52 ms 4216 KB Output isn't correct
8 Correct 3 ms 2900 KB Output is correct
9 Incorrect 2 ms 2900 KB Output isn't correct
10 Incorrect 2 ms 2900 KB Output isn't correct
11 Incorrect 2 ms 2900 KB Output isn't correct
12 Incorrect 3 ms 2900 KB Output isn't correct
13 Incorrect 2 ms 2900 KB Output isn't correct
14 Correct 2 ms 2900 KB Output is correct
15 Incorrect 2 ms 2900 KB Output isn't correct
16 Incorrect 2 ms 2900 KB Output isn't correct
17 Incorrect 2 ms 2900 KB Output isn't correct
18 Incorrect 2 ms 2900 KB Output isn't correct
19 Incorrect 2 ms 2900 KB Output isn't correct
20 Incorrect 2 ms 2900 KB Output isn't correct
21 Incorrect 2 ms 2900 KB Output isn't correct
22 Incorrect 3 ms 2900 KB Output isn't correct
23 Incorrect 2 ms 2900 KB Output isn't correct
24 Incorrect 3 ms 2876 KB Output isn't correct
25 Incorrect 2 ms 2900 KB Output isn't correct
26 Incorrect 3 ms 2900 KB Output isn't correct
27 Incorrect 2 ms 2900 KB Output isn't correct
28 Incorrect 3 ms 2900 KB Output isn't correct
29 Incorrect 2 ms 2900 KB Output isn't correct
30 Incorrect 2 ms 2900 KB Output isn't correct
31 Incorrect 3 ms 2900 KB Output isn't correct
32 Incorrect 3 ms 2900 KB Output isn't correct
33 Incorrect 10 ms 3368 KB Output isn't correct
34 Incorrect 10 ms 3412 KB Output isn't correct
35 Incorrect 11 ms 3384 KB Output isn't correct
36 Incorrect 12 ms 3400 KB Output isn't correct
37 Incorrect 13 ms 3492 KB Output isn't correct
38 Incorrect 13 ms 3412 KB Output isn't correct
39 Incorrect 16 ms 3472 KB Output isn't correct
40 Incorrect 16 ms 3540 KB Output isn't correct
41 Incorrect 20 ms 3540 KB Output isn't correct
42 Incorrect 21 ms 3576 KB Output isn't correct
43 Incorrect 19 ms 3668 KB Output isn't correct
44 Incorrect 20 ms 3560 KB Output isn't correct
45 Incorrect 22 ms 3720 KB Output isn't correct
46 Incorrect 24 ms 3640 KB Output isn't correct
47 Incorrect 24 ms 3668 KB Output isn't correct
48 Incorrect 24 ms 3700 KB Output isn't correct
49 Incorrect 25 ms 3756 KB Output isn't correct
50 Incorrect 27 ms 3832 KB Output isn't correct
51 Incorrect 29 ms 3892 KB Output isn't correct
52 Incorrect 28 ms 3796 KB Output isn't correct
53 Incorrect 33 ms 3868 KB Output isn't correct
54 Incorrect 35 ms 3900 KB Output isn't correct
55 Incorrect 33 ms 3968 KB Output isn't correct
56 Incorrect 36 ms 3868 KB Output isn't correct
57 Incorrect 42 ms 4052 KB Output isn't correct
58 Incorrect 38 ms 4060 KB Output isn't correct
59 Incorrect 43 ms 4112 KB Output isn't correct
60 Incorrect 45 ms 4100 KB Output isn't correct
61 Incorrect 45 ms 4120 KB Output isn't correct
62 Incorrect 47 ms 4208 KB Output isn't correct
63 Incorrect 55 ms 4104 KB Output isn't correct
64 Incorrect 55 ms 4016 KB Output isn't correct
65 Incorrect 53 ms 4060 KB Output isn't correct
66 Incorrect 59 ms 4132 KB Output isn't correct
67 Correct 57 ms 4120 KB Output is correct
68 Incorrect 64 ms 4132 KB Output isn't correct
69 Incorrect 55 ms 4088 KB Output isn't correct
70 Incorrect 54 ms 4056 KB Output isn't correct
71 Incorrect 55 ms 4044 KB Output isn't correct
72 Incorrect 67 ms 4128 KB Output isn't correct
73 Incorrect 58 ms 4412 KB Output isn't correct
74 Incorrect 55 ms 4300 KB Output isn't correct
75 Incorrect 51 ms 4372 KB Output isn't correct
76 Incorrect 51 ms 4372 KB Output isn't correct
77 Incorrect 57 ms 4376 KB Output isn't correct
78 Correct 54 ms 4336 KB Output is correct
79 Incorrect 61 ms 4428 KB Output isn't correct
80 Incorrect 52 ms 4304 KB Output isn't correct
81 Incorrect 51 ms 4292 KB Output isn't correct
82 Incorrect 50 ms 4300 KB Output isn't correct
83 Incorrect 49 ms 4316 KB Output isn't correct
84 Incorrect 50 ms 4248 KB Output isn't correct
85 Incorrect 51 ms 4304 KB Output isn't correct
86 Incorrect 58 ms 4300 KB Output isn't correct
87 Incorrect 53 ms 4256 KB Output isn't correct
88 Incorrect 51 ms 4296 KB Output isn't correct
89 Incorrect 50 ms 4328 KB Output isn't correct
90 Incorrect 48 ms 4172 KB Output isn't correct
91 Incorrect 51 ms 4240 KB Output isn't correct
92 Incorrect 53 ms 4256 KB Output isn't correct