oj.uz

Submission #565629

# Submission time Handle Problem Language Result Execution time Memory
565629 2022-05-21T07:49:39 Z Quan2003 Mecho (IOI09_mecho) C++17
17 / 100
 225 ms 15560 KB 
#include <bits/stdc++.h>
#include <iostream>
#include<queue>
#include<vector>
#include<utility>
using namespace std;
typedef long long ll;
const int sz=1005;
int n,s;
int d1[sz][sz];
int d0[sz][sz];
bool vis1[sz][sz];
bool vis0[sz][sz];
vector<pair<int,int>>hiv;
int px,py;
int dx,dy;
ll step[sz][sz];
int movex[4]={0,0,1,-1};
int movey[4]={-1,1,0,0};
char c[sz][sz];
void bfs(vector<pair<int,int>>&a,int d[sz][sz],bool visited[sz][sz]){
    queue<pair<int,int>>q;
    for (auto i:a){
        q.push(i);
        visited[i.first][i.second]=1;
    }
    while (!q.empty()){
        int x1=q.front().first;
        int y1=q.front().second;
        q.pop();
        for (int i=0;i<4;i++){
            int x2=x1+movex[i];
            int y2=y1+movey[i];
            if (x2<0 or x2>=n) continue;
            if (y2<0 or y2>=n) continue;
            if (c[x2][y2]!='.' or visited[x2][y2]) continue;
                visited[x2][y2]=1;
                d[x2][y2]=d[x1][y1]+1;
                q.push({x2,y2}); 
        }
    } 
}
bool bsearch(int k){
    for (int i=0;i<n;i++){
       for(int j=0;j<n;j++){
           vis1[i][j]=0;
           d1[i][j]=0;
           step[i][j]=LLONG_MAX;
       }
    }
    queue<pair<int,int>>q;
    q.push({px,py});
    step[px][py]=k;
    while (!q.empty()){
        int sx=q.front().first;
        int sy=q.front().second;
        q.pop();
        for (int i=0;i<4;i++){
            int tx=sx+movex[i];
            int ty=sy+movey[i];
            if (ty<0 or tx>=n) continue;
            if (ty<0 or ty>=n) continue;
            if (c[tx][ty]!='.' or vis1[tx][ty]) continue;
            d1[tx][ty]=d1[sx][sy]+1;
            int moves=k+d1[tx][ty]%s;
            if (moves==k) moves++;
            if (moves>=d0[tx][ty]) continue;
            step[tx][ty]=moves;
            vis1[tx][ty]=1;
            q.push({tx,ty});
        }
    } for (int i=0;i<4;i++){
         int tx=dx+movex[i];
         int ty=dy+movey[i];
         if (tx<0 or tx>=n or ty<0 or ty>=n) continue;
         if (step[tx][ty]<d0[tx][ty]) return 1;
    } return 0;
}
int main(){
    cin>>n>>s;
    for (int i=0;i<n;i++){
        for(int j=0;j<n;j++){
             char y; cin>>y;
             c[i][j]=y;
             if (c[i][j]=='G'){
                 c[i][j]='.';
             }
             if (c[i][j]=='D'){
                 dx=i;dy=j;
                 c[i][j]='.';
             }
             if (c[i][j]=='M'){
                 px=i;py=j;
             } if (c[i][j]=='H'){
                 hiv.push_back({i,j});
             }
        }
    } bfs(hiv,d0,vis0);
      int low=0;int high=1e6;
      while (high>low){
          int mid=low+(high-low+1)/2;
          if (bsearch(mid)) low=mid;
          else high=mid-1;
      } if (low==1e6) cout <<-1;
        else cout <<low;
}

Subtask #1
17.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Correct 0 ms 340 KB Output is correct
4 Incorrect 0 ms 340 KB Output isn't correct
5 Correct 1 ms 340 KB Output is correct
6 Incorrect 1 ms 468 KB Output isn't correct
7 Incorrect 175 ms 15440 KB Output isn't correct
8 Incorrect 0 ms 468 KB Output isn't correct
9 Incorrect 0 ms 468 KB Output isn't correct
10 Incorrect 0 ms 468 KB Output isn't correct
11 Correct 1 ms 468 KB Output is correct
12 Incorrect 1 ms 1236 KB Output isn't correct
13 Correct 1 ms 980 KB Output is correct
14 Incorrect 1 ms 1236 KB Output isn't correct
15 Correct 1 ms 596 KB Output is correct
16 Incorrect 1 ms 596 KB Output isn't correct
17 Correct 1 ms 596 KB Output is correct
18 Incorrect 1 ms 596 KB Output isn't correct
19 Correct 1 ms 724 KB Output is correct
20 Incorrect 1 ms 724 KB Output isn't correct
21 Correct 1 ms 852 KB Output is correct
22 Incorrect 1 ms 852 KB Output isn't correct
23 Correct 1 ms 980 KB Output is correct
24 Incorrect 1 ms 980 KB Output isn't correct
25 Correct 1 ms 1236 KB Output is correct
26 Incorrect 1 ms 1236 KB Output isn't correct
27 Correct 1 ms 1236 KB Output is correct
28 Incorrect 2 ms 1236 KB Output isn't correct
29 Correct 1 ms 1364 KB Output is correct
30 Incorrect 1 ms 1364 KB Output isn't correct
31 Correct 1 ms 1364 KB Output is correct
32 Incorrect 1 ms 1364 KB Output isn't correct
33 Correct 14 ms 6468 KB Output is correct
34 Incorrect 15 ms 6356 KB Output isn't correct
35 Incorrect 16 ms 6396 KB Output isn't correct
36 Correct 17 ms 7380 KB Output is correct
37 Incorrect 18 ms 7436 KB Output isn't correct
38 Incorrect 19 ms 7500 KB Output isn't correct
39 Correct 22 ms 8472 KB Output is correct
40 Incorrect 21 ms 8532 KB Output isn't correct
41 Incorrect 25 ms 8532 KB Output isn't correct
42 Correct 28 ms 9680 KB Output is correct
43 Incorrect 27 ms 9668 KB Output isn't correct
44 Incorrect 30 ms 9564 KB Output isn't correct
45 Correct 42 ms 10580 KB Output is correct
46 Incorrect 36 ms 10496 KB Output isn't correct
47 Incorrect 37 ms 10572 KB Output isn't correct
48 Correct 37 ms 11520 KB Output is correct
49 Incorrect 37 ms 11520 KB Output isn't correct
50 Incorrect 47 ms 11468 KB Output isn't correct
51 Correct 50 ms 12364 KB Output is correct
52 Incorrect 45 ms 12364 KB Output isn't correct
53 Incorrect 53 ms 12364 KB Output isn't correct
54 Correct 58 ms 13356 KB Output is correct
55 Incorrect 53 ms 13388 KB Output isn't correct
56 Incorrect 59 ms 13340 KB Output isn't correct
57 Correct 63 ms 14316 KB Output is correct
58 Incorrect 64 ms 14320 KB Output isn't correct
59 Incorrect 69 ms 14284 KB Output isn't correct
60 Correct 68 ms 15152 KB Output is correct
61 Incorrect 69 ms 15180 KB Output isn't correct
62 Incorrect 87 ms 15260 KB Output isn't correct
63 Incorrect 179 ms 15288 KB Output isn't correct
64 Incorrect 162 ms 15264 KB Output isn't correct
65 Incorrect 225 ms 15160 KB Output isn't correct
66 Incorrect 171 ms 15164 KB Output isn't correct
67 Incorrect 218 ms 15344 KB Output isn't correct
68 Correct 84 ms 15292 KB Output is correct
69 Incorrect 81 ms 15168 KB Output isn't correct
70 Incorrect 94 ms 15284 KB Output isn't correct
71 Incorrect 109 ms 15344 KB Output isn't correct
72 Incorrect 96 ms 15292 KB Output isn't correct
73 Incorrect 111 ms 15556 KB Output isn't correct
74 Incorrect 87 ms 15560 KB Output isn't correct
75 Incorrect 119 ms 15552 KB Output isn't correct
76 Incorrect 106 ms 15556 KB Output isn't correct
77 Incorrect 111 ms 15468 KB Output isn't correct
78 Incorrect 131 ms 15508 KB Output isn't correct
79 Incorrect 77 ms 15504 KB Output isn't correct
80 Incorrect 99 ms 15516 KB Output isn't correct
81 Incorrect 120 ms 15516 KB Output isn't correct
82 Incorrect 130 ms 15460 KB Output isn't correct
83 Incorrect 136 ms 15436 KB Output isn't correct
84 Incorrect 82 ms 15480 KB Output isn't correct
85 Incorrect 120 ms 15412 KB Output isn't correct
86 Incorrect 131 ms 15436 KB Output isn't correct
87 Incorrect 124 ms 15356 KB Output isn't correct
88 Incorrect 149 ms 15500 KB Output isn't correct
89 Incorrect 86 ms 15368 KB Output isn't correct
90 Incorrect 155 ms 15308 KB Output isn't correct
91 Incorrect 123 ms 15416 KB Output isn't correct
92 Incorrect 118 ms 15304 KB Output isn't correct