oj.uz

Submission #565640

# Submission time Handle Problem Language Result Execution time Memory
565640 2022-05-21T07:58:56 Z Quan2003 Mecho (IOI09_mecho) C++17
15 / 100
 263 ms 15564 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 (!bsearch(low)) cout <<-1;
        else cout <<low;
}

Subtask #1
15.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Correct 1 ms 340 KB Output is correct
4 Incorrect 0 ms 340 KB Output isn't correct
5 Incorrect 1 ms 340 KB Output isn't correct
6 Incorrect 1 ms 468 KB Output isn't correct
7 Incorrect 156 ms 15400 KB Output isn't correct
8 Incorrect 1 ms 468 KB Output isn't correct
9 Incorrect 1 ms 468 KB Output isn't correct
10 Incorrect 1 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 4 ms 1240 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 2 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 2 ms 1236 KB Output is correct
28 Incorrect 1 ms 1236 KB Output isn't correct
29 Correct 2 ms 1364 KB Output is correct
30 Incorrect 1 ms 1364 KB Output isn't correct
31 Correct 2 ms 1364 KB Output is correct
32 Incorrect 2 ms 1364 KB Output isn't correct
33 Correct 17 ms 6472 KB Output is correct
34 Incorrect 16 ms 6356 KB Output isn't correct
35 Incorrect 21 ms 6356 KB Output isn't correct
36 Correct 20 ms 7416 KB Output is correct
37 Incorrect 21 ms 7472 KB Output isn't correct
38 Incorrect 23 ms 7508 KB Output isn't correct
39 Correct 27 ms 8540 KB Output is correct
40 Incorrect 24 ms 8524 KB Output isn't correct
41 Incorrect 28 ms 8496 KB Output isn't correct
42 Correct 37 ms 9556 KB Output is correct
43 Incorrect 32 ms 9588 KB Output isn't correct
44 Incorrect 36 ms 9656 KB Output isn't correct
45 Correct 37 ms 10500 KB Output is correct
46 Incorrect 34 ms 10612 KB Output isn't correct
47 Incorrect 49 ms 10700 KB Output isn't correct
48 Correct 44 ms 11428 KB Output is correct
49 Incorrect 41 ms 11468 KB Output isn't correct
50 Incorrect 47 ms 11596 KB Output isn't correct
51 Correct 52 ms 12356 KB Output is correct
52 Incorrect 53 ms 12452 KB Output isn't correct
53 Incorrect 62 ms 12468 KB Output isn't correct
54 Correct 65 ms 13328 KB Output is correct
55 Incorrect 60 ms 13348 KB Output isn't correct
56 Incorrect 77 ms 13396 KB Output isn't correct
57 Correct 66 ms 14284 KB Output is correct
58 Incorrect 67 ms 14248 KB Output isn't correct
59 Incorrect 80 ms 14320 KB Output isn't correct
60 Correct 86 ms 15168 KB Output is correct
61 Incorrect 84 ms 15164 KB Output isn't correct
62 Incorrect 106 ms 15152 KB Output isn't correct
63 Incorrect 230 ms 15188 KB Output isn't correct
64 Incorrect 207 ms 15260 KB Output isn't correct
65 Incorrect 263 ms 15184 KB Output isn't correct
66 Incorrect 206 ms 15260 KB Output isn't correct
67 Incorrect 259 ms 15260 KB Output isn't correct
68 Incorrect 93 ms 15196 KB Output isn't correct
69 Incorrect 96 ms 15180 KB Output isn't correct
70 Incorrect 112 ms 15288 KB Output isn't correct
71 Incorrect 101 ms 15288 KB Output isn't correct
72 Incorrect 108 ms 15288 KB Output isn't correct
73 Incorrect 128 ms 15560 KB Output isn't correct
74 Incorrect 91 ms 15560 KB Output isn't correct
75 Incorrect 137 ms 15540 KB Output isn't correct
76 Incorrect 121 ms 15552 KB Output isn't correct
77 Incorrect 129 ms 15516 KB Output isn't correct
78 Incorrect 162 ms 15444 KB Output isn't correct
79 Incorrect 83 ms 15448 KB Output isn't correct
80 Incorrect 106 ms 15540 KB Output isn't correct
81 Incorrect 121 ms 15564 KB Output isn't correct
82 Incorrect 111 ms 15516 KB Output isn't correct
83 Incorrect 147 ms 15352 KB Output isn't correct
84 Incorrect 87 ms 15564 KB Output isn't correct
85 Incorrect 120 ms 15444 KB Output isn't correct
86 Incorrect 134 ms 15496 KB Output isn't correct
87 Incorrect 134 ms 15436 KB Output isn't correct
88 Incorrect 138 ms 15384 KB Output isn't correct
89 Incorrect 81 ms 15360 KB Output isn't correct
90 Incorrect 148 ms 15480 KB Output isn't correct
91 Incorrect 126 ms 15376 KB Output isn't correct
92 Incorrect 129 ms 15336 KB Output isn't correct