oj.uz

Submission #960558

# Submission time Handle Problem Language Result Execution time Memory
960558 2024-04-10T15:52:21 Z LmaoLmao Mecho (IOI09_mecho) C++14
61 / 100
 225 ms 15464 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) {
    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 && 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=10000000000,ans=-1;
    while(l<=r) {
        ll m=(l+r)/2;
        if(bfs(m)) {
            ans=m;
            l=m+1;
        }
        else {
            r=m-1;
        }
    }
    cout << ans/s;
    return 0;
}

Subtask #1
61.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Incorrect 0 ms 2396 KB Output isn't correct
3 Correct 0 ms 2396 KB Output is correct
4 Incorrect 1 ms 2648 KB Output isn't correct
5 Correct 1 ms 2392 KB Output is correct
6 Incorrect 1 ms 2392 KB Output isn't correct
7 Incorrect 77 ms 15192 KB Output isn't correct
8 Correct 1 ms 2392 KB Output is 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 Incorrect 1 ms 2652 KB Output isn't 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 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 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 2 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 5 ms 6636 KB Output is correct
34 Correct 5 ms 6744 KB Output is correct
35 Correct 24 ms 7004 KB Output is correct
36 Correct 6 ms 6744 KB Output is correct
37 Correct 6 ms 7260 KB Output is correct
38 Correct 33 ms 7516 KB Output is correct
39 Correct 7 ms 9308 KB Output is correct
40 Correct 7 ms 9564 KB Output is correct
41 Correct 38 ms 10076 KB Output is correct
42 Correct 8 ms 9564 KB Output is correct
43 Correct 9 ms 10200 KB Output is correct
44 Correct 67 ms 10700 KB Output is correct
45 Correct 11 ms 9856 KB Output is correct
46 Correct 9 ms 10372 KB Output is correct
47 Correct 64 ms 11096 KB Output is correct
48 Correct 11 ms 10376 KB Output is correct
49 Correct 15 ms 10892 KB Output is correct
50 Correct 89 ms 11472 KB Output is correct
51 Correct 13 ms 10636 KB Output is correct
52 Correct 19 ms 11100 KB Output is correct
53 Correct 98 ms 11868 KB Output is correct
54 Correct 15 ms 12892 KB Output is correct
55 Correct 15 ms 13656 KB Output is correct
56 Correct 127 ms 14264 KB Output is correct
57 Correct 17 ms 13576 KB Output is correct
58 Correct 15 ms 14064 KB Output is correct
59 Correct 147 ms 14708 KB Output is correct
60 Correct 17 ms 13612 KB Output is correct
61 Correct 18 ms 14172 KB Output is correct
62 Correct 151 ms 15096 KB Output is correct
63 Correct 102 ms 15100 KB Output is correct
64 Correct 225 ms 15100 KB Output is correct
65 Correct 136 ms 14936 KB Output is correct
66 Correct 125 ms 14916 KB Output is correct
67 Incorrect 91 ms 15104 KB Output isn't correct
68 Correct 63 ms 15140 KB Output is correct
69 Correct 47 ms 14984 KB Output is correct
70 Correct 45 ms 15128 KB Output is correct
71 Correct 36 ms 14932 KB Output is correct
72 Incorrect 29 ms 14936 KB Output isn't correct
73 Incorrect 40 ms 15192 KB Output isn't correct
74 Correct 55 ms 15392 KB Output is correct
75 Correct 56 ms 15364 KB Output is correct
76 Correct 49 ms 15196 KB Output is correct
77 Correct 50 ms 15196 KB Output is correct
78 Incorrect 59 ms 15336 KB Output isn't correct
79 Correct 53 ms 15196 KB Output is correct
80 Correct 48 ms 15212 KB Output is correct
81 Correct 53 ms 15292 KB Output is correct
82 Correct 48 ms 15196 KB Output is correct
83 Correct 58 ms 15196 KB Output is correct
84 Correct 81 ms 15296 KB Output is correct
85 Correct 61 ms 15196 KB Output is correct
86 Correct 63 ms 15196 KB Output is correct
87 Correct 68 ms 15192 KB Output is correct
88 Correct 69 ms 15244 KB Output is correct
89 Correct 94 ms 15196 KB Output is correct
90 Correct 83 ms 15464 KB Output is correct
91 Correct 74 ms 15244 KB Output is correct
92 Correct 65 ms 15248 KB Output is correct