oj.uz

Submission #960613

# Submission time Handle Problem Language Result Execution time Memory
960613 2024-04-10T17:10:03 Z LmaoLmao Mecho (IOI09_mecho) C++14
100 / 100
 128 ms 15748 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=0,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
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 2 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 2 ms 2396 KB Output is correct
7 Correct 76 ms 15324 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 2 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 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 2 ms 2396 KB Output is correct
17 Correct 1 ms 2392 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 2904 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2900 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 2904 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 2708 KB Output is correct
29 Correct 1 ms 2648 KB Output is correct
30 Correct 1 ms 2648 KB Output is correct
31 Correct 1 ms 2692 KB Output is correct
32 Correct 1 ms 2908 KB Output is correct
33 Correct 5 ms 6492 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 6884 KB Output is correct
37 Correct 6 ms 7260 KB Output is correct
38 Correct 20 ms 7516 KB Output is correct
39 Correct 6 ms 9304 KB Output is correct
40 Correct 6 ms 9564 KB Output is correct
41 Correct 22 ms 10076 KB Output is correct
42 Correct 7 ms 9564 KB Output is correct
43 Correct 7 ms 10076 KB Output is correct
44 Correct 27 ms 10584 KB Output is correct
45 Correct 9 ms 9816 KB Output is correct
46 Correct 9 ms 10588 KB Output is correct
47 Correct 33 ms 10892 KB Output is correct
48 Correct 12 ms 10256 KB Output is correct
49 Correct 9 ms 10844 KB Output is correct
50 Correct 42 ms 11484 KB Output is correct
51 Correct 11 ms 10584 KB Output is correct
52 Correct 12 ms 11100 KB Output is correct
53 Correct 47 ms 11868 KB Output is correct
54 Correct 13 ms 12888 KB Output is correct
55 Correct 13 ms 13660 KB Output is correct
56 Correct 65 ms 14172 KB Output is correct
57 Correct 15 ms 13144 KB Output is correct
58 Correct 15 ms 13916 KB Output is correct
59 Correct 74 ms 14716 KB Output is correct
60 Correct 14 ms 13656 KB Output is correct
61 Correct 14 ms 14172 KB Output is correct
62 Correct 88 ms 15192 KB Output is correct
63 Correct 77 ms 15104 KB Output is correct
64 Correct 128 ms 15104 KB Output is correct
65 Correct 108 ms 15100 KB Output is correct
66 Correct 107 ms 15184 KB Output is correct
67 Correct 77 ms 14936 KB Output is correct
68 Correct 37 ms 14936 KB Output is correct
69 Correct 40 ms 14940 KB Output is correct
70 Correct 29 ms 14940 KB Output is correct
71 Correct 40 ms 14932 KB Output is correct
72 Correct 31 ms 15192 KB Output is correct
73 Correct 25 ms 15444 KB Output is correct
74 Correct 38 ms 15448 KB Output is correct
75 Correct 42 ms 15400 KB Output is correct
76 Correct 39 ms 15452 KB Output is correct
77 Correct 47 ms 15452 KB Output is correct
78 Correct 45 ms 15388 KB Output is correct
79 Correct 34 ms 15368 KB Output is correct
80 Correct 37 ms 15504 KB Output is correct
81 Correct 53 ms 15532 KB Output is correct
82 Correct 44 ms 15452 KB Output is correct
83 Correct 64 ms 15276 KB Output is correct
84 Correct 44 ms 15748 KB Output is correct
85 Correct 43 ms 15448 KB Output is correct
86 Correct 50 ms 15256 KB Output is correct
87 Correct 48 ms 15448 KB Output is correct
88 Correct 70 ms 15408 KB Output is correct
89 Correct 79 ms 15412 KB Output is correct
90 Correct 49 ms 15204 KB Output is correct
91 Correct 52 ms 15196 KB Output is correct
92 Correct 54 ms 15404 KB Output is correct