oj.uz

Submission #960549

# Submission time Handle Problem Language Result Execution time Memory
960549 2024-04-10T15:44:59 Z LmaoLmao Mecho (IOI09_mecho) C++14
61 / 100
 202 ms 15440 KB 
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
 
using ll = long long;
using ii = pair<int, int>;
 
const int N = 1e6+5;
const int INF = 1e9;
 
ll d[1000][1000],m[1000][1000],n,s;
char a[1000][1000];
ll dx[4]={1,0,0,-1};
ll dy[4]={0,1,-1,0};
ii pos,h;
 
bool bfs(int x) {
    queue<ii> q;
    q.push(pos);
    for(int i=0;i<n;i++) {
        for(int j=0;j<n;j++) {
            m[i][j]=0;
        }
    }
    while(!q.empty()) {
        ii u=q.front();
        q.pop();
        for(int i=0;i<4;i++) {
            ii v={u.fi+dx[i],u.se+dy[i]};
            if(v.fi<0 || v.fi>=n || v.se<0 || v.se>=n) continue;
            if(m[v.fi][v.se]==0 && a[v.fi][v.se]!='T' && 
            d[v.fi][v.se]-x>m[u.fi][u.se]+1 && a[v.fi][v.se]!='M') {
                m[v.fi][v.se]=m[u.fi][u.se]+1;
                q.push(v);
            }
        }
    }
    if(m[h.fi][h.se]>0) return 1; else return 0;
}
 
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    queue<ii> q;
    cin >> n >> s;
    for(int i=0;i<n;i++) {
        for(int j=0;j<n;j++) {
            cin >> a[i][j];
            if(a[i][j]=='H') {
                q.push({i,j});
            }
            if(a[i][j]=='M') pos={i,j};
            if(a[i][j]=='D') h={i,j};
        }
    }
    while(!q.empty()) {
        ii u=q.front();
        q.pop();
        for(int i=0;i<4;i++) {
            ii v={u.fi+dx[i],u.se+dy[i]};
            if(v.fi<0 || v.fi>=n || v.se<0 || v.se>=n) continue;
            if(d[v.fi][v.se]==0 && a[v.fi][v.se]!='T' && a[v.fi][v.se]!='H') {
                d[v.fi][v.se]=d[u.fi][u.se]+s;
                q.push(v);
            }
        }
    }
    ll l=0,r=10000000000,ans=-1;
    while(l<=r) {
        int m=(l+r)/2;
        if(bfs(m)) {
            ans=m;
            l=m+1;
        }
        else {
            r=m-1;
        }
    }
    cout << ans/s;
    return 0;
}

Subtask #1
61.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Incorrect 1 ms 2392 KB Output isn't correct
3 Correct 1 ms 2396 KB Output is correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Correct 1 ms 2396 KB Output is correct
6 Incorrect 1 ms 2396 KB Output isn't correct
7 Incorrect 81 ms 15192 KB Output isn't correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Incorrect 1 ms 2652 KB Output isn't correct
13 Incorrect 1 ms 2652 KB Output isn't correct
14 Incorrect 1 ms 2652 KB Output isn't correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2904 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 1 ms 2652 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 1 ms 2648 KB Output is correct
29 Correct 1 ms 2648 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2908 KB Output is correct
32 Correct 1 ms 2908 KB Output is correct
33 Correct 6 ms 6492 KB Output is correct
34 Correct 5 ms 7000 KB Output is correct
35 Correct 23 ms 7004 KB Output is correct
36 Correct 6 ms 6748 KB Output is correct
37 Correct 6 ms 7260 KB Output is correct
38 Correct 29 ms 7516 KB Output is correct
39 Correct 7 ms 9308 KB Output is correct
40 Correct 6 ms 9608 KB Output is correct
41 Correct 37 ms 10072 KB Output is correct
42 Correct 8 ms 9564 KB Output is correct
43 Correct 8 ms 10324 KB Output is correct
44 Correct 50 ms 10720 KB Output is correct
45 Correct 10 ms 9816 KB Output is correct
46 Correct 11 ms 10584 KB Output is correct
47 Correct 61 ms 11096 KB Output is correct
48 Correct 10 ms 10368 KB Output is correct
49 Correct 11 ms 10844 KB Output is correct
50 Correct 81 ms 11480 KB Output is correct
51 Correct 12 ms 10588 KB Output is correct
52 Correct 12 ms 11140 KB Output is correct
53 Correct 95 ms 11868 KB Output is correct
54 Correct 14 ms 12888 KB Output is correct
55 Correct 15 ms 13676 KB Output is correct
56 Correct 114 ms 14324 KB Output is correct
57 Correct 16 ms 13120 KB Output is correct
58 Correct 15 ms 13952 KB Output is correct
59 Correct 125 ms 14708 KB Output is correct
60 Correct 21 ms 13532 KB Output is correct
61 Correct 18 ms 14376 KB Output is correct
62 Correct 149 ms 15100 KB Output is correct
63 Correct 81 ms 15096 KB Output is correct
64 Correct 202 ms 14940 KB Output is correct
65 Correct 124 ms 14932 KB Output is correct
66 Correct 99 ms 15096 KB Output is correct
67 Incorrect 93 ms 15096 KB Output isn't correct
68 Correct 51 ms 14936 KB Output is correct
69 Correct 59 ms 15132 KB Output is correct
70 Correct 37 ms 14932 KB Output is correct
71 Correct 30 ms 14876 KB Output is correct
72 Incorrect 28 ms 14940 KB Output isn't correct
73 Incorrect 29 ms 15196 KB Output isn't correct
74 Correct 58 ms 15196 KB Output is correct
75 Correct 51 ms 15196 KB Output is correct
76 Correct 51 ms 15196 KB Output is correct
77 Correct 53 ms 15196 KB Output is correct
78 Incorrect 58 ms 15196 KB Output isn't correct
79 Correct 60 ms 15192 KB Output is correct
80 Correct 52 ms 15336 KB Output is correct
81 Correct 51 ms 15192 KB Output is correct
82 Correct 45 ms 15360 KB Output is correct
83 Correct 69 ms 15300 KB Output is correct
84 Correct 68 ms 15196 KB Output is correct
85 Correct 65 ms 15296 KB Output is correct
86 Correct 71 ms 15440 KB Output is correct
87 Correct 61 ms 15196 KB Output is correct
88 Correct 64 ms 15196 KB Output is correct
89 Correct 92 ms 15192 KB Output is correct
90 Correct 75 ms 15244 KB Output is correct
91 Correct 79 ms 15348 KB Output is correct
92 Correct 66 ms 15196 KB Output is correct