oj.uz

Submission #960609

# Submission time Handle Problem Language Result Execution time Memory
960609 2024-04-10T17:00:03 Z LmaoLmao Mecho (IOI09_mecho) C++14
79 / 100
 119 ms 15652 KB 
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
 
using ll = long long;
using ii = pair<ll, ll>;
 
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' && a[v.fi][v.se]!='D') {
                d[v.fi][v.se]=d[u.fi][u.se]+s;
                q.push(v);
            }
        }
    }
    d[h.fi][h.se] = (int)1e18;
    ll l=1,r=10000000,ans=-1;
    while(l<=r) {
        ll m=(l+r)/2;
        if(bfs(m)) {
            ans=m;
            l=m+1;
        }
        else {
            r=m-1;
        }
    }
    cout << ans;
    return 0;
}

Subtask #1
79.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Incorrect 1 ms 2396 KB Output isn't correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 50 ms 15196 KB Output is 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 Correct 1 ms 2708 KB Output is 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 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 2648 KB Output is correct
24 Correct 1 ms 2648 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 2652 KB Output is correct
32 Correct 1 ms 2908 KB Output is correct
33 Correct 4 ms 6492 KB Output is correct
34 Correct 4 ms 6748 KB Output is correct
35 Correct 14 ms 7124 KB Output is correct
36 Correct 5 ms 6748 KB Output is correct
37 Correct 4 ms 7260 KB Output is correct
38 Correct 18 ms 7544 KB Output is correct
39 Correct 6 ms 9304 KB Output is correct
40 Correct 6 ms 9564 KB Output is correct
41 Correct 23 ms 10072 KB Output is correct
42 Correct 8 ms 9860 KB Output is correct
43 Correct 11 ms 10188 KB Output is correct
44 Correct 28 ms 10588 KB Output is correct
45 Correct 9 ms 9816 KB Output is correct
46 Correct 10 ms 10832 KB Output is correct
47 Correct 32 ms 11096 KB Output is correct
48 Correct 9 ms 10164 KB Output is correct
49 Correct 9 ms 10708 KB Output is correct
50 Correct 41 ms 11344 KB Output is correct
51 Correct 12 ms 10636 KB Output is correct
52 Correct 11 ms 11100 KB Output is correct
53 Correct 56 ms 11868 KB Output is correct
54 Correct 13 ms 12892 KB Output is correct
55 Correct 18 ms 13660 KB Output is correct
56 Correct 63 ms 14168 KB Output is correct
57 Correct 15 ms 13148 KB Output is correct
58 Correct 15 ms 13960 KB Output is correct
59 Correct 75 ms 14712 KB Output is correct
60 Correct 15 ms 13608 KB Output is correct
61 Correct 15 ms 14372 KB Output is correct
62 Correct 87 ms 15104 KB Output is correct
63 Incorrect 73 ms 14936 KB Output isn't correct
64 Correct 108 ms 14940 KB Output is correct
65 Correct 119 ms 15108 KB Output is correct
66 Correct 90 ms 15100 KB Output is correct
67 Correct 79 ms 14936 KB Output is correct
68 Incorrect 37 ms 14928 KB Output isn't correct
69 Correct 36 ms 14936 KB Output is correct
70 Correct 41 ms 15416 KB Output is correct
71 Correct 32 ms 14928 KB Output is correct
72 Correct 30 ms 15144 KB Output is correct
73 Correct 26 ms 15452 KB Output is correct
74 Correct 36 ms 15652 KB Output is correct
75 Correct 44 ms 15400 KB Output is correct
76 Correct 41 ms 15452 KB Output is correct
77 Correct 46 ms 15640 KB Output is correct
78 Correct 47 ms 15452 KB Output is correct
79 Correct 36 ms 15436 KB Output is correct
80 Correct 40 ms 15452 KB Output is correct
81 Correct 47 ms 15452 KB Output is correct
82 Correct 44 ms 15600 KB Output is correct
83 Incorrect 48 ms 15440 KB Output isn't correct
84 Correct 44 ms 15508 KB Output is correct
85 Correct 62 ms 15512 KB Output is correct
86 Correct 49 ms 15448 KB Output is correct
87 Correct 50 ms 15524 KB Output is correct
88 Incorrect 50 ms 15192 KB Output isn't correct
89 Correct 48 ms 15196 KB Output is correct
90 Correct 59 ms 15192 KB Output is correct
91 Correct 58 ms 15408 KB Output is correct
92 Correct 49 ms 15192 KB Output is correct