Submission #313370

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
313370	2020-10-15T21:54:16 Z	fergonzgut21	Mecho (IOI09_mecho)	C++14	100 / 100	170 ms	7040 KB

mecho

#include <iostream>
#include <queue>
#define MAX 802
using namespace std;

struct bee
{
    short int x;
    short int y;
    int t;
    int r;
};

int N, S, sx, sy, ex, ey, B[MAX][MAX], vis[MAX][MAX], l, r, mid, res, cur;
bool xd;
char A[MAX][MAX];
queue <bee> qiu;
bee temp;

void solve ()
{
    while (!qiu.empty())
    {
        temp = qiu.front();
        qiu.pop();
        temp.t++;
        if (B[temp.x - 1][temp.y] == -1 && A[temp.x - 1][temp.y] != 'T' && A[temp.x - 1][temp.y] != 'D')
        {
            B[temp.x - 1][temp.y] = temp.t;
            temp.x--;
            qiu.push(temp);
            temp.x++;
        }
        if (B[temp.x + 1][temp.y] == -1 && A[temp.x + 1][temp.y] != 'T' && A[temp.x + 1][temp.y] != 'D')
        {
            B[temp.x + 1][temp.y] = temp.t;
            temp.x++;
            qiu.push(temp);
            temp.x--;
        }
        if (B[temp.x][temp.y - 1] == -1 && A[temp.x][temp.y - 1] != 'T' && A[temp.x][temp.y - 1] != 'D')
        {
            B[temp.x][temp.y - 1] = temp.t;
            temp.y--;
            qiu.push(temp);
            temp.y++;
        }
        if (B[temp.x][temp.y + 1] == -1 && A[temp.x][temp.y + 1] != 'T' && A[temp.x][temp.y + 1] != 'D')
        {
            B[temp.x][temp.y + 1] = temp.t;
            temp.y++;
            qiu.push(temp);
            temp.y--;
        }
    }
}

bool solve2(int x, int y, int t, int r)
{
    if (r == -1)
        return 1;
    temp.x = x;
    temp.y = y;
    temp.t = t;
    temp.r = r;
    qiu.push(temp);
    while (!qiu.empty())
    {
        temp = qiu.front();
        qiu.pop();
        //cout << temp.x << " " << temp.y << " " << temp.t << " " << temp.r << endl;
        if (temp.x == ex && temp.y == ey)
            return 1;
        if (temp.r + (temp.t / S) >= B[temp.x][temp.y])
            continue;
        temp.t++;
        if (vis[temp.x + 1][temp.y] < cur && A[temp.x + 1][temp.y] != 'T')
        {
                vis[temp.x + 1][temp.y] = cur;
                temp.x++;
                qiu.push(temp);
                temp.x--;
        }
        if (vis[temp.x - 1][temp.y] < cur && A[temp.x - 1][temp.y] != 'T')
        {
                vis[temp.x - 1][temp.y] = cur;
                temp.x--;
                qiu.push(temp);
                temp.x++;
        }
        if (vis[temp.x][temp.y + 1] < cur && A[temp.x][temp.y + 1] != 'T')
        {
                vis[temp.x][temp.y + 1] = cur;
                temp.y++;
                qiu.push(temp);
                temp.y--;
        }
        if (vis[temp.x][temp.y - 1] < cur && A[temp.x][temp.y - 1] != 'T')
        {
                vis[temp.x][temp.y - 1] = cur;
                temp.y--;
                qiu.push(temp);
                temp.y++;
        }
    }
    return 0;
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> N >> S;
    for (int i = 1; i <= N; i++)
        for (int j = 1; j <= N; j++)
        {
            cin >> A[i][j];
            vis[i][j] = -1;
            B[i][j] = -1;
            if (A[i][j] == 'M')
            {
                sx = i;
                sy = j;
            }
            if (A[i][j] == 'D')
            {
                ex = i;
                ey = j;
            }
            if (A[i][j] == 'H')
            {
                temp.x = i;
                temp.y = j;
                temp.t = 0;
                B[i][j] = 0;
                qiu.push(temp);
            }
        }
    solve();
    l = -1;
    r = 650000;
    while (l <= r)
    {
        mid = (l + r) / 2;
        cur++;
        vis[sx][sy] = cur;
        while (!qiu.empty())
            qiu.pop();
        xd = solve2(sx, sy, 0, mid);
        if (xd == 1)
        {
            res = mid;
            l = mid + 1;
        }
        else
            r = mid - 1;
    }
    cout << res;
    return 0;
}

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	1 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	77 ms	6784 KB	Output is correct
8	Correct	1 ms	512 KB	Output is correct
9	Correct	1 ms	512 KB	Output is correct
10	Correct	1 ms	512 KB	Output is correct
11	Correct	1 ms	512 KB	Output is correct
12	Correct	1 ms	768 KB	Output is correct
13	Correct	1 ms	768 KB	Output is correct
14	Correct	1 ms	768 KB	Output is correct
15	Correct	1 ms	512 KB	Output is correct
16	Correct	1 ms	512 KB	Output is correct
17	Correct	1 ms	512 KB	Output is correct
18	Correct	1 ms	512 KB	Output is correct
19	Correct	1 ms	512 KB	Output is correct
20	Correct	1 ms	512 KB	Output is correct
21	Correct	1 ms	640 KB	Output is correct
22	Correct	1 ms	640 KB	Output is correct
23	Correct	1 ms	768 KB	Output is correct
24	Correct	1 ms	768 KB	Output is correct
25	Correct	1 ms	768 KB	Output is correct
26	Correct	1 ms	768 KB	Output is correct
27	Correct	1 ms	768 KB	Output is correct
28	Correct	1 ms	768 KB	Output is correct
29	Correct	1 ms	896 KB	Output is correct
30	Correct	1 ms	896 KB	Output is correct
31	Correct	1 ms	896 KB	Output is correct
32	Correct	1 ms	896 KB	Output is correct
33	Correct	5 ms	2944 KB	Output is correct
34	Correct	5 ms	2976 KB	Output is correct
35	Correct	17 ms	2944 KB	Output is correct
36	Correct	6 ms	3328 KB	Output is correct
37	Correct	6 ms	3328 KB	Output is correct
38	Correct	23 ms	3328 KB	Output is correct
39	Correct	8 ms	3712 KB	Output is correct
40	Correct	7 ms	3760 KB	Output is correct
41	Correct	28 ms	3712 KB	Output is correct
42	Correct	9 ms	4096 KB	Output is correct
43	Correct	8 ms	4096 KB	Output is correct
44	Correct	37 ms	4096 KB	Output is correct
45	Correct	11 ms	4480 KB	Output is correct
46	Correct	10 ms	4480 KB	Output is correct
47	Correct	43 ms	4480 KB	Output is correct
48	Correct	13 ms	5024 KB	Output is correct
49	Correct	11 ms	4992 KB	Output is correct
50	Correct	54 ms	5112 KB	Output is correct
51	Correct	14 ms	5376 KB	Output is correct
52	Correct	15 ms	5504 KB	Output is correct
53	Correct	71 ms	5376 KB	Output is correct
54	Correct	17 ms	5760 KB	Output is correct
55	Correct	15 ms	5760 KB	Output is correct
56	Correct	83 ms	5760 KB	Output is correct
57	Correct	18 ms	6144 KB	Output is correct
58	Correct	19 ms	6144 KB	Output is correct
59	Correct	94 ms	6264 KB	Output is correct
60	Correct	20 ms	6656 KB	Output is correct
61	Correct	19 ms	6656 KB	Output is correct
62	Correct	108 ms	6656 KB	Output is correct
63	Correct	100 ms	6656 KB	Output is correct
64	Correct	170 ms	6776 KB	Output is correct
65	Correct	151 ms	6656 KB	Output is correct
66	Correct	128 ms	6684 KB	Output is correct
67	Correct	102 ms	6776 KB	Output is correct
68	Correct	51 ms	6832 KB	Output is correct
69	Correct	50 ms	6656 KB	Output is correct
70	Correct	39 ms	6656 KB	Output is correct
71	Correct	34 ms	6656 KB	Output is correct
72	Correct	31 ms	6856 KB	Output is correct
73	Correct	36 ms	7040 KB	Output is correct
74	Correct	51 ms	7040 KB	Output is correct
75	Correct	60 ms	7032 KB	Output is correct
76	Correct	51 ms	7040 KB	Output is correct
77	Correct	58 ms	7040 KB	Output is correct
78	Correct	57 ms	7040 KB	Output is correct
79	Correct	43 ms	7040 KB	Output is correct
80	Correct	51 ms	7040 KB	Output is correct
81	Correct	57 ms	7040 KB	Output is correct
82	Correct	51 ms	7040 KB	Output is correct
83	Correct	65 ms	6912 KB	Output is correct
84	Correct	59 ms	6912 KB	Output is correct
85	Correct	67 ms	6912 KB	Output is correct
86	Correct	74 ms	7024 KB	Output is correct
87	Correct	66 ms	6976 KB	Output is correct
88	Correct	67 ms	6912 KB	Output is correct
89	Correct	67 ms	6912 KB	Output is correct
90	Correct	71 ms	6912 KB	Output is correct
91	Correct	75 ms	6912 KB	Output is correct
92	Correct	86 ms	6912 KB	Output is correct