oj.uz

Submission #565656

# Submission time Handle Problem Language Result Execution time Memory
565656 2022-05-21T08:17:29 Z Quan2003 Mecho (IOI09_mecho) C++17
24 / 100
 289 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]+1)/s;
            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=1e7;
      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
24.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Incorrect 0 ms 340 KB Output isn't correct
3 Incorrect 0 ms 340 KB Output isn't correct
4 Incorrect 1 ms 392 KB Output isn't correct
5 Correct 1 ms 340 KB Output is correct
6 Incorrect 0 ms 468 KB Output isn't correct
7 Correct 146 ms 15376 KB Output is correct
8 Correct 1 ms 468 KB Output is 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 Incorrect 1 ms 980 KB Output isn't correct
14 Correct 1 ms 1236 KB Output is correct
15 Incorrect 1 ms 596 KB Output isn't correct
16 Correct 1 ms 596 KB Output is correct
17 Incorrect 1 ms 596 KB Output isn't correct
18 Correct 1 ms 596 KB Output is correct
19 Incorrect 1 ms 724 KB Output isn't correct
20 Correct 1 ms 724 KB Output is correct
21 Incorrect 1 ms 852 KB Output isn't correct
22 Correct 1 ms 852 KB Output is correct
23 Incorrect 1 ms 980 KB Output isn't correct
24 Correct 1 ms 980 KB Output is correct
25 Incorrect 1 ms 1236 KB Output isn't correct
26 Correct 1 ms 1236 KB Output is correct
27 Incorrect 1 ms 1236 KB Output isn't correct
28 Correct 1 ms 1236 KB Output is correct
29 Incorrect 1 ms 1364 KB Output isn't correct
30 Correct 1 ms 1364 KB Output is correct
31 Incorrect 2 ms 1364 KB Output isn't correct
32 Correct 2 ms 1432 KB Output is correct
33 Incorrect 14 ms 6356 KB Output isn't correct
34 Correct 14 ms 6412 KB Output is correct
35 Correct 31 ms 6356 KB Output is correct
36 Incorrect 17 ms 7384 KB Output isn't correct
37 Correct 17 ms 7508 KB Output is correct
38 Correct 40 ms 7428 KB Output is correct
39 Incorrect 21 ms 8516 KB Output isn't correct
40 Correct 22 ms 8492 KB Output is correct
41 Correct 51 ms 8572 KB Output is correct
42 Incorrect 31 ms 9668 KB Output isn't correct
43 Correct 29 ms 9668 KB Output is correct
44 Correct 64 ms 9608 KB Output is correct
45 Incorrect 36 ms 10592 KB Output isn't correct
46 Correct 34 ms 10516 KB Output is correct
47 Correct 79 ms 10508 KB Output is correct
48 Incorrect 43 ms 11416 KB Output isn't correct
49 Correct 39 ms 11468 KB Output is correct
50 Correct 102 ms 11524 KB Output is correct
51 Incorrect 47 ms 12364 KB Output isn't correct
52 Correct 53 ms 12376 KB Output is correct
53 Correct 116 ms 12416 KB Output is correct
54 Incorrect 55 ms 13380 KB Output isn't correct
55 Correct 57 ms 13376 KB Output is correct
56 Correct 151 ms 13392 KB Output is correct
57 Incorrect 67 ms 14284 KB Output isn't correct
58 Correct 68 ms 14212 KB Output is correct
59 Correct 170 ms 14312 KB Output is correct
60 Incorrect 76 ms 15192 KB Output isn't correct
61 Correct 77 ms 15248 KB Output is correct
62 Correct 199 ms 15264 KB Output is correct
63 Incorrect 161 ms 15252 KB Output isn't correct
64 Incorrect 289 ms 15268 KB Output isn't correct
65 Correct 232 ms 15160 KB Output is correct
66 Correct 203 ms 15260 KB Output is correct
67 Correct 189 ms 15348 KB Output is correct
68 Correct 112 ms 15288 KB Output is correct
69 Incorrect 107 ms 15400 KB Output isn't correct
70 Correct 106 ms 15256 KB Output is correct
71 Correct 102 ms 15292 KB Output is correct
72 Incorrect 129 ms 15284 KB Output isn't correct
73 Incorrect 129 ms 15468 KB Output isn't correct
74 Incorrect 117 ms 15488 KB Output isn't correct
75 Correct 125 ms 15456 KB Output is correct
76 Incorrect 121 ms 15552 KB Output isn't correct
77 Correct 124 ms 15560 KB Output is correct
78 Correct 140 ms 15440 KB Output is correct
79 Correct 109 ms 15400 KB Output is correct
80 Correct 115 ms 15436 KB Output is correct
81 Correct 125 ms 15412 KB Output is correct
82 Correct 122 ms 15440 KB Output is correct
83 Correct 137 ms 15424 KB Output is correct
84 Incorrect 129 ms 15412 KB Output isn't correct
85 Correct 146 ms 15452 KB Output is correct
86 Correct 147 ms 15436 KB Output is correct
87 Correct 135 ms 15476 KB Output is correct
88 Correct 143 ms 15400 KB Output is correct
89 Incorrect 158 ms 15504 KB Output isn't correct
90 Correct 145 ms 15360 KB Output is correct
91 Correct 145 ms 15476 KB Output is correct
92 Correct 142 ms 15416 KB Output is correct