oj.uz

Submission #1039365

# Submission time Handle Problem Language Result Execution time Memory
1039365 2024-07-30T19:06:53 Z Ludissey Mecho (IOI09_mecho) C++17
84 / 100
 403 ms 12932 KB 
#include <bits/stdc++.h>
#define int long long
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
 
using namespace std;
vector<vector<bool>> visited;
vector<vector<int>> dist;
 
vector<vector<char>> grid;
vector<vector<int>> beeT;
pair<int,int> home;
pair<int,int> bear;
int N,S;
bool f(int t){
    priority_queue<pair<int,pair<int,int>>> q;
    visited.clear();
    dist.clear();
    visited.resize(N,vector<bool>(N,false));
    dist.resize(N,vector<int>(N,1e9));
    dist[bear.first][bear.second]=t*S;
    q.push({-t*S,bear});
    while(!q.empty()){
        int x=q.top().second.first,y=q.top().second.second; q.pop();
        if((dist[x][y])/S>=beeT[x][y]&&grid[x][y]!='D') continue;
        if(visited[x][y]) continue;
        visited[x][y]=true;
        if(x-1>=0&&(grid[x-1][y]=='G'||grid[x-1][y]=='M'||grid[x-1][y]=='D')&&dist[x][y]+1<dist[x-1][y]){
            dist[x-1][y]=dist[x][y]+1;
            q.push({-dist[x-1][y], {x-1,y}});
        }
        if(x+1<N&&(grid[x+1][y]=='G'||grid[x+1][y]=='M'||grid[x+1][y]=='D')&&dist[x][y]+1<dist[x+1][y]){
            dist[x+1][y]=dist[x][y]+1;
            q.push({-dist[x+1][y], {x+1,y}});
        }
        if(y-1>=0&&(grid[x][y-1]=='G'||grid[x][y-1]=='M'||grid[x][y-1]=='D')&&dist[x][y]+1<dist[x][y-1]){
            dist[x][y-1]=dist[x][y]+1;
            q.push({-dist[x][y-1], {x,y-1}});
        }
        if(y+1<N&&(grid[x][y+1]=='G'||grid[x][y+1]=='M'||grid[x][y+1]=='D')&&dist[x][y]+1<dist[x][y+1]){
            dist[x][y+1]=dist[x][y]+1;
            q.push({-dist[x][y+1], {x,y+1}});
        }
    }
    return visited[home.first][home.second];
}
 
signed main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    cin >> N >> S;
    grid.resize(N,vector<char>(N));
    visited.resize(N,vector<bool>(N,false));
    for (int i = 0; i < N; i++) { for (int j = 0; j < N; j++) cin >> grid[i][j]; }
    for (int i = 0; i < N; i++) { for (int j = 0; j < N; j++){
        if(grid[i][j]=='M') bear={i,j};
        else if(grid[i][j]=='D') home={i,j};
    } 
    }
    beeT.resize(N,vector<int>(N,1e9));
    priority_queue<pair<int,pair<int,int>>> q;
    for (int i = 0; i < N; i++) { for (int j = 0; j < N; j++) if(grid[i][j]=='H') { q.push({0,{i,j}}); beeT[i][j]=0; }}
    while(!q.empty()){
        int x=q.top().second.first,y=q.top().second.second; q.pop();
        if(visited[x][y]) continue;
        visited[x][y]=true;
        if(x-1>=0&&(grid[x-1][y]=='G'||grid[x-1][y]=='M')&&beeT[x][y]+1<beeT[x-1][y]){
            beeT[x-1][y]=beeT[x][y]+1;
            q.push({-beeT[x-1][y], {x-1,y}});
        }
        if(x+1<N&&(grid[x+1][y]=='G'||grid[x+1][y]=='M')&&beeT[x][y]+1<beeT[x+1][y]){
            beeT[x+1][y]=beeT[x][y]+1;
            q.push({-beeT[x+1][y], {x+1,y}});
        }
        if(y-1>=0&&(grid[x][y-1]=='G'||grid[x][y-1]=='M')&&beeT[x][y]+1<beeT[x][y-1]){
            beeT[x][y-1]=beeT[x][y]+1;
            q.push({-beeT[x][y-1], {x,y-1}});
        }
        if(y+1<N&&(grid[x][y+1]=='G'||grid[x][y+1]=='M')&&beeT[x][y]+1<beeT[x][y+1]){
            beeT[x][y+1]=beeT[x][y]+1;
            q.push({-beeT[x][y+1], {x,y+1}});
        }
    }
    int l=0,r=1e9;
    while(l<r){
        int mid=(l+r+1)/2;
        if(f(mid)){
            l=mid;
        }else{
            r=mid-1;
        }
    }
    cout << l << "\n";
    return 0;
}

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 309 ms 12456 KB Output is correct
8 Incorrect 0 ms 344 KB Output isn't correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 472 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Incorrect 1 ms 364 KB Output isn't correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 12 ms 2704 KB Output is correct
34 Correct 16 ms 2692 KB Output is correct
35 Correct 64 ms 2700 KB Output is correct
36 Correct 14 ms 3364 KB Output is correct
37 Correct 15 ms 3372 KB Output is correct
38 Correct 87 ms 3372 KB Output is correct
39 Correct 18 ms 4216 KB Output is correct
40 Correct 19 ms 4228 KB Output is correct
41 Correct 111 ms 4252 KB Output is correct
42 Correct 24 ms 5040 KB Output is correct
43 Correct 25 ms 5076 KB Output is correct
44 Correct 148 ms 5032 KB Output is correct
45 Correct 29 ms 6004 KB Output is correct
46 Correct 31 ms 6008 KB Output is correct
47 Correct 176 ms 6000 KB Output is correct
48 Correct 35 ms 7148 KB Output is correct
49 Correct 37 ms 7028 KB Output is correct
50 Correct 215 ms 6992 KB Output is correct
51 Correct 45 ms 8124 KB Output is correct
52 Correct 43 ms 8240 KB Output is correct
53 Correct 268 ms 8216 KB Output is correct
54 Correct 51 ms 9420 KB Output is correct
55 Correct 58 ms 9316 KB Output is correct
56 Correct 313 ms 9448 KB Output is correct
57 Correct 53 ms 10684 KB Output is correct
58 Correct 55 ms 10672 KB Output is correct
59 Correct 359 ms 10736 KB Output is correct
60 Correct 71 ms 12104 KB Output is correct
61 Correct 65 ms 12104 KB Output is correct
62 Correct 383 ms 12128 KB Output is correct
63 Correct 221 ms 12020 KB Output is correct
64 Correct 403 ms 12048 KB Output is correct
65 Correct 369 ms 12108 KB Output is correct
66 Correct 279 ms 12004 KB Output is correct
67 Incorrect 267 ms 12052 KB Output isn't correct
68 Correct 135 ms 12120 KB Output is correct
69 Correct 137 ms 12172 KB Output is correct
70 Correct 128 ms 12164 KB Output is correct
71 Correct 109 ms 12180 KB Output is correct
72 Correct 109 ms 12268 KB Output is correct
73 Correct 150 ms 12876 KB Output is correct
74 Correct 229 ms 12848 KB Output is correct
75 Correct 249 ms 12832 KB Output is correct
76 Correct 241 ms 12860 KB Output is correct
77 Correct 239 ms 12932 KB Output is correct
78 Incorrect 264 ms 12800 KB Output isn't correct
79 Correct 224 ms 12836 KB Output is correct
80 Correct 244 ms 12756 KB Output is correct
81 Correct 253 ms 12756 KB Output is correct
82 Correct 232 ms 12784 KB Output is correct
83 Correct 270 ms 12596 KB Output is correct
84 Correct 270 ms 12680 KB Output is correct
85 Correct 261 ms 12652 KB Output is correct
86 Correct 299 ms 12648 KB Output is correct
87 Correct 270 ms 12600 KB Output is correct
88 Correct 284 ms 12596 KB Output is correct
89 Correct 302 ms 12568 KB Output is correct
90 Correct 309 ms 12508 KB Output is correct
91 Correct 312 ms 12540 KB Output is correct
92 Correct 308 ms 12676 KB Output is correct