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Submission #948095

# Submission time Handle Problem Language Result Execution time Memory
948095 2024-03-17T15:15:37 Z Kongggwp Mecho (IOI09_mecho) C++14
100 / 100
 234 ms 11548 KB 
#include<bits/stdc++.h>
using namespace std;
int dx[] = {0,1,0,-1} , dy[] = {1,0,-1,0} ,x ,y , st ,N , si , sj , fi , fj;
const int n=801;
char s[n][n];
vector<vector<int>>timebee(n , vector<int>(n,INT_MAX));
vector<vector<int>>timebear(n , vector<int>(n,INT_MAX));
vector<vector<int>>visbee(n , vector<int>(n,0));
queue<pair<pair<int,int>,int>>qbear,qbee;
int check(int m)
{
    if(m>=timebee[si][sj])return 0;
    while(!qbear.empty())qbear.pop();
    for(int i=0 ; i<N ; i++)for(int j=0 ; j<N ; j++)timebear[i][j]=INT_MAX;
    vector<vector<int>>visbear(N , vector<int>(N,0));
    qbear.push({{si,sj},0});
    timebear[si][sj] = m;
    visbear[si][sj] = 1;
    while(!qbear.empty())
    {
        int r = qbear.front().first.first , c = qbear.front().first.second , time = qbear.front().second;
        qbear.pop();
        for(int i=0 ; i<4 ; i++)
        {
            int nr = r+dx[i];
            int nc = c+dy[i];
            if(nr<0 or nr>=N or nc<0 or nc>=N or s[nr][nc]=='T' or visbear[nr][nc]==1)continue;
            if((time+1)%st==0)timebear[nr][nc]=timebear[r][c]+1;
            else timebear[nr][nc]=timebear[r][c];
            if(timebee[nr][nc]<=timebear[nr][nc])continue;
            visbear[nr][nc]=1;
            qbear.push({{nr,nc},time+1});
        }
    }
    if(timebear[fi][fj]!=INT_MAX)return 1;
    else return 0;
}
 
int main()
{
    cin >> N >> st;
    for(int i=0 ; i<N ; i++)
    {
        for(int j=0 ; j<N ; j++)
        {
            cin >> s[i][j];
            if(s[i][j]=='M')
            {
                si=i;
                sj=j;
            }
            if(s[i][j]=='D')
            {
                fi=i;
                fj=j;
            }
            if(s[i][j]=='H')
            {
                qbee.push({{i,j},0});
                visbee[i][j] = 1;
                timebee[i][j]=0;
            }
        }
    }
    while(!qbee.empty())
    {
        int r = qbee.front().first.first , c = qbee.front().first.second , time = qbee.front().second;
        qbee.pop();
        for(int i=0 ; i<4 ; i++)
        {
            int nr = r+dx[i];
            int nc = c+dy[i];
            if(nr<0 or nr>=N or nc<0 or nc>=N or s[nr][nc]=='D' or s[nr][nc]=='T' or visbee[nr][nc])continue;
            visbee[nr][nc]=1;
            timebee[nr][nc] = time+1;
            qbee.push({{nr,nc},timebee[nr][nc]});
        }
    }
    int l=0 ,r=N*N , m ,ans=-1;
    while(l<=r)
    {
        m=l+(r-l)/2;
        if(check(m))ans=m , l=m+1;
        else r=m-1;
    }
    cout << ans ;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8028 KB Output is correct
2 Correct 4 ms 8028 KB Output is correct
3 Correct 4 ms 8028 KB Output is correct
4 Correct 4 ms 8028 KB Output is correct
5 Correct 4 ms 8028 KB Output is correct
6 Correct 4 ms 8028 KB Output is correct
7 Correct 94 ms 11220 KB Output is correct
8 Correct 4 ms 8028 KB Output is correct
9 Correct 4 ms 8024 KB Output is correct
10 Correct 4 ms 8028 KB Output is correct
11 Correct 4 ms 8028 KB Output is correct
12 Correct 4 ms 8028 KB Output is correct
13 Correct 4 ms 8028 KB Output is correct
14 Correct 4 ms 8028 KB Output is correct
15 Correct 4 ms 8060 KB Output is correct
16 Correct 4 ms 8028 KB Output is correct
17 Correct 4 ms 8028 KB Output is correct
18 Correct 4 ms 8028 KB Output is correct
19 Correct 4 ms 8028 KB Output is correct
20 Correct 4 ms 8028 KB Output is correct
21 Correct 5 ms 8028 KB Output is correct
22 Correct 4 ms 8088 KB Output is correct
23 Correct 4 ms 8028 KB Output is correct
24 Correct 4 ms 8028 KB Output is correct
25 Correct 4 ms 8028 KB Output is correct
26 Correct 5 ms 8028 KB Output is correct
27 Correct 4 ms 8028 KB Output is correct
28 Correct 4 ms 8028 KB Output is correct
29 Correct 4 ms 8028 KB Output is correct
30 Correct 5 ms 8028 KB Output is correct
31 Correct 4 ms 8028 KB Output is correct
32 Correct 4 ms 8028 KB Output is correct
33 Correct 12 ms 8816 KB Output is correct
34 Correct 13 ms 8832 KB Output is correct
35 Correct 25 ms 8808 KB Output is correct
36 Correct 14 ms 8792 KB Output is correct
37 Correct 19 ms 9052 KB Output is correct
38 Correct 33 ms 8824 KB Output is correct
39 Correct 25 ms 9192 KB Output is correct
40 Correct 18 ms 9200 KB Output is correct
41 Correct 44 ms 9168 KB Output is correct
42 Correct 23 ms 9440 KB Output is correct
43 Correct 22 ms 9432 KB Output is correct
44 Correct 50 ms 9412 KB Output is correct
45 Correct 36 ms 9696 KB Output is correct
46 Correct 26 ms 9676 KB Output is correct
47 Correct 58 ms 9660 KB Output is correct
48 Correct 32 ms 9976 KB Output is correct
49 Correct 29 ms 9956 KB Output is correct
50 Correct 69 ms 9928 KB Output is correct
51 Correct 36 ms 10268 KB Output is correct
52 Correct 37 ms 10328 KB Output is correct
53 Correct 90 ms 10100 KB Output is correct
54 Correct 41 ms 10580 KB Output is correct
55 Correct 40 ms 10536 KB Output is correct
56 Correct 101 ms 10556 KB Output is correct
57 Correct 46 ms 10868 KB Output is correct
58 Correct 70 ms 10868 KB Output is correct
59 Correct 111 ms 10876 KB Output is correct
60 Correct 52 ms 11248 KB Output is correct
61 Correct 67 ms 11188 KB Output is correct
62 Correct 161 ms 11216 KB Output is correct
63 Correct 127 ms 11216 KB Output is correct
64 Correct 234 ms 11204 KB Output is correct
65 Correct 160 ms 11204 KB Output is correct
66 Correct 128 ms 11240 KB Output is correct
67 Correct 125 ms 11212 KB Output is correct
68 Correct 72 ms 11196 KB Output is correct
69 Correct 78 ms 11244 KB Output is correct
70 Correct 58 ms 11224 KB Output is correct
71 Correct 69 ms 11232 KB Output is correct
72 Correct 50 ms 11188 KB Output is correct
73 Correct 62 ms 11088 KB Output is correct
74 Correct 95 ms 11364 KB Output is correct
75 Correct 88 ms 11264 KB Output is correct
76 Correct 79 ms 11236 KB Output is correct
77 Correct 75 ms 11244 KB Output is correct
78 Correct 90 ms 11548 KB Output is correct
79 Correct 67 ms 11244 KB Output is correct
80 Correct 77 ms 11228 KB Output is correct
81 Correct 87 ms 11248 KB Output is correct
82 Correct 80 ms 11240 KB Output is correct
83 Correct 86 ms 11200 KB Output is correct
84 Correct 81 ms 11240 KB Output is correct
85 Correct 89 ms 11220 KB Output is correct
86 Correct 90 ms 11220 KB Output is correct
87 Correct 91 ms 11224 KB Output is correct
88 Correct 90 ms 11224 KB Output is correct
89 Correct 90 ms 11228 KB Output is correct
90 Correct 96 ms 11224 KB Output is correct
91 Correct 90 ms 11224 KB Output is correct
92 Correct 101 ms 11208 KB Output is correct