oj.uz

Submission #777098

# Submission time Handle Problem Language Result Execution time Memory
777098 2023-07-08T16:26:47 Z Surver Mecho (IOI09_mecho) C++17
20 / 100
 169 ms 6904 KB 
#include<bits/stdc++.h>
using namespace std;

void solve(){
    int n,s;
    cin>>n>>s;
    vector<string> v(n);
    for (int i=0;i<n;i++){
        cin>>v[i];
    }   
    int inf=2000;
    vector<vector<int>> dis(n,vector<int>(n,inf));
    queue<pair<int,int>> q;
    pair<int,int> start={-1,-1};
    pair<int,int> end={-1,-1};
    for (int i=0;i<n;i++){
        for (int j=0;j<n;j++){
            if (v[i][j]=='H'){
                q.push({i,j});
                dis[i][j]=0;
            }
            if (v[i][j]=='M'){
                start={i,j};
            }
            if (v[i][j]=='D'){
                end={i,j};
            }
        }
    }
    auto valid = [&] (int x,int y){
        return x>=0 && x<n && y>=0 && y<n;
    };
    vector<int> dx={0,-1,0,1};
    vector<int> dy={-1,0,1,0};
    while(!q.empty()){
        auto [x,y]=q.front();
        q.pop();
        for (int i=0;i<4;i++){
            if (valid(x+dx[i],y+dy[i]) && dis[x+dx[i]][y+dy[i]]==inf){
                if (v[x+dx[i]][y+dy[i]]=='G'){
                    dis[x+dx[i]][y+dy[i]]=1+dis[x][y];
                    q.push({x+dx[i],y+dy[i]});
                }
                if (v[x+dx[i]][y+dy[i]]=='M' || v[x+dx[i]][y+dy[i]]=='D'){
                    dis[x+dx[i]][y+dy[i]]=1+dis[x][y];
                }
            }
        }
    }
    int low=0,high=inf;
    int ans=-1;
    while(low<=high){
        int mid=(low+high)/2;
        vector<vector<int>> dis2(n,vector<int>(n,inf));
        q.push(start);
        if (mid>=dis[start.first][start.second]){
            q.pop();
        }
        dis2[start.first][start.second]=mid*s;
        while(!q.empty()){
            auto [x,y]=q.front();
            q.pop();
            for (int i=0;i<4;i++){
                if (valid(x+dx[i],y+dy[i])){
                    if ((dis2[x][y]+1)/s<dis[x+dx[i]][y+dy[i]] && dis2[x+dx[i]][y+dy[i]]==inf){
                        dis2[x+dx[i]][y+dy[i]]=1+dis2[x][y];
                        q.push({x+dx[i],y+dy[i]});
                    }
                }
            }
        }
        if (dis2[end.first][end.second]==inf){
            high=mid-1;
        }
        else{
            ans=max(ans,mid);
            low=mid+1;
        }
    }
    cout<<ans<<"\n";
}

int32_t main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t=1;
    while(t--){
        solve();
    }
    return 0;
}

Subtask #1
20.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 1 ms 212 KB Output isn't correct
5 Incorrect 1 ms 212 KB Output isn't correct
6 Incorrect 1 ms 268 KB Output isn't correct
7 Incorrect 78 ms 6744 KB Output isn't correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 316 KB Output is correct
12 Incorrect 1 ms 340 KB Output isn't correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Incorrect 1 ms 212 KB Output isn't correct
17 Correct 1 ms 212 KB Output is correct
18 Incorrect 1 ms 212 KB Output isn't correct
19 Correct 1 ms 212 KB Output is correct
20 Incorrect 1 ms 212 KB Output isn't correct
21 Correct 1 ms 212 KB Output is correct
22 Incorrect 1 ms 340 KB Output isn't correct
23 Correct 1 ms 340 KB Output is correct
24 Incorrect 1 ms 340 KB Output isn't correct
25 Correct 1 ms 340 KB Output is correct
26 Incorrect 1 ms 340 KB Output isn't correct
27 Incorrect 1 ms 340 KB Output isn't correct
28 Incorrect 1 ms 328 KB Output isn't correct
29 Incorrect 1 ms 340 KB Output isn't correct
30 Incorrect 1 ms 340 KB Output isn't correct
31 Incorrect 1 ms 340 KB Output isn't correct
32 Incorrect 1 ms 324 KB Output isn't correct
33 Incorrect 17 ms 1492 KB Output isn't correct
34 Incorrect 32 ms 1492 KB Output isn't correct
35 Incorrect 25 ms 1580 KB Output isn't correct
36 Incorrect 22 ms 1876 KB Output isn't correct
37 Incorrect 40 ms 1876 KB Output isn't correct
38 Incorrect 37 ms 1968 KB Output isn't correct
39 Incorrect 27 ms 2344 KB Output isn't correct
40 Incorrect 51 ms 2364 KB Output isn't correct
41 Incorrect 41 ms 2356 KB Output isn't correct
42 Incorrect 34 ms 2824 KB Output isn't correct
43 Incorrect 63 ms 2772 KB Output isn't correct
44 Incorrect 55 ms 2840 KB Output isn't correct
45 Incorrect 39 ms 3284 KB Output isn't correct
46 Incorrect 81 ms 3272 KB Output isn't correct
47 Incorrect 68 ms 3352 KB Output isn't correct
48 Incorrect 45 ms 3940 KB Output isn't correct
49 Incorrect 94 ms 3932 KB Output isn't correct
50 Incorrect 80 ms 3928 KB Output isn't correct
51 Incorrect 52 ms 4436 KB Output isn't correct
52 Incorrect 107 ms 4544 KB Output isn't correct
53 Incorrect 94 ms 4556 KB Output isn't correct
54 Incorrect 64 ms 5212 KB Output isn't correct
55 Incorrect 128 ms 5196 KB Output isn't correct
56 Incorrect 110 ms 5224 KB Output isn't correct
57 Incorrect 67 ms 5924 KB Output isn't correct
58 Incorrect 143 ms 5832 KB Output isn't correct
59 Incorrect 138 ms 5928 KB Output isn't correct
60 Incorrect 79 ms 6612 KB Output isn't correct
61 Incorrect 169 ms 6720 KB Output isn't correct
62 Incorrect 146 ms 6700 KB Output isn't correct
63 Incorrect 39 ms 6716 KB Output isn't correct
64 Incorrect 88 ms 6720 KB Output isn't correct
65 Incorrect 62 ms 6712 KB Output isn't correct
66 Incorrect 37 ms 6772 KB Output isn't correct
67 Incorrect 57 ms 6772 KB Output isn't correct
68 Incorrect 30 ms 6756 KB Output isn't correct
69 Incorrect 37 ms 6736 KB Output isn't correct
70 Incorrect 32 ms 6756 KB Output isn't correct
71 Incorrect 39 ms 6720 KB Output isn't correct
72 Correct 29 ms 6744 KB Output is correct
73 Correct 35 ms 6732 KB Output is correct
74 Correct 57 ms 6744 KB Output is correct
75 Incorrect 61 ms 6784 KB Output isn't correct
76 Correct 57 ms 6752 KB Output is correct
77 Incorrect 58 ms 6748 KB Output isn't correct
78 Correct 63 ms 6740 KB Output is correct
79 Incorrect 52 ms 6740 KB Output isn't correct
80 Incorrect 57 ms 6740 KB Output isn't correct
81 Incorrect 61 ms 6764 KB Output isn't correct
82 Incorrect 56 ms 6720 KB Output isn't correct
83 Incorrect 72 ms 6744 KB Output isn't correct
84 Correct 65 ms 6740 KB Output is correct
85 Incorrect 65 ms 6740 KB Output isn't correct
86 Incorrect 69 ms 6748 KB Output isn't correct
87 Incorrect 78 ms 6904 KB Output isn't correct
88 Incorrect 74 ms 6728 KB Output isn't correct
89 Correct 74 ms 6724 KB Output is correct
90 Incorrect 77 ms 6704 KB Output isn't correct
91 Incorrect 74 ms 6740 KB Output isn't correct
92 Incorrect 75 ms 6740 KB Output isn't correct