oj.uz

Submission #960608

# Submission time Handle Problem Language Result Execution time Memory
960608 2024-04-10T16:59:01 Z LmaoLmao Mecho (IOI09_mecho) C++14
79 / 100
 126 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(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);
            }
        }
    }
  	d[h.fi][h.se] = (int)1e18;
    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
79.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 2 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 2516 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 56 ms 15196 KB Output is correct
8 Incorrect 1 ms 2392 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 2 ms 2652 KB Output is 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 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 1 ms 2648 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 2648 KB Output is correct
26 Correct 1 ms 2648 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 2908 KB Output is correct
32 Correct 1 ms 2908 KB Output is correct
33 Correct 4 ms 6492 KB Output is correct
34 Correct 5 ms 6748 KB Output is correct
35 Correct 13 ms 7120 KB Output is correct
36 Correct 5 ms 6748 KB Output is correct
37 Correct 4 ms 7260 KB Output is correct
38 Correct 19 ms 7592 KB Output is correct
39 Correct 8 ms 9308 KB Output is correct
40 Correct 6 ms 9564 KB Output is correct
41 Correct 21 ms 10052 KB Output is correct
42 Correct 8 ms 9564 KB Output is correct
43 Correct 11 ms 10080 KB Output is correct
44 Correct 30 ms 10588 KB Output is correct
45 Correct 11 ms 9860 KB Output is correct
46 Correct 8 ms 10584 KB Output is correct
47 Correct 32 ms 11100 KB Output is correct
48 Correct 12 ms 10328 KB Output is correct
49 Correct 9 ms 10768 KB Output is correct
50 Correct 38 ms 11352 KB Output is correct
51 Correct 11 ms 10588 KB Output is correct
52 Correct 11 ms 11324 KB Output is correct
53 Correct 44 ms 11868 KB Output is correct
54 Correct 14 ms 13020 KB Output is correct
55 Correct 14 ms 13660 KB Output is correct
56 Correct 55 ms 14172 KB Output is correct
57 Correct 14 ms 13300 KB Output is correct
58 Correct 18 ms 13960 KB Output is correct
59 Correct 67 ms 14684 KB Output is correct
60 Correct 15 ms 13400 KB Output is correct
61 Correct 15 ms 14172 KB Output is correct
62 Correct 108 ms 15000 KB Output is correct
63 Correct 76 ms 14940 KB Output is correct
64 Correct 126 ms 14940 KB Output is correct
65 Correct 110 ms 14940 KB Output is correct
66 Correct 100 ms 15100 KB Output is correct
67 Incorrect 94 ms 15096 KB Output isn't correct
68 Correct 36 ms 14940 KB Output is correct
69 Correct 36 ms 15136 KB Output is correct
70 Correct 32 ms 14940 KB Output is correct
71 Correct 28 ms 15136 KB Output is correct
72 Correct 25 ms 15112 KB Output is correct
73 Correct 30 ms 15260 KB Output is correct
74 Correct 38 ms 15196 KB Output is correct
75 Correct 40 ms 15196 KB Output is correct
76 Correct 40 ms 15440 KB Output is correct
77 Correct 38 ms 15364 KB Output is correct
78 Incorrect 42 ms 15196 KB Output isn't correct
79 Correct 35 ms 15356 KB Output is correct
80 Correct 40 ms 15196 KB Output is correct
81 Correct 47 ms 15196 KB Output is correct
82 Correct 32 ms 15196 KB Output is correct
83 Correct 46 ms 15196 KB Output is correct
84 Correct 44 ms 15196 KB Output is correct
85 Correct 43 ms 15192 KB Output is correct
86 Correct 52 ms 15300 KB Output is correct
87 Correct 50 ms 15204 KB Output is correct
88 Correct 61 ms 15248 KB Output is correct
89 Correct 55 ms 15396 KB Output is correct
90 Correct 49 ms 15192 KB Output is correct
91 Correct 46 ms 15196 KB Output is correct
92 Correct 52 ms 15248 KB Output is correct