oj.uz

Submission #960607

# Submission time Handle Problem Language Result Execution time Memory
960607 2024-04-10T16:57:51 Z LmaoLmao Mecho (IOI09_mecho) C++14
73 / 100
 123 ms 15372 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(ll x) {
  if(d[pos.fi][pos.se]-x*s<=0) return 0;
    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*s>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=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 2648 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Correct 2 ms 2392 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Incorrect 52 ms 15196 KB Output isn't correct
8 Incorrect 1 ms 2396 KB Output isn't correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Incorrect 1 ms 2652 KB Output isn't correct
13 Correct 1 ms 2660 KB Output is correct
14 Incorrect 1 ms 2648 KB Output isn't correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2420 KB Output is correct
18 Correct 1 ms 2392 KB Output is correct
19 Correct 1 ms 2652 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 2648 KB Output is correct
28 Correct 1 ms 2652 KB Output is correct
29 Correct 2 ms 2652 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 4 ms 6580 KB Output is correct
34 Correct 5 ms 6748 KB Output is correct
35 Correct 13 ms 7004 KB Output is correct
36 Correct 5 ms 6748 KB Output is correct
37 Correct 5 ms 7260 KB Output is correct
38 Correct 17 ms 7596 KB Output is correct
39 Correct 6 ms 9304 KB Output is correct
40 Correct 9 ms 9564 KB Output is correct
41 Correct 22 ms 10076 KB Output is correct
42 Correct 8 ms 9564 KB Output is correct
43 Correct 8 ms 10076 KB Output is correct
44 Correct 30 ms 10592 KB Output is correct
45 Correct 8 ms 9820 KB Output is correct
46 Correct 11 ms 10588 KB Output is correct
47 Correct 35 ms 10844 KB Output is correct
48 Correct 10 ms 10328 KB Output is correct
49 Correct 10 ms 10844 KB Output is correct
50 Correct 41 ms 11292 KB Output is correct
51 Correct 11 ms 10584 KB Output is correct
52 Correct 13 ms 11100 KB Output is correct
53 Correct 49 ms 11868 KB Output is correct
54 Correct 14 ms 12888 KB Output is correct
55 Correct 16 ms 13696 KB Output is correct
56 Correct 66 ms 14308 KB Output is correct
57 Correct 14 ms 13148 KB Output is correct
58 Correct 13 ms 13916 KB Output is correct
59 Correct 73 ms 14684 KB Output is correct
60 Correct 15 ms 13404 KB Output is correct
61 Correct 14 ms 14168 KB Output is correct
62 Correct 82 ms 14936 KB Output is correct
63 Correct 77 ms 15100 KB Output is correct
64 Correct 123 ms 15100 KB Output is correct
65 Correct 117 ms 14944 KB Output is correct
66 Correct 108 ms 14936 KB Output is correct
67 Incorrect 77 ms 14940 KB Output isn't correct
68 Correct 40 ms 14928 KB Output is correct
69 Correct 36 ms 14936 KB Output is correct
70 Correct 39 ms 15184 KB Output is correct
71 Correct 28 ms 14932 KB Output is correct
72 Correct 26 ms 14940 KB Output is correct
73 Correct 26 ms 15184 KB Output is correct
74 Correct 47 ms 15204 KB Output is correct
75 Correct 40 ms 15196 KB Output is correct
76 Correct 42 ms 15372 KB Output is correct
77 Correct 42 ms 15364 KB Output is correct
78 Incorrect 43 ms 15196 KB Output isn't correct
79 Correct 35 ms 15136 KB Output is correct
80 Correct 38 ms 15120 KB Output is correct
81 Correct 41 ms 15196 KB Output is correct
82 Correct 36 ms 15196 KB Output is correct
83 Correct 62 ms 15316 KB Output is correct
84 Correct 45 ms 15192 KB Output is correct
85 Correct 51 ms 15192 KB Output is correct
86 Correct 49 ms 15196 KB Output is correct
87 Correct 56 ms 15268 KB Output is correct
88 Correct 49 ms 15248 KB Output is correct
89 Correct 55 ms 15120 KB Output is correct
90 Correct 89 ms 15188 KB Output is correct
91 Correct 46 ms 15244 KB Output is correct
92 Correct 47 ms 15248 KB Output is correct