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Submission #792230

# Submission time Handle Problem Language Result Execution time Memory
792230 2023-07-24T19:44:17 Z Mathandski Mecho (IOI09_mecho) C++14
54 / 100
 155 ms 9068 KB 
#define pb push_back
#define mt make_tuple
#define mp make_pair
#define is insert
#define ll long long
#define vl vector<ll>
#define sl set<ll>
#define msl multiset<ll>
#define pl pair<ll, ll>
#define vpl vector<pair<ll, ll>>
#define f0r(i, begin, end) for (ll i = begin; i < end; i ++) 
#define len(x) x.size()
#include "bits/stdc++.h"
using namespace std;

const int INF = 1e9;
int grid[800][800], N, M;
pair<int, int> arrives[800][800];
pl start, home;

bool process1 (int x, int y, int weight) {
    if((x < 0) || (x >= N) || (y < 0) || (y >= N)) {
        return false;
    }
    if (grid[x][y] != INF) {
        return false;
    }
    grid[x][y] = weight;
    return true;
}

bool process2 (int x, int y, pair<int, int> weight) {
    if((x < 0) || (x >= N) || (y < 0) || (y >= N)) {
        return false;
    }
    if (arrives[x][y].first != INF) {
        return false;
    }
    if (grid[x][y] <= weight.first) {
        return false;
    }
    arrives[x][y] = weight;
    return true;
}

bool test (int time) {
    f0r (i, 0, N) {
        f0r (j, 0, N) {
            arrives[i][j] = {INF, INF};
        }
    }
    arrives[start.first][start.second] = {time, 0};
    queue<pair<int, int>> q;
    q.push(start);
    while (!q.empty()) {
        int x, y; tie(x, y) = q.front();
        q.pop();
        auto llegar = arrives[x][y];
        if((++llegar.second) > M) {
            llegar.first ++;
            llegar.second = 1;
        }

        if (process2(x + 1, y, llegar)) {
            q.push({x + 1, y});
        }
        if (process2(x - 1, y, llegar)) {
            q.push({x - 1, y});
        }
        if (process2(x, y + 1, llegar)) {
            q.push({x, y + 1});
        }
        if (process2(x, y - 1, llegar)) {
            q.push({x, y - 1});
        }
    }

    return arrives[home.first][home.second].first < INF;
}

ll last_true(ll lo, ll hi) {
	lo--;
	while (lo < hi) {
		ll mid = lo + (hi - lo + 1) / 2;
		if (test(mid)) lo = mid;
		else hi = mid - 1;
	}
	return lo;
}

int main () {
    cin >> N >> M;

    queue<pl> ffill;
    f0r (i, 0, N) {
        f0r (j, 0, N) {
            char a; cin >> a;
            if(a == 'T') grid[i][j] = -1;
            if(a == 'G') grid[i][j] = INF;
            if(a == 'H') {
                grid[i][j] = 0;
                ffill.push({i, j});
            }
            if(a == 'M') {
                grid[i][j] = INF;
                start = {i, j};
            }
            if(a == 'D') {
                grid[i][j] = 1e8;
                home = {i, j};
            }
        }
    }

    while (!ffill.empty()) {
        pl coords = ffill.front();
        ll x, y; tie(x, y) = coords;
        ffill.pop();

        if (process1(x + 1, y, grid[x][y] + 1)) {
            ffill.push({x + 1, y});
        }
        if (process1(x - 1, y, grid[x][y] + 1)) {
            ffill.push({x - 1, y});
        }
        if (process1(x, y + 1, grid[x][y] + 1)) {
            ffill.push({x, y + 1});
        }
        if (process1(x, y - 1, grid[x][y] + 1)) {
            ffill.push({x, y - 1});
        }
    }

    cout << last_true(0, grid[start.first][start.second] - 1) << endl;
}

Subtask #1
54.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Incorrect 0 ms 340 KB Output isn't correct
4 Incorrect 0 ms 340 KB Output isn't correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 80 ms 8644 KB Output is correct
8 Incorrect 1 ms 340 KB Output isn't correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 724 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 696 KB Output is correct
15 Incorrect 1 ms 340 KB Output isn't correct
16 Correct 1 ms 340 KB Output is correct
17 Incorrect 1 ms 468 KB Output isn't correct
18 Correct 1 ms 468 KB Output is correct
19 Incorrect 1 ms 468 KB Output isn't correct
20 Correct 1 ms 468 KB Output is correct
21 Incorrect 1 ms 596 KB Output isn't correct
22 Correct 1 ms 564 KB Output is correct
23 Incorrect 1 ms 596 KB Output isn't correct
24 Correct 1 ms 596 KB Output is correct
25 Incorrect 1 ms 724 KB Output isn't correct
26 Correct 1 ms 724 KB Output is correct
27 Incorrect 1 ms 724 KB Output isn't correct
28 Correct 1 ms 724 KB Output is correct
29 Incorrect 1 ms 820 KB Output isn't correct
30 Correct 1 ms 828 KB Output is correct
31 Incorrect 2 ms 852 KB Output isn't correct
32 Correct 1 ms 852 KB Output is correct
33 Incorrect 10 ms 3696 KB Output isn't correct
34 Correct 10 ms 3712 KB Output is correct
35 Correct 18 ms 3648 KB Output is correct
36 Incorrect 11 ms 4160 KB Output isn't correct
37 Correct 11 ms 4132 KB Output is correct
38 Correct 26 ms 4200 KB Output is correct
39 Incorrect 13 ms 4692 KB Output isn't correct
40 Correct 13 ms 4688 KB Output is correct
41 Correct 33 ms 4732 KB Output is correct
42 Incorrect 17 ms 5204 KB Output isn't correct
43 Correct 16 ms 5188 KB Output is correct
44 Correct 38 ms 5160 KB Output is correct
45 Incorrect 24 ms 5756 KB Output isn't correct
46 Correct 20 ms 5700 KB Output is correct
47 Correct 53 ms 5796 KB Output is correct
48 Incorrect 23 ms 6228 KB Output isn't correct
49 Correct 24 ms 6188 KB Output is correct
50 Correct 53 ms 6276 KB Output is correct
51 Incorrect 27 ms 6784 KB Output isn't correct
52 Correct 27 ms 6780 KB Output is correct
53 Correct 69 ms 6724 KB Output is correct
54 Incorrect 31 ms 7332 KB Output isn't correct
55 Correct 31 ms 7232 KB Output is correct
56 Correct 98 ms 7452 KB Output is correct
57 Incorrect 36 ms 7892 KB Output isn't correct
58 Correct 35 ms 7884 KB Output is correct
59 Correct 87 ms 7780 KB Output is correct
60 Incorrect 40 ms 8416 KB Output isn't correct
61 Correct 39 ms 8412 KB Output is correct
62 Correct 100 ms 8396 KB Output is correct
63 Correct 102 ms 8424 KB Output is correct
64 Correct 152 ms 8332 KB Output is correct
65 Correct 155 ms 8412 KB Output is correct
66 Incorrect 122 ms 8424 KB Output isn't correct
67 Correct 114 ms 8480 KB Output is correct
68 Correct 54 ms 8396 KB Output is correct
69 Correct 50 ms 8488 KB Output is correct
70 Correct 48 ms 8400 KB Output is correct
71 Correct 42 ms 8400 KB Output is correct
72 Correct 45 ms 8464 KB Output is correct
73 Correct 54 ms 8908 KB Output is correct
74 Correct 66 ms 9068 KB Output is correct
75 Correct 59 ms 8980 KB Output is correct
76 Correct 63 ms 8984 KB Output is correct
77 Correct 61 ms 8928 KB Output is correct
78 Correct 64 ms 8808 KB Output is correct
79 Correct 56 ms 8924 KB Output is correct
80 Correct 78 ms 8860 KB Output is correct
81 Correct 71 ms 8916 KB Output is correct
82 Correct 59 ms 8904 KB Output is correct
83 Correct 73 ms 8848 KB Output is correct
84 Correct 63 ms 8748 KB Output is correct
85 Correct 63 ms 8816 KB Output is correct
86 Correct 95 ms 8776 KB Output is correct
87 Correct 63 ms 8836 KB Output is correct
88 Correct 73 ms 8748 KB Output is correct
89 Correct 70 ms 8748 KB Output is correct
90 Correct 74 ms 8736 KB Output is correct
91 Correct 95 ms 8744 KB Output is correct
92 Correct 79 ms 8640 KB Output is correct