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Submission #584000

# Submission time Handle Problem Language Result Execution time Memory
584000 2022-06-26T16:11:37 Z Omar_Elgedawy Mecho (IOI09_mecho) C++14
41 / 100
 454 ms 65536 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'||grid[x][y]=='M')&&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]=='H')block[i][j]=0,q.push({i,j,0});
      if(s[j]=='M')xst=i,yst=j;
      if(s[j]=='D')xed=i,yed=j;
    }
  }
  bfs();
  int l=0,r=1e9;
  int mx=-1;
  while(l<=r){
    int m=(l+r)/2;
    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(long long 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:97:15: warning: 'yst' may be used uninitialized in this function [-Wmaybe-uninitialized]
   97 |     int x=bfs2(xst,yst,m);
      |           ~~~~^~~~~~~~~~~
mecho.cpp:97:15: warning: 'xst' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1
41.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Runtime error 104 ms 65536 KB Execution killed with signal 9
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 1 ms 596 KB Output isn't correct
13 Incorrect 16 ms 3796 KB Output isn't correct
14 Correct 454 ms 63332 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 0 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 0 ms 468 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 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 724 KB Output is correct
30 Correct 1 ms 724 KB Output is correct
31 Correct 1 ms 724 KB Output is correct
32 Correct 1 ms 724 KB Output is correct
33 Correct 6 ms 3028 KB Output is correct
34 Correct 6 ms 3060 KB Output is correct
35 Runtime error 93 ms 65536 KB Execution killed with signal 9
36 Correct 7 ms 3412 KB Output is correct
37 Correct 7 ms 3412 KB Output is correct
38 Runtime error 90 ms 65536 KB Execution killed with signal 9
39 Correct 11 ms 3796 KB Output is correct
40 Correct 12 ms 3860 KB Output is correct
41 Runtime error 98 ms 65536 KB Execution killed with signal 9
42 Correct 12 ms 4180 KB Output is correct
43 Correct 13 ms 4180 KB Output is correct
44 Runtime error 93 ms 65536 KB Execution killed with signal 9
45 Correct 12 ms 4564 KB Output is correct
46 Correct 14 ms 4640 KB Output is correct
47 Runtime error 94 ms 65536 KB Execution killed with signal 9
48 Correct 18 ms 4948 KB Output is correct
49 Correct 16 ms 4952 KB Output is correct
50 Runtime error 97 ms 65536 KB Execution killed with signal 9
51 Correct 18 ms 5336 KB Output is correct
52 Correct 19 ms 5436 KB Output is correct
53 Runtime error 97 ms 65536 KB Execution killed with signal 9
54 Correct 23 ms 5788 KB Output is correct
55 Correct 23 ms 5792 KB Output is correct
56 Runtime error 117 ms 65536 KB Execution killed with signal 9
57 Correct 24 ms 6140 KB Output is correct
58 Correct 23 ms 6120 KB Output is correct
59 Runtime error 103 ms 65536 KB Execution killed with signal 9
60 Correct 26 ms 6504 KB Output is correct
61 Correct 26 ms 6476 KB Output is correct
62 Runtime error 99 ms 65536 KB Execution killed with signal 9
63 Correct 123 ms 6620 KB Output is correct
64 Correct 183 ms 6612 KB Output is correct
65 Correct 178 ms 6500 KB Output is correct
66 Correct 134 ms 6604 KB Output is correct
67 Correct 119 ms 6512 KB Output is correct
68 Correct 62 ms 6732 KB Output is correct
69 Correct 67 ms 6732 KB Output is correct
70 Correct 46 ms 6668 KB Output is correct
71 Correct 49 ms 6672 KB Output is correct
72 Incorrect 47 ms 6676 KB Output isn't correct
73 Runtime error 120 ms 65536 KB Execution killed with signal 9
74 Runtime error 120 ms 65536 KB Execution killed with signal 9
75 Runtime error 125 ms 65536 KB Execution killed with signal 9
76 Runtime error 138 ms 65536 KB Execution killed with signal 9
77 Runtime error 125 ms 65536 KB Execution killed with signal 9
78 Runtime error 116 ms 65536 KB Execution killed with signal 9
79 Runtime error 123 ms 65536 KB Execution killed with signal 9
80 Runtime error 126 ms 65536 KB Execution killed with signal 9
81 Runtime error 119 ms 65536 KB Execution killed with signal 9
82 Runtime error 119 ms 65536 KB Execution killed with signal 9
83 Runtime error 113 ms 65536 KB Execution killed with signal 9
84 Runtime error 115 ms 65536 KB Execution killed with signal 9
85 Runtime error 119 ms 65536 KB Execution killed with signal 9
86 Runtime error 132 ms 65536 KB Execution killed with signal 9
87 Runtime error 115 ms 65536 KB Execution killed with signal 9
88 Runtime error 109 ms 65536 KB Execution killed with signal 9
89 Runtime error 107 ms 65536 KB Execution killed with signal 9
90 Runtime error 113 ms 65536 KB Execution killed with signal 9
91 Runtime error 148 ms 65536 KB Execution killed with signal 9
92 Runtime error 110 ms 65536 KB Execution killed with signal 9