oj.uz

Submission #851504

# Submission time Handle Problem Language Result Execution time Memory
851504 2023-09-20T02:42:59 Z abcvuitunggio Mecho (IOI09_mecho) C++17
73 / 100
 177 ms 11744 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
int n,s,dx[4]={1,-1,0,0},dy[4]={0,0,1,-1},d[801][801],d2[801][801];
string m[801];
queue <pair <int, int>> q;
bool check(int x){
    memset(d2,0,sizeof(d2));
    for (int i=0;i<n;i++)
        for (int j=0;j<n;j++)
            if (m[i][j]=='M'){
                q.push({i,j});
                d2[i][j]=1;
            }
    while (!q.empty()){
        auto [i,j]=q.front();
        q.pop();
        for (int k=0;k<4;k++){
            int u=i+dx[k],v=j+dy[k];
            if (min(u,v)>=0&&max(u,v)<n)
                if (m[u][v]!='T'&&(d[u][v]-x*s>d2[i][j]||(d[u][v]-x*s>=d2[i][j]&&m[u][v]=='D'))&&!d2[u][v]){
                    d2[u][v]=d2[i][j]+1;
                    q.push({u,v});
                }
        }
    }
    for (int i=0;i<n;i++)
        for (int j=0;j<n;j++)
            if (m[i][j]=='D')
                return d2[i][j];
}
int32_t main(){
    ios_base::sync_with_stdio(NULL);cin.tie(nullptr);
    cin >> n >> s;
    for (int i=0;i<n;i++){
        cin >> m[i];
        for (int j=0;j<n;j++)
            if (m[i][j]=='H'){
                q.push({i,j});
                d[i][j]=1;
            }
    }
    while (!q.empty()){
        auto [i,j]=q.front();
        q.pop();
        for (int k=0;k<4;k++){
            int u=i+dx[k],v=j+dy[k];
            if (min(u,v)>=0&&max(u,v)<n)
                if (m[u][v]!='T'&&!d[u][v]){
                    d[u][v]=d[i][j]+1;
                    q.push({u,v});
                }
        }
    }
    for (int i=0;i<n;i++)
        for (int j=0;j<n;j++)
            d[i][j]=(d[i][j]-1)*s;
    int l=0,r=1e9,kq=-1;
    while (l<=r){
        int mid=(l+r)>>1;
        if (check(mid)){
            kq=mid;
            l=mid+1;
        }
        else
            r=mid-1;
    }
    cout << kq;
}

Compilation message

mecho.cpp: In function 'bool check(long long int)':
mecho.cpp:31:1: warning: control reaches end of non-void function [-Wreturn-type]
   31 | }
      | ^

Subtask #1
73.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6744 KB Output is correct
2 Incorrect 3 ms 6744 KB Output isn't correct
3 Correct 4 ms 6748 KB Output is correct
4 Incorrect 3 ms 6744 KB Output isn't correct
5 Correct 4 ms 6744 KB Output is correct
6 Incorrect 4 ms 6748 KB Output isn't correct
7 Incorrect 85 ms 11356 KB Output isn't correct
8 Correct 3 ms 6748 KB Output is correct
9 Correct 3 ms 6748 KB Output is correct
10 Correct 4 ms 6748 KB Output is correct
11 Correct 4 ms 6748 KB Output is correct
12 Incorrect 4 ms 6804 KB Output isn't correct
13 Incorrect 4 ms 6748 KB Output isn't correct
14 Correct 4 ms 6748 KB Output is correct
15 Correct 4 ms 6748 KB Output is correct
16 Correct 4 ms 6748 KB Output is correct
17 Correct 4 ms 6800 KB Output is correct
18 Correct 4 ms 6748 KB Output is correct
19 Correct 3 ms 6748 KB Output is correct
20 Correct 3 ms 6748 KB Output is correct
21 Correct 4 ms 6748 KB Output is correct
22 Correct 4 ms 6748 KB Output is correct
23 Correct 3 ms 6748 KB Output is correct
24 Correct 4 ms 6748 KB Output is correct
25 Correct 4 ms 6748 KB Output is correct
26 Correct 3 ms 6748 KB Output is correct
27 Correct 3 ms 6748 KB Output is correct
28 Correct 4 ms 6748 KB Output is correct
29 Correct 4 ms 6808 KB Output is correct
30 Correct 4 ms 6748 KB Output is correct
31 Correct 4 ms 6648 KB Output is correct
32 Correct 3 ms 6748 KB Output is correct
33 Correct 8 ms 8816 KB Output is correct
34 Correct 10 ms 7768 KB Output is correct
35 Correct 23 ms 8796 KB Output is correct
36 Correct 9 ms 8796 KB Output is correct
37 Correct 11 ms 8028 KB Output is correct
38 Correct 28 ms 8796 KB Output is correct
39 Correct 10 ms 9052 KB Output is correct
40 Correct 14 ms 8540 KB Output is correct
41 Correct 37 ms 9052 KB Output is correct
42 Correct 11 ms 9052 KB Output is correct
43 Correct 15 ms 8796 KB Output is correct
44 Correct 46 ms 9096 KB Output is correct
45 Correct 14 ms 9048 KB Output is correct
46 Correct 19 ms 9052 KB Output is correct
47 Correct 55 ms 9048 KB Output is correct
48 Correct 16 ms 9564 KB Output is correct
49 Correct 22 ms 9564 KB Output is correct
50 Correct 67 ms 9564 KB Output is correct
51 Correct 18 ms 9820 KB Output is correct
52 Correct 25 ms 9820 KB Output is correct
53 Correct 78 ms 9820 KB Output is correct
54 Correct 23 ms 10328 KB Output is correct
55 Correct 30 ms 10332 KB Output is correct
56 Correct 122 ms 10400 KB Output is correct
57 Correct 21 ms 10840 KB Output is correct
58 Correct 29 ms 10588 KB Output is correct
59 Correct 103 ms 10588 KB Output is correct
60 Correct 24 ms 11100 KB Output is correct
61 Correct 35 ms 11100 KB Output is correct
62 Correct 153 ms 11188 KB Output is correct
63 Correct 112 ms 11180 KB Output is correct
64 Correct 177 ms 11100 KB Output is correct
65 Correct 162 ms 11176 KB Output is correct
66 Correct 112 ms 11100 KB Output is correct
67 Correct 104 ms 11184 KB Output is correct
68 Correct 59 ms 11096 KB Output is correct
69 Correct 58 ms 11236 KB Output is correct
70 Correct 46 ms 11424 KB Output is correct
71 Correct 50 ms 11232 KB Output is correct
72 Incorrect 54 ms 11356 KB Output isn't correct
73 Incorrect 46 ms 11608 KB Output isn't correct
74 Correct 76 ms 11684 KB Output is correct
75 Correct 74 ms 11744 KB Output is correct
76 Correct 65 ms 11680 KB Output is correct
77 Correct 76 ms 11736 KB Output is correct
78 Correct 69 ms 11608 KB Output is correct
79 Correct 62 ms 11628 KB Output is correct
80 Correct 73 ms 11672 KB Output is correct
81 Correct 72 ms 11612 KB Output is correct
82 Correct 61 ms 11664 KB Output is correct
83 Correct 79 ms 11608 KB Output is correct
84 Correct 75 ms 11612 KB Output is correct
85 Correct 72 ms 11612 KB Output is correct
86 Correct 82 ms 11612 KB Output is correct
87 Correct 83 ms 11596 KB Output is correct
88 Correct 79 ms 11352 KB Output is correct
89 Correct 79 ms 11508 KB Output is correct
90 Correct 101 ms 11356 KB Output is correct
91 Correct 86 ms 11496 KB Output is correct
92 Correct 82 ms 11504 KB Output is correct