oj.uz

Submission #583169

# Submission time Handle Problem Language Result Execution time Memory
583169 2022-06-24T23:33:38 Z HeyYouNotYouYou Mecho (IOI09_mecho) C++14
58 / 100
 793 ms 16044 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;
  if(arr[srcx][srcy]<=mins) return false;
  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 = 1 , 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:86:7: warning: unused variable 'id' [-Wunused-variable]
   86 |   int id[n][n];
      |       ^~

Subtask #1
58.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 1 ms 212 KB Output isn't correct
5 Incorrect 1 ms 212 KB Output isn't correct
6 Incorrect 0 ms 340 KB Output isn't correct
7 Incorrect 482 ms 15476 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 0 ms 340 KB Output is correct
12 Incorrect 1 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 468 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 1 ms 596 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 596 KB Output is correct
31 Correct 2 ms 724 KB Output is correct
32 Correct 2 ms 724 KB Output is correct
33 Correct 38 ms 4352 KB Output is correct
34 Correct 41 ms 4308 KB Output is correct
35 Correct 66 ms 4400 KB Output is correct
36 Correct 51 ms 5204 KB Output is correct
37 Correct 49 ms 5204 KB Output is correct
38 Correct 85 ms 5304 KB Output is correct
39 Correct 64 ms 6276 KB Output is correct
40 Correct 65 ms 6272 KB Output is correct
41 Correct 149 ms 6248 KB Output is correct
42 Correct 94 ms 7256 KB Output is correct
43 Correct 79 ms 7320 KB Output is correct
44 Correct 153 ms 7276 KB Output is correct
45 Correct 115 ms 8464 KB Output is correct
46 Correct 108 ms 8464 KB Output is correct
47 Correct 177 ms 8476 KB Output is correct
48 Correct 115 ms 9676 KB Output is correct
49 Correct 132 ms 9644 KB Output is correct
50 Correct 259 ms 9696 KB Output is correct
51 Correct 144 ms 10972 KB Output is correct
52 Correct 147 ms 10956 KB Output is correct
53 Correct 274 ms 10980 KB Output is correct
54 Correct 161 ms 12236 KB Output is correct
55 Correct 179 ms 12340 KB Output is correct
56 Correct 399 ms 12352 KB Output is correct
57 Correct 183 ms 13888 KB Output is correct
58 Correct 197 ms 13668 KB Output is correct
59 Correct 513 ms 13800 KB Output is correct
60 Correct 212 ms 15308 KB Output is correct
61 Correct 253 ms 15400 KB Output is correct
62 Correct 563 ms 15320 KB Output is correct
63 Incorrect 537 ms 15336 KB Output isn't correct
64 Correct 628 ms 15336 KB Output is correct
65 Correct 580 ms 15340 KB Output is correct
66 Correct 567 ms 15332 KB Output is correct
67 Correct 560 ms 15328 KB Output is correct
68 Incorrect 604 ms 15384 KB Output isn't correct
69 Correct 561 ms 15388 KB Output is correct
70 Correct 549 ms 15384 KB Output is correct
71 Correct 605 ms 15512 KB Output is correct
72 Incorrect 566 ms 15348 KB Output isn't correct
73 Incorrect 554 ms 16020 KB Output isn't correct
74 Correct 683 ms 15948 KB Output is correct
75 Correct 717 ms 16044 KB Output is correct
76 Correct 636 ms 15932 KB Output is correct
77 Correct 793 ms 15936 KB Output is correct
78 Correct 595 ms 15856 KB Output is correct
79 Correct 569 ms 15852 KB Output is correct
80 Correct 599 ms 16008 KB Output is correct
81 Correct 563 ms 15880 KB Output is correct
82 Correct 615 ms 15852 KB Output is correct
83 Incorrect 564 ms 15780 KB Output isn't correct
84 Correct 589 ms 15892 KB Output is correct
85 Correct 553 ms 15820 KB Output is correct
86 Correct 543 ms 15848 KB Output is correct
87 Correct 572 ms 15984 KB Output is correct
88 Incorrect 583 ms 15708 KB Output isn't correct
89 Correct 527 ms 15660 KB Output is correct
90 Correct 537 ms 15720 KB Output is correct
91 Correct 477 ms 15632 KB Output is correct
92 Correct 505 ms 15656 KB Output is correct