oj.uz

Submission #583151

# Submission time Handle Problem Language Result Execution time Memory
583151 2022-06-24T22:40:18 Z HeyYouNotYouYou Mecho (IOI09_mecho) C++14
73 / 100
 757 ms 16204 KB 
#include <bits/stdc++.h>
#define int long long
#define endl '\n'
using namespace std;
const int N = 801,INF=1e12;
int n , o, srcx, srcy, destx, desty, ar[N][N];
int dx[4]={0,-1,1,0};
int dy[4]={-1,0,0,1};
struct node{
  int x, y, dist;
};
bool valid1(int x, int y){
  if(x>=0 && x<n && y>=0 && y<n && (x!=srcx || y!=srcy) && (x!=destx || y!=desty)) return true;
  return false;
}
bool valid(int x, int y){
  if(x>=0 && x<n && y>=0 && y<n) return true;
  return false;
}
bool check(int mins)
{
  vector<pair<int,int>>hives;
  int arr[n][n];
  for(int i = 0 ; i < n ; i ++)
    for(int j = 0 ; j < n ; j ++)
      {
        arr[i][j]=ar[i][j];
        if(arr[i][j]==1) hives.push_back({i,j});
      }
  queue<pair<int,int>>q;
  int vis[n][n];
  memset(vis,0,sizeof vis);
  for(auto e : hives){
    q.push({e.first,e.second});
    vis[e.first][e.second]=1;
  }

  while(!q.empty())
  {
    int curx=q.front().first;
    int cury=q.front().second;
    q.pop();
    for(int i = 0 ; i < 4; i ++)
    {
      int gox = curx+dx[i], goy = cury+dy[i];
      if(valid(gox,goy) && !vis[gox][goy] && !arr[gox][goy]){
        vis[gox][goy]=1;
        arr[gox][goy]=arr[curx][cury]+1;
        q.push({gox,goy});
      }
    }
  }

  memset(vis,0,sizeof vis);
  q.push({srcx,srcy});
  vis[srcx][srcy]=1;
  arr[srcx][srcy]=1;
  while(!q.empty()){
    int curx=q.front().first;
    int cury=q.front().second;
    if(curx==destx&&cury==desty) return true;
    q.pop();
    for(int i = 0 ; i < 4; i ++)
    {
      int gox = curx+dx[i], goy = cury+dy[i];

      if(valid(gox,goy) && !vis[gox][goy] && arr[gox][goy]!=-1){
        if(mins+((arr[curx][cury])/o)+1 < arr[gox][goy]){

          vis[gox][goy]=1;
          arr[gox][goy]=arr[curx][cury]+1;
          q.push({gox,goy});
        }
      }
    }
  }


  return false;
}
int32_t main()
{
  //freopen("abc.in", "r", stdin);
  cin >> n >> o;
  int id[n][n];
  for(int i = 0 ; i < n ; i ++){
    for(int j = 0 ; j < n ; j ++){
      char x; cin >> x;
      ar[i][j] = (x=='H'?1:((x=='G'||x=='D'||x=='M')?0:-1));
      if(x=='M') srcx=i, srcy=j;
      if(x=='D') destx=i, desty=j;
    }
  }
  int l = 0 , r = n*n;
  int ans=-1;
  while(l <= r)
  {
    int mid = (l+r)/2;
    if(check(mid))
    {
      l = mid+1;
      ans=mid;
    }
    else
    {
      r = mid-1;
    }
  }
  cout<<ans<<endl;
}

Compilation message

mecho.cpp: In function 'int32_t main()':
mecho.cpp:85:7: warning: unused variable 'id' [-Wunused-variable]
   85 |   int id[n][n];
      |       ^~

Subtask #1
73.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB Output isn't correct
5 Correct 0 ms 212 KB Output is correct
6 Incorrect 0 ms 340 KB Output isn't correct
7 Incorrect 483 ms 15668 KB Output isn't correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Incorrect 2 ms 596 KB Output isn't correct
13 Incorrect 2 ms 468 KB Output isn't correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 420 KB Output is correct
22 Correct 1 ms 468 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 2 ms 540 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 2 ms 596 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 1 ms 596 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 3 ms 724 KB Output is correct
32 Correct 2 ms 724 KB Output is correct
33 Correct 34 ms 4300 KB Output is correct
34 Correct 42 ms 4360 KB Output is correct
35 Correct 64 ms 4412 KB Output is correct
36 Correct 46 ms 5288 KB Output is correct
37 Correct 46 ms 5296 KB Output is correct
38 Correct 76 ms 5300 KB Output is correct
39 Correct 60 ms 6228 KB Output is correct
40 Correct 77 ms 6268 KB Output is correct
41 Correct 121 ms 6280 KB Output is correct
42 Correct 87 ms 7248 KB Output is correct
43 Correct 78 ms 7252 KB Output is correct
44 Correct 158 ms 7340 KB Output is correct
45 Correct 113 ms 8460 KB Output is correct
46 Correct 99 ms 8460 KB Output is correct
47 Correct 192 ms 8492 KB Output is correct
48 Correct 126 ms 9684 KB Output is correct
49 Correct 123 ms 9804 KB Output is correct
50 Correct 194 ms 9668 KB Output is correct
51 Correct 148 ms 10964 KB Output is correct
52 Correct 167 ms 10964 KB Output is correct
53 Correct 255 ms 11144 KB Output is correct
54 Correct 187 ms 12444 KB Output is correct
55 Correct 168 ms 12392 KB Output is correct
56 Correct 392 ms 12356 KB Output is correct
57 Correct 206 ms 13772 KB Output is correct
58 Correct 195 ms 13780 KB Output is correct
59 Correct 458 ms 13804 KB Output is correct
60 Correct 230 ms 15312 KB Output is correct
61 Correct 226 ms 15308 KB Output is correct
62 Correct 489 ms 15332 KB Output is correct
63 Correct 529 ms 15332 KB Output is correct
64 Correct 667 ms 15340 KB Output is correct
65 Correct 578 ms 15332 KB Output is correct
66 Correct 521 ms 15444 KB Output is correct
67 Correct 519 ms 15376 KB Output is correct
68 Correct 567 ms 15392 KB Output is correct
69 Correct 544 ms 15392 KB Output is correct
70 Correct 537 ms 15392 KB Output is correct
71 Correct 587 ms 15384 KB Output is correct
72 Incorrect 536 ms 15384 KB Output isn't correct
73 Incorrect 562 ms 15940 KB Output isn't correct
74 Correct 613 ms 16204 KB Output is correct
75 Correct 757 ms 15952 KB Output is correct
76 Correct 643 ms 16028 KB Output is correct
77 Correct 547 ms 15928 KB Output is correct
78 Correct 518 ms 15848 KB Output is correct
79 Correct 499 ms 15920 KB Output is correct
80 Correct 522 ms 15936 KB Output is correct
81 Correct 537 ms 15864 KB Output is correct
82 Correct 493 ms 15856 KB Output is correct
83 Correct 481 ms 15740 KB Output is correct
84 Correct 508 ms 15884 KB Output is correct
85 Correct 554 ms 15776 KB Output is correct
86 Correct 506 ms 15784 KB Output is correct
87 Correct 505 ms 15872 KB Output is correct
88 Correct 496 ms 15656 KB Output is correct
89 Correct 465 ms 15652 KB Output is correct
90 Correct 472 ms 15784 KB Output is correct
91 Correct 459 ms 15660 KB Output is correct
92 Correct 499 ms 15644 KB Output is correct