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Submission #553230

# Submission time Handle Problem Language Result Execution time Memory
553230 2022-04-25T07:00:09 Z amirallisson Mecho (IOI09_mecho) C++14
84 / 100
 148 ms 7636 KB 
#include <bits/stdc++.h>
/*--------------------------------------------------------------------*/
#define INF 3*100*1000 + 5
#define MAX 1000000
#define pb push_back
#define fi first
#define se second
#define pii pair<int, int>
#define vi vector<int>
#define vvi vector<vector<int>>
#define intt int64_t
#define piic pair<int64_t, int64_t>
typedef long long ll;
using namespace std;

/*--------------------------------------------------------------------*/

int n, s;
pii b, home;
queue<pii> hives;
vector<string> grid;
int filltime[900][900]{INT_MAX}, beetime[900][900], visited[900][900];
int dx[4]{1, -1, 0, 0}, dy[4]{0, 0, 1, -1};
int inside(int x, int y){
    return (x> -1 && x < n && y > -1 && y < n && grid[x][y] != 'T');
}



int main(int argc, const char * argv[]) {
    ios::sync_with_stdio(0); cin.tie(0);
    fill(filltime[0], filltime[0] + 900*900, INT_MAX);

    if(2 >= INT_MAX) cout << "Error\n";

    cin >> n >> s;
    for(int i = 0; i < n; ++i){
        string str;
        cin >> str;
        grid.pb(str);
        for(int j = 0; j < str.length(); ++j){
            if (str[j] == 'M') b = make_pair(i, j);
            if (str[j] == 'D') home = make_pair(i, j);
            if(str[j] == 'H'){
                    hives.push(make_pair(i, j));
                    filltime[i][j] = 0;
            }
        }
    }
    while(!hives.empty()){
        pii bee = hives.front();
        hives.pop();
        int x,y;
        x = bee.fi; y = bee.se;

        for(int i = 0; i < 4; ++i){
            if(!inside(x + dx[i], y + dy[i]) || grid[x+dx[i]][y+dy[i]] == 'D') continue;
            if(filltime[x+dx[i]][y+dy[i]] != INT_MAX)
                filltime[x+dx[i]][y+dy[i]] = min(filltime[x+dx[i]][y+dy[i]], filltime[x][y] + 1);
            else {
                filltime[x+dx[i]][y+dy[i]] = filltime[x][y] + 1;
                hives.push(make_pair(x + dx[i], y + dy[i]));
            }
        }
    }

    int lo = 0, hi = filltime[b.fi][b.se];
    int ans = 0;
   while(lo < hi){
        queue<tuple<int, int, int, int>> q;
        int tempans = lo + (hi-lo)/2;
        bool pos = false;
        fill(visited[0], visited[0] + 900*900, 0);
        visited[b.fi][b.se] = 1;
        q.push(make_tuple(b.fi, b.se, tempans, 0));
       // cout << "New Round "  << tempans << '\n';
        while(!q.empty()){
            tuple<int, int, int, int> cur = q.front();
            q.pop();
            int x = get<0>(cur);
            int y = get<1> (cur);
            int a = get<2> (cur);
            int res = get<3> (cur);

            //cout << x << ' ' << y << ' ' << a << ' ' << res << ' ' << q.size() << ' ' << filltime[x][y] << '\n';

            if(a + (double)res/s >= filltime[x][y]) continue;
            if(x == home.fi && y == home.se) {
                pos = true;
              //  cout << "Success!\n";
                break;
            }
            int x1, y1;
            if(res == s-1) {
                y1 = 0;
                x1 = a + 1;
            } else {
                x1 = a;
                y1 = res + 1;
            }
            for(int i = 0; i < 4; ++i) {
                if(!inside(x+dx[i],y+dy[i])) continue;
                if(visited[x+dx[i]][y+dy[i]]) continue;
                visited[x+dx[i]][y+dy[i]] = 1;
                q.push(make_tuple(x+dx[i], y+dy[i], x1, y1));
            }
        }
       // cout << pos << '\n';
        if(pos) {
            ans = max(ans, tempans);
            lo = tempans + 1;
        } else {
            hi = tempans;
        }
    }

    cout << ans << '\n';

    return 0;

}

Compilation message

mecho.cpp: In function 'int main(int, const char**)':
mecho.cpp:41:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         for(int j = 0; j < str.length(); ++j){
      |                        ~~^~~~~~~~~~~~~~

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6612 KB Output is correct
2 Correct 4 ms 6612 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 4 ms 6660 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 5 ms 6612 KB Output is correct
7 Correct 74 ms 7468 KB Output is correct
8 Incorrect 4 ms 6612 KB Output isn't correct
9 Correct 4 ms 6612 KB Output is correct
10 Correct 4 ms 6612 KB Output is correct
11 Correct 4 ms 6612 KB Output is correct
12 Correct 4 ms 6612 KB Output is correct
13 Correct 4 ms 6612 KB Output is correct
14 Incorrect 4 ms 6644 KB Output isn't correct
15 Correct 4 ms 6612 KB Output is correct
16 Correct 4 ms 6612 KB Output is correct
17 Correct 4 ms 6612 KB Output is correct
18 Correct 4 ms 6612 KB Output is correct
19 Correct 5 ms 6612 KB Output is correct
20 Correct 4 ms 6612 KB Output is correct
21 Correct 4 ms 6612 KB Output is correct
22 Correct 4 ms 6612 KB Output is correct
23 Correct 4 ms 6612 KB Output is correct
24 Correct 4 ms 6668 KB Output is correct
25 Correct 4 ms 6612 KB Output is correct
26 Correct 4 ms 6612 KB Output is correct
27 Correct 4 ms 6612 KB Output is correct
28 Correct 5 ms 6612 KB Output is correct
29 Correct 4 ms 6612 KB Output is correct
30 Correct 4 ms 6612 KB Output is correct
31 Correct 4 ms 6612 KB Output is correct
32 Correct 5 ms 6612 KB Output is correct
33 Correct 7 ms 6720 KB Output is correct
34 Correct 7 ms 6716 KB Output is correct
35 Correct 18 ms 6720 KB Output is correct
36 Correct 7 ms 6836 KB Output is correct
37 Correct 7 ms 6740 KB Output is correct
38 Correct 24 ms 6848 KB Output is correct
39 Correct 8 ms 6868 KB Output is correct
40 Correct 9 ms 6864 KB Output is correct
41 Correct 28 ms 6816 KB Output is correct
42 Correct 8 ms 6956 KB Output is correct
43 Correct 8 ms 6868 KB Output is correct
44 Correct 34 ms 6868 KB Output is correct
45 Correct 9 ms 6996 KB Output is correct
46 Correct 9 ms 7008 KB Output is correct
47 Correct 42 ms 7000 KB Output is correct
48 Correct 9 ms 6996 KB Output is correct
49 Correct 10 ms 7012 KB Output is correct
50 Correct 58 ms 6996 KB Output is correct
51 Correct 13 ms 7152 KB Output is correct
52 Correct 11 ms 7144 KB Output is correct
53 Correct 68 ms 7140 KB Output is correct
54 Correct 11 ms 7124 KB Output is correct
55 Correct 11 ms 7124 KB Output is correct
56 Correct 64 ms 7124 KB Output is correct
57 Correct 12 ms 7252 KB Output is correct
58 Correct 12 ms 7252 KB Output is correct
59 Correct 74 ms 7284 KB Output is correct
60 Correct 13 ms 7260 KB Output is correct
61 Correct 12 ms 7272 KB Output is correct
62 Correct 94 ms 7356 KB Output is correct
63 Correct 89 ms 7348 KB Output is correct
64 Correct 142 ms 7244 KB Output is correct
65 Correct 148 ms 7352 KB Output is correct
66 Correct 119 ms 7356 KB Output is correct
67 Incorrect 108 ms 7268 KB Output isn't correct
68 Correct 44 ms 7376 KB Output is correct
69 Correct 35 ms 7288 KB Output is correct
70 Correct 33 ms 7372 KB Output is correct
71 Correct 36 ms 7380 KB Output is correct
72 Correct 30 ms 7284 KB Output is correct
73 Correct 28 ms 7548 KB Output is correct
74 Correct 56 ms 7540 KB Output is correct
75 Correct 54 ms 7536 KB Output is correct
76 Correct 54 ms 7636 KB Output is correct
77 Correct 53 ms 7636 KB Output is correct
78 Incorrect 88 ms 7520 KB Output isn't correct
79 Correct 47 ms 7512 KB Output is correct
80 Correct 51 ms 7624 KB Output is correct
81 Correct 61 ms 7496 KB Output is correct
82 Correct 50 ms 7600 KB Output is correct
83 Correct 70 ms 7632 KB Output is correct
84 Correct 58 ms 7480 KB Output is correct
85 Correct 63 ms 7484 KB Output is correct
86 Correct 74 ms 7556 KB Output is correct
87 Correct 63 ms 7468 KB Output is correct
88 Correct 69 ms 7500 KB Output is correct
89 Correct 74 ms 7516 KB Output is correct
90 Correct 73 ms 7512 KB Output is correct
91 Correct 65 ms 7500 KB Output is correct
92 Correct 72 ms 7484 KB Output is correct