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Submission #583980

# Submission time Handle Problem Language Result Execution time Memory
583980 2022-06-26T15:27:09 Z Omar_Elgedawy Mecho (IOI09_mecho) C++14
41 / 100
 333 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();
    vis[i][j]=1;
    block[i][j]=min(t,block[i][j]);
    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;
  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:72:15: warning: variable 'xed' set but not used [-Wunused-but-set-variable]
   72 |   int xst,yst,xed,yed;
      |               ^~~
mecho.cpp:72:19: warning: variable 'yed' set but not used [-Wunused-but-set-variable]
   72 |   int xst,yst,xed,yed;
      |                   ^~~
mecho.cpp:104:15: warning: 'yst' may be used uninitialized in this function [-Wmaybe-uninitialized]
  104 |     int x=bfs2(xst,yst,m);
      |           ~~~~^~~~~~~~~~~
mecho.cpp:104:15: 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 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 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 Runtime error 200 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 14 ms 1108 KB Output isn't correct
14 Correct 209 ms 15268 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 0 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 0 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 5 ms 1876 KB Output is correct
34 Correct 5 ms 1876 KB Output is correct
35 Runtime error 169 ms 65536 KB Execution killed with signal 9
36 Correct 6 ms 2132 KB Output is correct
37 Correct 6 ms 2132 KB Output is correct
38 Runtime error 170 ms 65536 KB Execution killed with signal 9
39 Correct 8 ms 2388 KB Output is correct
40 Correct 9 ms 2448 KB Output is correct
41 Runtime error 169 ms 65536 KB Execution killed with signal 9
42 Correct 9 ms 2644 KB Output is correct
43 Correct 10 ms 2644 KB Output is correct
44 Runtime error 165 ms 65536 KB Execution killed with signal 9
45 Correct 14 ms 2876 KB Output is correct
46 Correct 12 ms 2860 KB Output is correct
47 Runtime error 172 ms 65536 KB Execution killed with signal 9
48 Correct 13 ms 3156 KB Output is correct
49 Correct 13 ms 3128 KB Output is correct
50 Runtime error 169 ms 65536 KB Execution killed with signal 9
51 Correct 17 ms 3284 KB Output is correct
52 Correct 19 ms 3292 KB Output is correct
53 Runtime error 164 ms 65536 KB Execution killed with signal 9
54 Correct 19 ms 3560 KB Output is correct
55 Correct 22 ms 3632 KB Output is correct
56 Runtime error 177 ms 65536 KB Execution killed with signal 9
57 Correct 20 ms 3756 KB Output is correct
58 Correct 27 ms 3820 KB Output is correct
59 Runtime error 188 ms 65536 KB Execution killed with signal 9
60 Correct 24 ms 4076 KB Output is correct
61 Correct 24 ms 4052 KB Output is correct
62 Runtime error 169 ms 65536 KB Execution killed with signal 9
63 Correct 113 ms 4080 KB Output is correct
64 Correct 220 ms 4076 KB Output is correct
65 Correct 152 ms 4044 KB Output is correct
66 Correct 125 ms 4184 KB Output is correct
67 Correct 125 ms 4076 KB Output is correct
68 Correct 58 ms 4052 KB Output is correct
69 Correct 54 ms 4108 KB Output is correct
70 Correct 43 ms 4120 KB Output is correct
71 Correct 47 ms 4100 KB Output is correct
72 Incorrect 45 ms 4132 KB Output isn't correct
73 Runtime error 311 ms 65536 KB Execution killed with signal 9
74 Runtime error 333 ms 65536 KB Execution killed with signal 9
75 Runtime error 291 ms 65536 KB Execution killed with signal 9
76 Runtime error 307 ms 65536 KB Execution killed with signal 9
77 Runtime error 285 ms 65536 KB Execution killed with signal 9
78 Runtime error 282 ms 65536 KB Execution killed with signal 9
79 Runtime error 250 ms 65536 KB Execution killed with signal 9
80 Runtime error 262 ms 65536 KB Execution killed with signal 9
81 Runtime error 263 ms 65536 KB Execution killed with signal 9
82 Runtime error 253 ms 65536 KB Execution killed with signal 9
83 Runtime error 247 ms 65536 KB Execution killed with signal 9
84 Runtime error 224 ms 65536 KB Execution killed with signal 9
85 Runtime error 231 ms 65536 KB Execution killed with signal 9
86 Runtime error 289 ms 65536 KB Execution killed with signal 9
87 Runtime error 223 ms 65536 KB Execution killed with signal 9
88 Runtime error 214 ms 65536 KB Execution killed with signal 9
89 Runtime error 222 ms 65536 KB Execution killed with signal 9
90 Runtime error 208 ms 65536 KB Execution killed with signal 9
91 Runtime error 205 ms 65536 KB Execution killed with signal 9
92 Runtime error 214 ms 65536 KB Execution killed with signal 9