답안 #244286

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
244286	2020-07-03T13:58:54 Z	JovanK26	Mecho (IOI09_mecho)	C++14	95 / 100	158 ms	5240 KB

mecho

#include <bits/stdc++.h>

using namespace std;
int n,s;
bool is[801][801];
int tim[801][801];
bool vis[801][801];
struct field
{
    int x,y;
};
vector<field> hives;
field start;
field home;
bool check(int m)
{
     bool visited[801][801];
     for(int i=0;i<n;i++)
     {
         for(int j=0;j<n;j++)
         {
             visited[i][j]=0;
         }
     }
     if(m>=tim[start.x][start.y])return 0;
     queue<pair<field,int> > q;
     q.push(make_pair(start,0));
     while(!q.empty())
    {
        auto x=q.front();
        q.pop();
        field cur=x.first;
        if(cur.x==home.x && cur.y==home.y)return 1;
        int d=x.second;
        visited[cur.x][cur.y]=1;
        if(cur.x+1<n && !visited[cur.x+1][cur.y] && is[cur.x+1][cur.y] && m+(d+1)/s<tim[cur.x+1][cur.y])
        {
            cur.x++;
            visited[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.x--;
        }
        if(cur.x-1>=0 && !visited[cur.x-1][cur.y] && is[cur.x-1][cur.y] && m+(d+1)/s<tim[cur.x-1][cur.y])
        {
            cur.x--;
            visited[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.x++;
        }
        if(cur.y+1<n && !visited[cur.x][cur.y+1] && is[cur.x][cur.y+1] && m+(d+1)/s<tim[cur.x][cur.y+1])
        {
            cur.y++;
            visited[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.y--;
        }
        if(cur.y-1>=0 && !visited[cur.x][cur.y-1] && is[cur.x][cur.y-1] && m+(d+1)/s<tim[cur.x][cur.y-1])
        {
            cur.y--;
            visited[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.y++;
        }
    }
    return 0;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> s;
    char c;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<n;j++)
        {
           cin >> c;
           if(c=='T')
           {
               is[i][j]=0;
           }
           else if(c=='M')
           {
               is[i][j]=1;
               start.x=i;
               start.y=j;
           }
           else if(c=='D')
           {
               is[i][j]=1;
               home.x=i;
               home.y=j;
           }
           else if(c=='H')
           {
               is[i][j]=1;
               field temp;
               temp.x=i;
               temp.y=j;
               hives.push_back(temp);
           }
           else
           {
               is[i][j]=1;
           }
        }
    }
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<n;j++)
        {
            tim[i][j]=1000000000;
        }
    }
    queue<pair<field,int> > q;
    for(int i=0;i<hives.size();i++)
    {
        q.push(make_pair(hives[i],0));
        vis[hives[i].x][hives[i].y]=1;
    }
    while(!q.empty())
    {
        auto x=q.front();
        q.pop();
        field cur=x.first;
        int d=x.second;
        //if(vis[cur.x][cur.y])continue;
        vis[cur.x][cur.y]=1;
        tim[cur.x][cur.y]=min(tim[cur.x][cur.y],d);
        if(cur.x+1<n && !vis[cur.x+1][cur.y] && is[cur.x+1][cur.y])
        {
            cur.x++;
            vis[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.x--;
        }
        if(cur.x-1>=0 && !vis[cur.x-1][cur.y] && is[cur.x-1][cur.y])
        {
            cur.x--;
            vis[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.x++;
        }
        if(cur.y+1<n && !vis[cur.x][cur.y+1] && is[cur.x][cur.y+1])
        {
            cur.y++;
            vis[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.y--;
        }
        if(cur.y-1>=0 && !vis[cur.x][cur.y-1] && is[cur.x][cur.y-1])
        {
            cur.y--;
            vis[cur.x][cur.y]=1;
            q.push(make_pair(cur,d+1));
            cur.y++;
        }
    }
    tim[home.x][home.y]=1000000000;
    int l=0;
    int r=1000000;
    int m;
    int rez=-1;
    while(l<r)
    {
        m=(l+r)/2;
        if(check(m))
        {
            l=m+1;
            rez=max(rez,m);
        }
        else
        {
            r=m;
        }
    }
    cout << rez;
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:117:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<hives.size();i++)
                 ~^~~~~~~~~~~~~

Subtask #1

95.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	512 KB	Output is correct
4	Correct	5 ms	384 KB	Output is correct
5	Correct	5 ms	384 KB	Output is correct
6	Correct	5 ms	384 KB	Output is correct
7	Correct	78 ms	4936 KB	Output is correct
8	Correct	4 ms	384 KB	Output is correct
9	Correct	5 ms	384 KB	Output is correct
10	Correct	5 ms	384 KB	Output is correct
11	Correct	5 ms	384 KB	Output is correct
12	Incorrect	5 ms	640 KB	Output isn't correct
13	Correct	5 ms	640 KB	Output is correct
14	Correct	5 ms	640 KB	Output is correct
15	Correct	5 ms	384 KB	Output is correct
16	Correct	5 ms	512 KB	Output is correct
17	Correct	5 ms	512 KB	Output is correct
18	Correct	5 ms	512 KB	Output is correct
19	Correct	5 ms	512 KB	Output is correct
20	Correct	5 ms	512 KB	Output is correct
21	Correct	5 ms	512 KB	Output is correct
22	Correct	5 ms	560 KB	Output is correct
23	Correct	5 ms	640 KB	Output is correct
24	Correct	5 ms	640 KB	Output is correct
25	Correct	5 ms	640 KB	Output is correct
26	Correct	5 ms	640 KB	Output is correct
27	Correct	5 ms	768 KB	Output is correct
28	Correct	5 ms	640 KB	Output is correct
29	Correct	5 ms	768 KB	Output is correct
30	Correct	5 ms	768 KB	Output is correct
31	Correct	5 ms	768 KB	Output is correct
32	Correct	5 ms	768 KB	Output is correct
33	Correct	10 ms	2304 KB	Output is correct
34	Correct	10 ms	2304 KB	Output is correct
35	Correct	20 ms	2304 KB	Output is correct
36	Correct	11 ms	2560 KB	Output is correct
37	Correct	11 ms	2560 KB	Output is correct
38	Correct	26 ms	2560 KB	Output is correct
39	Correct	13 ms	2816 KB	Output is correct
40	Correct	12 ms	2816 KB	Output is correct
41	Correct	36 ms	2936 KB	Output is correct
42	Correct	16 ms	3072 KB	Output is correct
43	Correct	14 ms	3200 KB	Output is correct
44	Correct	38 ms	3072 KB	Output is correct
45	Correct	17 ms	3328 KB	Output is correct
46	Correct	15 ms	3328 KB	Output is correct
47	Correct	53 ms	3328 KB	Output is correct
48	Correct	18 ms	3584 KB	Output is correct
49	Correct	18 ms	3712 KB	Output is correct
50	Correct	55 ms	3712 KB	Output is correct
51	Correct	22 ms	3968 KB	Output is correct
52	Correct	21 ms	3968 KB	Output is correct
53	Correct	62 ms	3968 KB	Output is correct
54	Correct	23 ms	4224 KB	Output is correct
55	Correct	22 ms	4224 KB	Output is correct
56	Correct	71 ms	4224 KB	Output is correct
57	Correct	30 ms	4472 KB	Output is correct
58	Correct	24 ms	4480 KB	Output is correct
59	Correct	85 ms	4600 KB	Output is correct
60	Correct	28 ms	4736 KB	Output is correct
61	Correct	27 ms	4728 KB	Output is correct
62	Correct	99 ms	4736 KB	Output is correct
63	Correct	105 ms	4728 KB	Output is correct
64	Correct	158 ms	4728 KB	Output is correct
65	Correct	137 ms	4736 KB	Output is correct
66	Correct	126 ms	4728 KB	Output is correct
67	Correct	110 ms	4728 KB	Output is correct
68	Correct	57 ms	4844 KB	Output is correct
69	Correct	57 ms	4728 KB	Output is correct
70	Correct	50 ms	4728 KB	Output is correct
71	Correct	43 ms	4728 KB	Output is correct
72	Correct	43 ms	4728 KB	Output is correct
73	Correct	38 ms	5112 KB	Output is correct
74	Correct	58 ms	5240 KB	Output is correct
75	Correct	62 ms	5120 KB	Output is correct
76	Correct	58 ms	5120 KB	Output is correct
77	Correct	68 ms	5240 KB	Output is correct
78	Correct	86 ms	5240 KB	Output is correct
79	Correct	53 ms	5112 KB	Output is correct
80	Correct	57 ms	5120 KB	Output is correct
81	Correct	66 ms	5112 KB	Output is correct
82	Correct	56 ms	5120 KB	Output is correct
83	Correct	77 ms	4976 KB	Output is correct
84	Correct	64 ms	5112 KB	Output is correct
85	Correct	71 ms	4976 KB	Output is correct
86	Correct	72 ms	4976 KB	Output is correct
87	Correct	76 ms	4984 KB	Output is correct
88	Correct	75 ms	4984 KB	Output is correct
89	Correct	74 ms	4984 KB	Output is correct
90	Correct	86 ms	5112 KB	Output is correct
91	Correct	72 ms	4992 KB	Output is correct
92	Correct	82 ms	4992 KB	Output is correct