oj.uz

Submission #583987

# Submission time Handle Problem Language Result Execution time Memory
583987 2022-06-26T15:43:18 Z Omar_Elgedawy Mecho (IOI09_mecho) C++14
84 / 100
 167 ms 5720 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'||grid[x][y]=='M')){
        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 0 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 260 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 116 ms 4612 KB Output is correct
8 Correct 0 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 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 468 KB Output is correct
20 Correct 0 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 1952 KB Output is correct
34 Correct 7 ms 1916 KB Output is correct
35 Correct 24 ms 1992 KB Output is correct
36 Correct 7 ms 2132 KB Output is correct
37 Correct 7 ms 2132 KB Output is correct
38 Correct 32 ms 2132 KB Output is correct
39 Correct 9 ms 2388 KB Output is correct
40 Correct 9 ms 2416 KB Output is correct
41 Correct 39 ms 2448 KB Output is correct
42 Correct 11 ms 2612 KB Output is correct
43 Correct 11 ms 2644 KB Output is correct
44 Correct 49 ms 2572 KB Output is correct
45 Correct 14 ms 2900 KB Output is correct
46 Correct 13 ms 2900 KB Output is correct
47 Correct 60 ms 2808 KB Output is correct
48 Correct 15 ms 3084 KB Output is correct
49 Correct 15 ms 3156 KB Output is correct
50 Correct 72 ms 3176 KB Output is correct
51 Correct 18 ms 3320 KB Output is correct
52 Correct 17 ms 3276 KB Output is correct
53 Correct 87 ms 3404 KB Output is correct
54 Correct 20 ms 3556 KB Output is correct
55 Correct 20 ms 3576 KB Output is correct
56 Correct 118 ms 3640 KB Output is correct
57 Correct 29 ms 3788 KB Output is correct
58 Correct 27 ms 3780 KB Output is correct
59 Correct 117 ms 3872 KB Output is correct
60 Correct 26 ms 4052 KB Output is correct
61 Correct 27 ms 4024 KB Output is correct
62 Correct 142 ms 4120 KB Output is correct
63 Correct 147 ms 3992 KB Output is correct
64 Correct 167 ms 4048 KB Output is correct
65 Correct 157 ms 4096 KB Output is correct
66 Correct 146 ms 4072 KB Output is correct
67 Correct 117 ms 3964 KB Output is correct
68 Correct 61 ms 4056 KB Output is correct
69 Correct 60 ms 4064 KB Output is correct
70 Correct 69 ms 4172 KB Output is correct
71 Correct 50 ms 4092 KB Output is correct
72 Incorrect 47 ms 4052 KB Output isn't correct
73 Incorrect 63 ms 5720 KB Output isn't correct
74 Correct 89 ms 5712 KB Output is correct
75 Correct 97 ms 5596 KB Output is correct
76 Correct 107 ms 5600 KB Output is correct
77 Correct 125 ms 5680 KB Output is correct
78 Correct 98 ms 5552 KB Output is correct
79 Correct 80 ms 5528 KB Output is correct
80 Correct 94 ms 5500 KB Output is correct
81 Correct 109 ms 5444 KB Output is correct
82 Correct 105 ms 5492 KB Output is correct
83 Correct 106 ms 5292 KB Output is correct
84 Correct 97 ms 5180 KB Output is correct
85 Correct 99 ms 5296 KB Output is correct
86 Correct 117 ms 5204 KB Output is correct
87 Correct 105 ms 5184 KB Output is correct
88 Correct 111 ms 4884 KB Output is correct
89 Correct 112 ms 4936 KB Output is correct
90 Correct 124 ms 4944 KB Output is correct
91 Correct 130 ms 4832 KB Output is correct
92 Correct 110 ms 4920 KB Output is correct