oj.uz

Submission #960506

# Submission time Handle Problem Language Result Execution time Memory
960506 2024-04-10T14:38:15 Z LmaoLmao Mecho (IOI09_mecho) C++14
73 / 100
 116 ms 8276 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;

int d[1000][1000],m[1000][1000],n,s;
char a[1000][1000];
int dx[4]={1,0,0,-1};
int 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)/s && 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]+1;
                q.push(v);
            }
        }
    }
    int l=0,r=1000000,ans=-1;
    while(l<=r) {
        int m=(l+r)/2;
        if(bfs(m)) {
            ans=m;
            l=m+1;
        }
        else {
            r=m-1;
        }
    }
    cout << ans;
    return 0;
}

Subtask #1
73.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 0 ms 2396 KB Output isn't correct
3 Correct 1 ms 2396 KB Output is correct
4 Incorrect 1 ms 2392 KB Output isn't correct
5 Correct 1 ms 2396 KB Output is correct
6 Incorrect 2 ms 2396 KB Output isn't correct
7 Incorrect 50 ms 7772 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 2392 KB Output is correct
11 Correct 1 ms 2396 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 Correct 1 ms 2652 KB Output is 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 2648 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 2652 KB Output is correct
29 Correct 1 ms 2652 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2648 KB Output is correct
32 Correct 1 ms 2652 KB Output is correct
33 Correct 6 ms 6112 KB Output is correct
34 Correct 4 ms 5980 KB Output is correct
35 Correct 13 ms 6112 KB Output is correct
36 Correct 4 ms 6236 KB Output is correct
37 Correct 7 ms 6236 KB Output is correct
38 Correct 17 ms 6236 KB Output is correct
39 Correct 6 ms 6488 KB Output is correct
40 Correct 6 ms 6492 KB Output is correct
41 Correct 22 ms 6492 KB Output is correct
42 Correct 7 ms 6492 KB Output is correct
43 Correct 7 ms 6492 KB Output is correct
44 Correct 28 ms 6492 KB Output is correct
45 Correct 8 ms 6748 KB Output is correct
46 Correct 7 ms 6748 KB Output is correct
47 Correct 33 ms 6900 KB Output is correct
48 Correct 9 ms 7004 KB Output is correct
49 Correct 9 ms 7004 KB Output is correct
50 Correct 39 ms 7072 KB Output is correct
51 Correct 12 ms 7540 KB Output is correct
52 Correct 10 ms 7140 KB Output is correct
53 Correct 46 ms 7260 KB Output is correct
54 Correct 13 ms 7440 KB Output is correct
55 Correct 13 ms 7488 KB Output is correct
56 Correct 56 ms 7260 KB Output is correct
57 Correct 13 ms 7512 KB Output is correct
58 Correct 12 ms 7516 KB Output is correct
59 Correct 60 ms 7516 KB Output is correct
60 Correct 14 ms 7772 KB Output is correct
61 Correct 13 ms 7772 KB Output is correct
62 Correct 77 ms 7856 KB Output is correct
63 Correct 73 ms 7860 KB Output is correct
64 Correct 116 ms 7860 KB Output is correct
65 Correct 112 ms 7764 KB Output is correct
66 Correct 93 ms 7860 KB Output is correct
67 Correct 72 ms 7864 KB Output is correct
68 Correct 34 ms 7884 KB Output is correct
69 Correct 41 ms 7768 KB Output is correct
70 Correct 30 ms 7772 KB Output is correct
71 Correct 25 ms 7636 KB Output is correct
72 Incorrect 25 ms 7772 KB Output isn't correct
73 Incorrect 31 ms 8276 KB Output isn't correct
74 Correct 37 ms 8028 KB Output is correct
75 Correct 41 ms 8028 KB Output is correct
76 Correct 38 ms 8028 KB Output is correct
77 Correct 49 ms 8152 KB Output is correct
78 Correct 41 ms 8080 KB Output is correct
79 Correct 34 ms 8080 KB Output is correct
80 Correct 37 ms 8024 KB Output is correct
81 Correct 42 ms 8020 KB Output is correct
82 Correct 35 ms 8024 KB Output is correct
83 Correct 46 ms 8028 KB Output is correct
84 Correct 42 ms 7820 KB Output is correct
85 Correct 41 ms 8024 KB Output is correct
86 Correct 45 ms 8076 KB Output is correct
87 Correct 43 ms 8016 KB Output is correct
88 Correct 45 ms 8016 KB Output is correct
89 Correct 46 ms 8028 KB Output is correct
90 Correct 51 ms 8024 KB Output is correct
91 Correct 46 ms 8012 KB Output is correct
92 Correct 48 ms 8024 KB Output is correct