oj.uz

Submission #135481

# Submission time Handle Problem Language Result Execution time Memory
135481 2019-07-24T06:33:13 Z Dilshod_Imomov Mecho (IOI09_mecho) C++17
9 / 100
 1000 ms 17596 KB 
# include <bits/stdc++.h>
# define ll long long
# define fi first
# define se second
# define pb push_back
# define pf push_front
# define For(i, a, b) for( int i = a; i < b; i++ )
# define in insert
# define all(a) a.begin(),a.end()
# define pi pair < int, int >
# define DEBUG
# define readfile(file) freopen ( (file + ".in").c_str(), "r", stdin)
# define writefile(file) freopen ( (file + ".out").c_str(), "w", stdout)
# define speed ios_base::sync_with_stdio(false);cin.tie(NULL)
# define LARGE (1e7)

using namespace std;
void Set_File( string file ){readfile(file);writefile(file);}

int n, s;
string m;
vector < string > forest;
vector < string > forest1;
int step[1000][1000];
int visited[1000][1000];
int x, ans = -1;
pi pos = { -1, -1 };
vector < pi > add = { { 1, 0 }, { -1, 0 }, { 0, 1 }, { 0, -1 } };

int valid ( int i, int j ){
    if ( i >= 0 && i < n && j >= 0 && j < n && forest[i][j] != 'T' ) {
        return 1;
    }
    return 0;
}

void spread_bees(){
    vector < pi > pos;

    For ( i, 0, n ){
        For ( j, 0, n ){
            if ( forest[i][j] == 'H' ) {
                pos.pb({i, j});
            }
        }
    }
    For ( i, 0, pos.size() ){
        For ( j, 0, 4 ){
            pi neighbour = { pos[i].fi + add[j].fi, pos[i].se + add[j].se };
            if ( valid( neighbour.fi, neighbour.se ) && forest[neighbour.fi][neighbour.se] == 'G' && forest[neighbour.fi][neighbour.se] != 'D' ){
                forest[neighbour.fi][neighbour.se] = 'H';
            }
        }
    }
}

int main(){
    /// Author: _Dilshod_
    speed;
    cin >> n >> s;

    For ( i, 0, n ){
        cin >> m;
        forest.pb(m);
        forest1.pb(m);

        if ( pos.fi == -1 ){
            For ( j, 0, m.size() ){
                if ( m[j] == 'M' ){
                    pos = {i, j};
                }
            }
        }
    }
    while ( 1 ){
        int ans1 = -1;
        queue < pi > BFS;
        BFS.push(pos);
        forest = forest1;

        For ( i, 0, 1000 ){
            For ( j, 0, 1000 ){
                step[i][j] = 0;
                visited[i][j] = 0;
            }
        }
        For ( i, 0, x ){
            spread_bees();
        }
        int y = x;
        int z = 0;
        pi loc = pos;
        visited[loc.fi][loc.se] = 1;

        while ( !BFS.empty() ){
            loc = BFS.front();

            if ( step[loc.fi][loc.se] == 0 ){
                spread_bees();
                y++;
            }
            if ( step[loc.fi][loc.se] == 1 && z ){
                z = 0;
                spread_bees();
                y++;
            }
            if ( forest[loc.fi][loc.se] == 'D' ){
                ans1 = max( ans1, x );
                break;
            }
            BFS.pop();

            if ( step[loc.fi][loc.se] == s ){
                if ( forest[loc.fi][loc.se] == 'H' ) {
                    continue;
                }
                step[loc.fi][loc.se] = 0;
            }
            For ( i, 0, 4 ){
                pi to = { loc.fi + add[i].fi, loc.se + add[i].se };

                if ( valid( to.fi, to.se ) && !visited[to.fi][to.se] ) {
                    visited[to.fi][to.se] = 1;

                    if ( step[loc.fi][loc.se] == 2 ) {
                        z++;
                    }
                    step[to.fi][to.se] = step[loc.fi][loc.se] + 1;
                    BFS.push(to);
                }
            }
            if ( BFS.empty() && forest[loc.fi][loc.se] != 'D' ) {
                ans1 = -1;
                break;
            }
        }
        x++;
        ans = max( ans1, ans );

        if ( ans1 == -1 ){
            break;
        }
    }
    cout << ans;
}

Compilation message

mecho.cpp: In function 'void spread_bees()':
mecho.cpp:7:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 # define For(i, a, b) for( int i = a; i < b; i++ )
mecho.cpp:47:11:
     For ( i, 0, pos.size() ){
           ~~~~~~~~~~~~~~~~               
mecho.cpp:47:5: note: in expansion of macro 'For'
     For ( i, 0, pos.size() ){
     ^~~
mecho.cpp: In function 'int main()':
mecho.cpp:7:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 # define For(i, a, b) for( int i = a; i < b; i++ )
mecho.cpp:68:19:
             For ( j, 0, m.size() ){
                   ~~~~~~~~~~~~~~         
mecho.cpp:68:13: note: in expansion of macro 'For'
             For ( j, 0, m.size() ){
             ^~~
mecho.cpp: In function 'void Set_File(std::__cxx11::string)':
mecho.cpp:12:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 # define readfile(file) freopen ( (file + ".in").c_str(), "r", stdin)
                         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:18:30: note: in expansion of macro 'readfile'
 void Set_File( string file ){readfile(file);writefile(file);}
                              ^~~~~~~~
mecho.cpp:13:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 # define writefile(file) freopen ( (file + ".out").c_str(), "w", stdout)
                          ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:18:45: note: in expansion of macro 'writefile'
 void Set_File( string file ){readfile(file);writefile(file);}
                                             ^~~~~~~~~

Subtask #1
9.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 8184 KB Output is correct
2 Incorrect 15 ms 8184 KB Output isn't correct
3 Correct 14 ms 8184 KB Output is correct
4 Incorrect 15 ms 8184 KB Output isn't correct
5 Incorrect 13 ms 8184 KB Output isn't correct
6 Incorrect 15 ms 8184 KB Output isn't correct
7 Execution timed out 1055 ms 16664 KB Time limit exceeded
8 Incorrect 16 ms 8184 KB Output isn't correct
9 Correct 24 ms 8184 KB Output is correct
10 Incorrect 21 ms 8184 KB Output isn't correct
11 Incorrect 22 ms 8312 KB Output isn't correct
12 Execution timed out 1073 ms 8440 KB Time limit exceeded
13 Incorrect 19 ms 8184 KB Output isn't correct
14 Correct 11 ms 8312 KB Output is correct
15 Correct 299 ms 8224 KB Output is correct
16 Incorrect 141 ms 8184 KB Output isn't correct
17 Correct 592 ms 8316 KB Output is correct
18 Incorrect 253 ms 8184 KB Output isn't correct
19 Execution timed out 1062 ms 8440 KB Time limit exceeded
20 Incorrect 398 ms 8212 KB Output isn't correct
21 Execution timed out 1069 ms 8348 KB Time limit exceeded
22 Execution timed out 1070 ms 8440 KB Time limit exceeded
23 Execution timed out 1069 ms 8184 KB Time limit exceeded
24 Execution timed out 1071 ms 8292 KB Time limit exceeded
25 Execution timed out 1074 ms 8236 KB Time limit exceeded
26 Execution timed out 1077 ms 8184 KB Time limit exceeded
27 Execution timed out 1073 ms 8240 KB Time limit exceeded
28 Execution timed out 1086 ms 8184 KB Time limit exceeded
29 Execution timed out 1055 ms 8240 KB Time limit exceeded
30 Execution timed out 1078 ms 8184 KB Time limit exceeded
31 Execution timed out 1069 ms 8316 KB Time limit exceeded
32 Execution timed out 1061 ms 8316 KB Time limit exceeded
33 Execution timed out 1075 ms 8568 KB Time limit exceeded
34 Execution timed out 1068 ms 8648 KB Time limit exceeded
35 Execution timed out 1075 ms 8824 KB Time limit exceeded
36 Execution timed out 1072 ms 8724 KB Time limit exceeded
37 Execution timed out 1077 ms 8696 KB Time limit exceeded
38 Execution timed out 1065 ms 9004 KB Time limit exceeded
39 Execution timed out 1080 ms 8824 KB Time limit exceeded
40 Execution timed out 1086 ms 8952 KB Time limit exceeded
41 Execution timed out 1070 ms 8952 KB Time limit exceeded
42 Execution timed out 1074 ms 8952 KB Time limit exceeded
43 Execution timed out 1037 ms 8952 KB Time limit exceeded
44 Execution timed out 1046 ms 9032 KB Time limit exceeded
45 Execution timed out 1087 ms 9080 KB Time limit exceeded
46 Execution timed out 1082 ms 9080 KB Time limit exceeded
47 Execution timed out 1092 ms 9204 KB Time limit exceeded
48 Execution timed out 1069 ms 9336 KB Time limit exceeded
49 Execution timed out 1077 ms 9336 KB Time limit exceeded
50 Execution timed out 1068 ms 9592 KB Time limit exceeded
51 Execution timed out 1075 ms 9464 KB Time limit exceeded
52 Execution timed out 1078 ms 9464 KB Time limit exceeded
53 Execution timed out 1075 ms 9668 KB Time limit exceeded
54 Execution timed out 1078 ms 9720 KB Time limit exceeded
55 Execution timed out 1079 ms 9720 KB Time limit exceeded
56 Execution timed out 1076 ms 9976 KB Time limit exceeded
57 Execution timed out 1086 ms 9976 KB Time limit exceeded
58 Execution timed out 1074 ms 9976 KB Time limit exceeded
59 Execution timed out 1074 ms 10104 KB Time limit exceeded
60 Execution timed out 1083 ms 10104 KB Time limit exceeded
61 Execution timed out 1077 ms 10108 KB Time limit exceeded
62 Execution timed out 1080 ms 10184 KB Time limit exceeded
63 Execution timed out 1062 ms 10232 KB Time limit exceeded
64 Execution timed out 1081 ms 10336 KB Time limit exceeded
65 Execution timed out 1073 ms 10824 KB Time limit exceeded
66 Execution timed out 1054 ms 11228 KB Time limit exceeded
67 Execution timed out 1066 ms 10236 KB Time limit exceeded
68 Execution timed out 1084 ms 13992 KB Time limit exceeded
69 Execution timed out 1068 ms 11816 KB Time limit exceeded
70 Execution timed out 1079 ms 16580 KB Time limit exceeded
71 Execution timed out 1079 ms 16428 KB Time limit exceeded
72 Execution timed out 1061 ms 12040 KB Time limit exceeded
73 Execution timed out 1069 ms 17464 KB Time limit exceeded
74 Execution timed out 1068 ms 16860 KB Time limit exceeded
75 Execution timed out 1077 ms 17448 KB Time limit exceeded
76 Execution timed out 1076 ms 17324 KB Time limit exceeded
77 Execution timed out 1078 ms 17132 KB Time limit exceeded
78 Execution timed out 1073 ms 17324 KB Time limit exceeded
79 Execution timed out 1069 ms 16604 KB Time limit exceeded
80 Execution timed out 1069 ms 17596 KB Time limit exceeded
81 Execution timed out 1073 ms 17392 KB Time limit exceeded
82 Execution timed out 1068 ms 16988 KB Time limit exceeded
83 Execution timed out 1078 ms 17244 KB Time limit exceeded
84 Execution timed out 1075 ms 16516 KB Time limit exceeded
85 Execution timed out 1079 ms 17140 KB Time limit exceeded
86 Execution timed out 1069 ms 17396 KB Time limit exceeded
87 Execution timed out 1074 ms 17164 KB Time limit exceeded
88 Execution timed out 1084 ms 17164 KB Time limit exceeded
89 Execution timed out 1076 ms 14340 KB Time limit exceeded
90 Execution timed out 1083 ms 17036 KB Time limit exceeded
91 Execution timed out 1062 ms 16704 KB Time limit exceeded
92 Execution timed out 1041 ms 17244 KB Time limit exceeded