oj.uz

Submission #583973

# Submission time Handle Problem Language Result Execution time Memory
583973 2022-06-26T15:18:47 Z Omar_Elgedawy Mecho (IOI09_mecho) C++14
6 / 100
 306 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],vis[N][N],n,s,dp[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});
      }
    }
  }
}
void bfs2(int i,int j){
  int t=0;
  q.push({i,j,t});
  dp[i][j]=0;
  while(q.size()){
    i=q.front().i;
    j=q.front().j;
    t=q.front().t;
    q.pop();
    if(grid[i][j]=='D')continue;
    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')&&
         dp[x][y]>t+1&&block[x][y]>=(t+1)/s){
        q.push({x,y,t+1});
        dp[x][y]=t+1;
      }
    }
  }
}
bool bfs3(int i,int j,int st){
  queue<cell>cu;
  cu.push({i,j,st});
  memset(vis,0,sizeof vis);
  vis[i][j]=1;
  int t;
  while(cu.size()){
    i=cu.front().i;
    j=cu.front().j;
    t=cu.front().t;
    cu.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]){
        cu.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;
      dp[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;
    }
  }
  memset(vis,0,sizeof vis);
  bfs();
  // for(int i=0;i<n;i++){
  //   for(int j=0;j<n;j++){
  //     cout<<block[i][j]<<' ';
  //   }cout<<el;
  // }
  bfs2(xst,yst);
  int l=0,r=n*n+1;
  int mx=0;
  while(l<=r){
    int m=(l+r)/2;
    // cout<<l<<' '<<m<<' '<<r<<el;
    int x=bfs3(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:93:15: warning: variable 'xed' set but not used [-Wunused-but-set-variable]
   93 |   int xst,yst,xed,yed;
      |               ^~~
mecho.cpp:93:19: warning: variable 'yed' set but not used [-Wunused-but-set-variable]
   93 |   int xst,yst,xed,yed;
      |                   ^~~
mecho.cpp:125:15: warning: 'yst' may be used uninitialized in this function [-Wmaybe-uninitialized]
  125 |     int x=bfs3(xst,yst,m);
      |           ~~~~^~~~~~~~~~~
mecho.cpp:125:15: warning: 'xst' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1
6.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 2 ms 2772 KB Output is correct
3 Incorrect 2 ms 2804 KB Output isn't correct
4 Incorrect 2 ms 2772 KB Output isn't correct
5 Incorrect 2 ms 2784 KB Output isn't correct
6 Correct 2 ms 2900 KB Output is correct
7 Runtime error 187 ms 65536 KB Execution killed with signal 9
8 Incorrect 3 ms 2868 KB Output isn't correct
9 Correct 2 ms 2900 KB Output is correct
10 Incorrect 2 ms 2900 KB Output isn't correct
11 Correct 2 ms 2900 KB Output is correct
12 Incorrect 2 ms 3156 KB Output isn't correct
13 Incorrect 17 ms 3764 KB Output isn't correct
14 Incorrect 214 ms 18064 KB Output isn't correct
15 Incorrect 2 ms 2900 KB Output isn't correct
16 Incorrect 2 ms 2900 KB Output isn't correct
17 Incorrect 2 ms 2900 KB Output isn't correct
18 Incorrect 3 ms 2900 KB Output isn't correct
19 Incorrect 3 ms 3028 KB Output isn't correct
20 Incorrect 2 ms 3000 KB Output isn't correct
21 Incorrect 2 ms 3028 KB Output isn't correct
22 Incorrect 3 ms 3028 KB Output isn't correct
23 Incorrect 3 ms 3156 KB Output isn't correct
24 Incorrect 2 ms 3156 KB Output isn't correct
25 Incorrect 3 ms 3156 KB Output isn't correct
26 Incorrect 3 ms 3156 KB Output isn't correct
27 Incorrect 3 ms 3284 KB Output isn't correct
28 Incorrect 3 ms 3312 KB Output isn't correct
29 Incorrect 3 ms 3284 KB Output isn't correct
30 Incorrect 3 ms 3252 KB Output isn't correct
31 Incorrect 3 ms 3284 KB Output isn't correct
32 Incorrect 5 ms 3284 KB Output isn't correct
33 Incorrect 8 ms 5444 KB Output isn't correct
34 Incorrect 9 ms 5332 KB Output isn't correct
35 Runtime error 176 ms 65536 KB Execution killed with signal 9
36 Incorrect 10 ms 5764 KB Output isn't correct
37 Incorrect 14 ms 5716 KB Output isn't correct
38 Runtime error 158 ms 65536 KB Execution killed with signal 9
39 Incorrect 11 ms 6100 KB Output isn't correct
40 Incorrect 13 ms 6168 KB Output isn't correct
41 Runtime error 160 ms 65536 KB Execution killed with signal 9
42 Incorrect 14 ms 6484 KB Output isn't correct
43 Incorrect 15 ms 6488 KB Output isn't correct
44 Runtime error 156 ms 65536 KB Execution killed with signal 9
45 Incorrect 15 ms 6868 KB Output isn't correct
46 Incorrect 18 ms 6844 KB Output isn't correct
47 Runtime error 159 ms 65536 KB Execution killed with signal 9
48 Incorrect 18 ms 7252 KB Output isn't correct
49 Incorrect 22 ms 7124 KB Output isn't correct
50 Runtime error 195 ms 65536 KB Execution killed with signal 9
51 Incorrect 20 ms 7500 KB Output isn't correct
52 Incorrect 22 ms 7508 KB Output isn't correct
53 Runtime error 168 ms 65536 KB Execution killed with signal 9
54 Incorrect 23 ms 7924 KB Output isn't correct
55 Incorrect 31 ms 7924 KB Output isn't correct
56 Runtime error 163 ms 65536 KB Execution killed with signal 9
57 Incorrect 27 ms 8276 KB Output isn't correct
58 Incorrect 30 ms 8180 KB Output isn't correct
59 Runtime error 161 ms 65536 KB Execution killed with signal 9
60 Incorrect 29 ms 8532 KB Output isn't correct
61 Incorrect 32 ms 8548 KB Output isn't correct
62 Runtime error 163 ms 65536 KB Execution killed with signal 9
63 Correct 126 ms 8580 KB Output is correct
64 Correct 263 ms 8556 KB Output is correct
65 Incorrect 205 ms 8636 KB Output isn't correct
66 Incorrect 147 ms 8652 KB Output isn't correct
67 Incorrect 139 ms 8632 KB Output isn't correct
68 Incorrect 69 ms 8796 KB Output isn't correct
69 Correct 71 ms 8672 KB Output is correct
70 Correct 56 ms 8660 KB Output is correct
71 Correct 69 ms 8680 KB Output is correct
72 Incorrect 58 ms 8660 KB Output isn't correct
73 Runtime error 279 ms 65536 KB Execution killed with signal 9
74 Runtime error 273 ms 65536 KB Execution killed with signal 9
75 Runtime error 277 ms 65536 KB Execution killed with signal 9
76 Runtime error 274 ms 65536 KB Execution killed with signal 9
77 Runtime error 306 ms 65536 KB Execution killed with signal 9
78 Runtime error 255 ms 65536 KB Execution killed with signal 9
79 Runtime error 240 ms 65536 KB Execution killed with signal 9
80 Runtime error 244 ms 65536 KB Execution killed with signal 9
81 Runtime error 246 ms 65536 KB Execution killed with signal 9
82 Runtime error 241 ms 65536 KB Execution killed with signal 9
83 Runtime error 214 ms 65536 KB Execution killed with signal 9
84 Runtime error 215 ms 65536 KB Execution killed with signal 9
85 Runtime error 234 ms 65536 KB Execution killed with signal 9
86 Runtime error 219 ms 65536 KB Execution killed with signal 9
87 Runtime error 217 ms 65536 KB Execution killed with signal 9
88 Runtime error 198 ms 65536 KB Execution killed with signal 9
89 Runtime error 195 ms 65536 KB Execution killed with signal 9
90 Runtime error 196 ms 65536 KB Execution killed with signal 9
91 Runtime error 196 ms 65536 KB Execution killed with signal 9
92 Runtime error 197 ms 65536 KB Execution killed with signal 9