Submission #583548

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
583548	2022-06-25T14:34:50 Z	Trent	Mecho (IOI09_mecho)	C++17	0 / 100	89 ms	14020 KB

mecho

#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();
        assert(sl > 0 || ber[r][c] < bee[r][c]);
        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

0.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Runtime error	10 ms	12116 KB	Execution killed with signal 6
2	Runtime error	13 ms	12116 KB	Execution killed with signal 6
3	Runtime error	9 ms	12116 KB	Execution killed with signal 6
4	Runtime error	10 ms	12116 KB	Execution killed with signal 6
5	Runtime error	9 ms	12116 KB	Execution killed with signal 6
6	Runtime error	9 ms	12200 KB	Execution killed with signal 6
7	Runtime error	78 ms	13624 KB	Execution killed with signal 6
8	Correct	4 ms	5972 KB	Output is correct
9	Runtime error	12 ms	12116 KB	Execution killed with signal 6
10	Runtime error	9 ms	12116 KB	Execution killed with signal 6
11	Runtime error	12 ms	12196 KB	Execution killed with signal 6
12	Runtime error	10 ms	12244 KB	Execution killed with signal 6
13	Runtime error	10 ms	12176 KB	Execution killed with signal 6
14	Runtime error	11 ms	12268 KB	Execution killed with signal 6
15	Runtime error	9 ms	12116 KB	Execution killed with signal 6
16	Runtime error	10 ms	12116 KB	Execution killed with signal 6
17	Runtime error	10 ms	12348 KB	Execution killed with signal 6
18	Runtime error	9 ms	12116 KB	Execution killed with signal 6
19	Runtime error	9 ms	12244 KB	Execution killed with signal 6
20	Runtime error	10 ms	12116 KB	Execution killed with signal 6
21	Runtime error	10 ms	12244 KB	Execution killed with signal 6
22	Runtime error	10 ms	12244 KB	Execution killed with signal 6
23	Runtime error	9 ms	12244 KB	Execution killed with signal 6
24	Runtime error	11 ms	12244 KB	Execution killed with signal 6
25	Runtime error	11 ms	12280 KB	Execution killed with signal 6
26	Runtime error	10 ms	12224 KB	Execution killed with signal 6
27	Runtime error	10 ms	12244 KB	Execution killed with signal 6
28	Runtime error	10 ms	12244 KB	Execution killed with signal 6
29	Runtime error	9 ms	12276 KB	Execution killed with signal 6
30	Runtime error	9 ms	12272 KB	Execution killed with signal 6
31	Runtime error	11 ms	12244 KB	Execution killed with signal 6
32	Runtime error	9 ms	12244 KB	Execution killed with signal 6
33	Runtime error	18 ms	12756 KB	Execution killed with signal 6
34	Runtime error	19 ms	12756 KB	Execution killed with signal 6
35	Runtime error	22 ms	12632 KB	Execution killed with signal 6
36	Runtime error	21 ms	12748 KB	Execution killed with signal 6
37	Runtime error	20 ms	12740 KB	Execution killed with signal 6
38	Runtime error	23 ms	12832 KB	Execution killed with signal 6
39	Runtime error	22 ms	12884 KB	Execution killed with signal 6
40	Runtime error	24 ms	12892 KB	Execution killed with signal 6
41	Runtime error	29 ms	12800 KB	Execution killed with signal 6
42	Runtime error	25 ms	12908 KB	Execution killed with signal 6
43	Runtime error	26 ms	12924 KB	Execution killed with signal 6
44	Runtime error	30 ms	12872 KB	Execution killed with signal 6
45	Runtime error	31 ms	12976 KB	Execution killed with signal 6
46	Runtime error	33 ms	13012 KB	Execution killed with signal 6
47	Runtime error	37 ms	13056 KB	Execution killed with signal 6
48	Runtime error	33 ms	13124 KB	Execution killed with signal 6
49	Runtime error	30 ms	13048 KB	Execution killed with signal 6
50	Runtime error	39 ms	13076 KB	Execution killed with signal 6
51	Runtime error	37 ms	13204 KB	Execution killed with signal 6
52	Runtime error	40 ms	13104 KB	Execution killed with signal 6
53	Runtime error	58 ms	13196 KB	Execution killed with signal 6
54	Runtime error	42 ms	13256 KB	Execution killed with signal 6
55	Runtime error	42 ms	13252 KB	Execution killed with signal 6
56	Runtime error	50 ms	13236 KB	Execution killed with signal 6
57	Runtime error	48 ms	13280 KB	Execution killed with signal 6
58	Runtime error	45 ms	13364 KB	Execution killed with signal 6
59	Runtime error	60 ms	13308 KB	Execution killed with signal 6
60	Runtime error	55 ms	13360 KB	Execution killed with signal 6
61	Runtime error	62 ms	13348 KB	Execution killed with signal 6
62	Runtime error	60 ms	13472 KB	Execution killed with signal 6
63	Runtime error	79 ms	13368 KB	Execution killed with signal 6
64	Runtime error	87 ms	13412 KB	Execution killed with signal 6
65	Runtime error	79 ms	13384 KB	Execution killed with signal 6
66	Runtime error	86 ms	13360 KB	Execution killed with signal 6
67	Correct	71 ms	6668 KB	Output is correct
68	Runtime error	72 ms	13476 KB	Execution killed with signal 6
69	Runtime error	81 ms	13472 KB	Execution killed with signal 6
70	Runtime error	69 ms	13408 KB	Execution killed with signal 6
71	Runtime error	68 ms	13440 KB	Execution killed with signal 6
72	Runtime error	71 ms	13468 KB	Execution killed with signal 6
73	Runtime error	70 ms	13900 KB	Execution killed with signal 6
74	Runtime error	79 ms	14020 KB	Execution killed with signal 6
75	Runtime error	70 ms	13992 KB	Execution killed with signal 6
76	Runtime error	71 ms	13996 KB	Execution killed with signal 6
77	Runtime error	80 ms	13916 KB	Execution killed with signal 6
78	Runtime error	71 ms	13896 KB	Execution killed with signal 6
79	Runtime error	72 ms	13868 KB	Execution killed with signal 6
80	Runtime error	68 ms	13916 KB	Execution killed with signal 6
81	Runtime error	68 ms	13948 KB	Execution killed with signal 6
82	Runtime error	76 ms	13852 KB	Execution killed with signal 6
83	Runtime error	67 ms	13848 KB	Execution killed with signal 6
84	Runtime error	71 ms	13772 KB	Execution killed with signal 6
85	Runtime error	81 ms	13772 KB	Execution killed with signal 6
86	Runtime error	89 ms	13764 KB	Execution killed with signal 6
87	Runtime error	73 ms	13884 KB	Execution killed with signal 6
88	Runtime error	64 ms	13696 KB	Execution killed with signal 6
89	Runtime error	88 ms	13716 KB	Execution killed with signal 6
90	Runtime error	77 ms	13732 KB	Execution killed with signal 6
91	Runtime error	80 ms	13880 KB	Execution killed with signal 6
92	Runtime error	82 ms	13692 KB	Execution killed with signal 6