oj.uz

Submission #583985

# Submission time Handle Problem Language Result Execution time Memory
583985 2022-06-26T15:37:13 Z Omar_Elgedawy Mecho (IOI09_mecho) C++14
84 / 100
 174 ms 5716 KB 
#include <bits/stdc++.h>
using namespace std;
#define cin(vec)        for(auto& i : vec) cin >> i
#define cout(vec)       for(auto& i : vec) cout << i << " "; cout << "\n";
#define fast            ios::sync_with_stdio(0);cin.tie(0);
#define loop(i,a,b)     for (int i = a; i < b; i++)
#define F               first
#define S               second
#define pb(n)           push_back(n)
#define pf(n)           push_front(n)
#define dci(d)          fixed<<setprecision(d)
#define sp              ' '
#define el              '\n'
#define all(v)          v.begin(),v.end()
// #define int             long long
int dx[8]= {0,0,1,-1,-1,1,1,-1};
int dy[8]= {-1,1,0,0,-1,1,-1,1};
int const N=8e2+5,M=1e2+5,Mod=1e9;
char grid[N][N];
int block[N][N],n,s;
bool vis[N][N];
int valid(int i,int j){
  return (i>=0&&j>=0&&i<n&&j<n);
}
struct cell{
  int i;
  int j;
  int t;
};
queue<cell>q;
void bfs(){
  while(q.size()){
    int i=q.front().i;
    int j=q.front().j;
    int t=q.front().t;
    q.pop();
    if(block[i][j]<=t){
      continue;
    }
    block[i][j]=t;
    for(int k=0;k<4;k++){
      int x=dx[k]+i;
      int y=dy[k]+j;
      if(valid(x,y)&&grid[x][y]=='G'&&!vis[x][y]){
        q.push({x,y,t+1});
      }
    }
  }
}
bool bfs2(int i,int j,int st){
  while(q.size())q.pop();
  q.push({i,j,0});
  vis[i][j]=1;
  int t;
  while(q.size()){
    i=q.front().i;
    j=q.front().j;
    t=q.front().t;
    q.pop();
    if(grid[i][j]=='D')return 1;
    for(int k=0;k<4;k++){
      int x=dx[k]+i;
      int y=dy[k]+j;
      if(valid(x,y)&&(grid[x][y]=='G'||grid[x][y]=='D')&&block[x][y]>st+(t+1)/s&&!vis[x][y]){
        q.push({x,y,t+1});
        vis[x][y]=1;
      }
    }
  }
  return 0;
}
void testcase(int h){
  cin>>n>>s;
  int xst,yst,xed,yed;
  for(int i=0;i<n;i++){
    for(int j=0;j<n;j++){
      block[i][j]=1e9;
    }
  }
  for(int i=0;i<n;i++){
    string s;cin>>s;
    for(int j=0;j<n;j++){
      grid[i][j]=s[j];
      if(s[j]=='T')
        block[i][j]=-1;
      if(s[j]=='H')
        q.push({i,j,0});
      if(s[j]=='M')xst=i,yst=j;
      if(s[j]=='D')xed=i,yed=j;
    }
  }
  bfs();
  // for(int i=0;i<n;i++){
  //   for(int j=0;j<n;j++){
  //     cout<<block[i][j]<<' ';
  //   }cout<<el;
  // }
  int l=0,r=n*n*n;
  int mx=-1;
  while(l<=r){
    int m=(l+r)/2;
    // cout<<l<<' '<<m<<' '<<r<<el;
    for(int i=0;i<n;i++)
      for(int j=0;j<n;j++)
        vis[i][j]=0;
    int x=bfs2(xst,yst,m);
    if(x){
      mx=m;
      l=m+1;
    }
    else{
      r=m-1;
    }
  }
  cout<<mx<<el;
}
int32_t main()
{
  // fast
  testcase(1);
  // int tc;cin>>tc;for(int i=1;i<=tc;i++)testcase(i);
  return 0;
}

Compilation message

mecho.cpp: In function 'void testcase(int)':
mecho.cpp:74:15: warning: variable 'xed' set but not used [-Wunused-but-set-variable]
   74 |   int xst,yst,xed,yed;
      |               ^~~
mecho.cpp:74:19: warning: variable 'yed' set but not used [-Wunused-but-set-variable]
   74 |   int xst,yst,xed,yed;
      |                   ^~~
mecho.cpp:106:15: warning: 'yst' may be used uninitialized in this function [-Wmaybe-uninitialized]
  106 |     int x=bfs2(xst,yst,m);
      |           ~~~~^~~~~~~~~~~
mecho.cpp:106:15: warning: 'xst' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 116 ms 4628 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 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 1 ms 468 KB Output isn't correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 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 1 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 1 ms 596 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 6 ms 2004 KB Output is correct
34 Correct 6 ms 1876 KB Output is correct
35 Correct 26 ms 1968 KB Output is correct
36 Correct 8 ms 2184 KB Output is correct
37 Correct 8 ms 2132 KB Output is correct
38 Correct 31 ms 2204 KB Output is correct
39 Correct 9 ms 2388 KB Output is correct
40 Correct 9 ms 2384 KB Output is correct
41 Correct 39 ms 2388 KB Output is correct
42 Correct 10 ms 2644 KB Output is correct
43 Correct 11 ms 2680 KB Output is correct
44 Correct 51 ms 2644 KB Output is correct
45 Correct 12 ms 2924 KB Output is correct
46 Correct 18 ms 2832 KB Output is correct
47 Correct 56 ms 2920 KB Output is correct
48 Correct 15 ms 3156 KB Output is correct
49 Correct 15 ms 3156 KB Output is correct
50 Correct 78 ms 3156 KB Output is correct
51 Correct 17 ms 3284 KB Output is correct
52 Correct 18 ms 3372 KB Output is correct
53 Correct 87 ms 3416 KB Output is correct
54 Correct 20 ms 3540 KB Output is correct
55 Correct 20 ms 3580 KB Output is correct
56 Correct 119 ms 3608 KB Output is correct
57 Correct 24 ms 3780 KB Output is correct
58 Correct 23 ms 3788 KB Output is correct
59 Correct 110 ms 3780 KB Output is correct
60 Correct 36 ms 3960 KB Output is correct
61 Correct 25 ms 4056 KB Output is correct
62 Correct 147 ms 4112 KB Output is correct
63 Correct 118 ms 3972 KB Output is correct
64 Correct 174 ms 3972 KB Output is correct
65 Correct 161 ms 4088 KB Output is correct
66 Correct 171 ms 4096 KB Output is correct
67 Correct 115 ms 3976 KB Output is correct
68 Correct 60 ms 4048 KB Output is correct
69 Correct 64 ms 4052 KB Output is correct
70 Correct 55 ms 4044 KB Output is correct
71 Correct 50 ms 4172 KB Output is correct
72 Incorrect 62 ms 4108 KB Output isn't correct
73 Incorrect 98 ms 5708 KB Output isn't correct
74 Correct 89 ms 5716 KB Output is correct
75 Correct 95 ms 5592 KB Output is correct
76 Correct 104 ms 5708 KB Output is correct
77 Correct 98 ms 5668 KB Output is correct
78 Correct 96 ms 5444 KB Output is correct
79 Correct 81 ms 5552 KB Output is correct
80 Correct 88 ms 5496 KB Output is correct
81 Correct 110 ms 5552 KB Output is correct
82 Correct 89 ms 5456 KB Output is correct
83 Correct 111 ms 5196 KB Output is correct
84 Correct 95 ms 5300 KB Output is correct
85 Correct 96 ms 5196 KB Output is correct
86 Correct 122 ms 5196 KB Output is correct
87 Correct 103 ms 5176 KB Output is correct
88 Correct 105 ms 4884 KB Output is correct
89 Correct 110 ms 4836 KB Output is correct
90 Correct 114 ms 5036 KB Output is correct
91 Correct 129 ms 4932 KB Output is correct
92 Correct 109 ms 5036 KB Output is correct