oj.uz

Submission #1088864

# Submission time Handle Problem Language Result Execution time Memory
1088864 2024-09-15T10:58:52 Z StefanSebez Mecho (IOI09_mecho) C++14
49 / 100
 151 ms 7504 KB 
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define ll long long
#define ld long double
const int inf=1e9;
vector<string>a;
bool was[850][850];
int depth[850][850],dist[850][850],n,S;
bool Dobar(int x,int y){
	if(x<0||x>=n||y<0||y>=n||a[x][y]=='T'||was[x][y]) return false;
	return true;
}
int main(){
    scanf("%i%i",&n,&S);
    for(int i=0;i<n;i++){string s;cin>>s;a.pb(s);}
    int X0,Y0,X1,Y1;
    vector<pair<int,int> >H;
    for(int i=0;i<n;i++) for(int j=0;j<n;j++){if(a[i][j]=='M'){X0=i,Y0=j;}if(a[i][j]=='H')H.pb({i,j});if(a[i][j]=='D'){X1=i,Y1=j;}}
    queue<pair<int,int> >kju;
    for(auto i:H){kju.push(i);was[i.fi][i.se]=true;}
    while(kju.size()){
		int u=kju.front().fi,v=kju.front().se;kju.pop();
		if(Dobar(u-1,v)){depth[u-1][v]=depth[u][v]+1;was[u-1][v]=true;kju.push({u-1,v});}
		if(Dobar(u+1,v)){depth[u+1][v]=depth[u][v]+1;was[u+1][v]=true;kju.push({u+1,v});}
		if(Dobar(u,v-1)){depth[u][v-1]=depth[u][v]+1;was[u][v-1]=true;kju.push({u,v-1});}
		if(Dobar(u,v+1)){depth[u][v+1]=depth[u][v]+1;was[u][v+1]=true;kju.push({u,v+1});}
    }
    depth[X1][Y1]=inf;
    //for(int i=0;i<n;i++) {for(int j=0;j<n;j++) printf("%i ",depth[i][j]);printf("\n");}
    int l=0,r=5000,res=-1;
    while(l<=r){
		//printf("%i %i**\n",l,r);
		int mid=l+r>>1;
		for(int i=0;i<=n;i++) for(int j=0;j<=n;j++) {dist[i][j]=0;was[i][j]=false;}
		if(depth[X0][Y0]>mid) kju.push({X0,Y0});was[X0][Y0]=true;
		bool moze=false;
		for(int i=S,dst=mid;kju.size();i+=S,dst++){
			while(kju.size()){
				int u=kju.front().fi,v=kju.front().se;
				//printf("%i %i\n",u,v);
				if(u==X1 && v==Y1) moze=true;
				if(dist[u][v]>=i) break;
				kju.pop();
				if(Dobar(u-1,v)&&depth[u-1][v]>dst){dist[u-1][v]=dist[u][v]+1;was[u-1][v]=true;kju.push({u-1,v});}
				if(Dobar(u+1,v)&&depth[u+1][v]>dst){dist[u+1][v]=dist[u][v]+1;was[u+1][v]=true;kju.push({u+1,v});}
				if(Dobar(u,v-1)&&depth[u][v-1]>dst){dist[u][v-1]=dist[u][v]+1;was[u][v-1]=true;kju.push({u,v-1});}
				if(Dobar(u,v+1)&&depth[u][v+1]>dst){dist[u][v+1]=dist[u][v]+1;was[u][v+1]=true;kju.push({u,v+1});}
			}
		}
		if(moze) res=mid,l=mid+1;
		else r=mid-1;
    }
    printf("%i\n",res);
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:36:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   36 |   int mid=l+r>>1;
      |           ~^~
mecho.cpp:38:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   38 |   if(depth[X0][Y0]>mid) kju.push({X0,Y0});was[X0][Y0]=true;
      |   ^~
mecho.cpp:38:43: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   38 |   if(depth[X0][Y0]>mid) kju.push({X0,Y0});was[X0][Y0]=true;
      |                                           ^~~
mecho.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     scanf("%i%i",&n,&S);
      |     ~~~~~^~~~~~~~~~~~~~
mecho.cpp:38:18: warning: 'Y0' may be used uninitialized in this function [-Wmaybe-uninitialized]
   38 |   if(depth[X0][Y0]>mid) kju.push({X0,Y0});was[X0][Y0]=true;
      |      ~~~~~~~~~~~~^
mecho.cpp:38:18: warning: 'X0' may be used uninitialized in this function [-Wmaybe-uninitialized]
mecho.cpp:44:14: warning: 'Y1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   44 |     if(u==X1 && v==Y1) moze=true;
      |        ~~~~~~^~~~~~~~
mecho.cpp:44:5: warning: 'X1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   44 |     if(u==X1 && v==Y1) moze=true;
      |     ^~

Subtask #1
49.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 61 ms 7036 KB Output is correct
8 Incorrect 0 ms 348 KB Output isn't correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 0 ms 860 KB Output isn't correct
13 Correct 0 ms 604 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Incorrect 0 ms 604 KB Output isn't correct
16 Correct 1 ms 604 KB Output is correct
17 Incorrect 0 ms 604 KB Output isn't correct
18 Correct 0 ms 604 KB Output is correct
19 Incorrect 0 ms 604 KB Output isn't correct
20 Correct 1 ms 604 KB Output is correct
21 Incorrect 0 ms 604 KB Output isn't correct
22 Correct 0 ms 604 KB Output is correct
23 Incorrect 1 ms 604 KB Output isn't correct
24 Correct 1 ms 600 KB Output is correct
25 Incorrect 0 ms 860 KB Output isn't correct
26 Correct 1 ms 856 KB Output is correct
27 Incorrect 1 ms 856 KB Output isn't correct
28 Correct 1 ms 856 KB Output is correct
29 Incorrect 1 ms 860 KB Output isn't correct
30 Correct 1 ms 860 KB Output is correct
31 Incorrect 1 ms 856 KB Output isn't correct
32 Correct 1 ms 856 KB Output is correct
33 Incorrect 12 ms 3224 KB Output isn't correct
34 Incorrect 14 ms 3160 KB Output isn't correct
35 Correct 15 ms 3164 KB Output is correct
36 Incorrect 16 ms 3416 KB Output isn't correct
37 Incorrect 19 ms 3416 KB Output isn't correct
38 Correct 20 ms 3420 KB Output is correct
39 Incorrect 24 ms 4048 KB Output isn't correct
40 Incorrect 24 ms 3932 KB Output isn't correct
41 Correct 25 ms 3932 KB Output is correct
42 Incorrect 24 ms 4316 KB Output isn't correct
43 Incorrect 36 ms 4440 KB Output isn't correct
44 Correct 31 ms 4444 KB Output is correct
45 Incorrect 29 ms 4952 KB Output isn't correct
46 Incorrect 36 ms 4888 KB Output isn't correct
47 Correct 37 ms 4912 KB Output is correct
48 Incorrect 36 ms 5208 KB Output isn't correct
49 Incorrect 43 ms 5212 KB Output isn't correct
50 Correct 54 ms 5208 KB Output is correct
51 Incorrect 42 ms 5720 KB Output isn't correct
52 Incorrect 52 ms 5720 KB Output isn't correct
53 Correct 56 ms 5724 KB Output is correct
54 Incorrect 49 ms 5980 KB Output isn't correct
55 Incorrect 63 ms 5976 KB Output isn't correct
56 Correct 73 ms 5980 KB Output is correct
57 Incorrect 53 ms 6492 KB Output isn't correct
58 Incorrect 68 ms 6492 KB Output isn't correct
59 Correct 73 ms 6488 KB Output is correct
60 Incorrect 61 ms 7092 KB Output isn't correct
61 Incorrect 82 ms 7004 KB Output isn't correct
62 Correct 87 ms 7248 KB Output is correct
63 Correct 81 ms 7004 KB Output is correct
64 Correct 151 ms 7096 KB Output is correct
65 Correct 126 ms 7000 KB Output is correct
66 Incorrect 103 ms 7096 KB Output isn't correct
67 Correct 92 ms 6992 KB Output is correct
68 Correct 41 ms 7004 KB Output is correct
69 Correct 41 ms 7000 KB Output is correct
70 Correct 34 ms 7000 KB Output is correct
71 Correct 38 ms 7036 KB Output is correct
72 Correct 28 ms 6996 KB Output is correct
73 Correct 27 ms 7260 KB Output is correct
74 Correct 44 ms 7400 KB Output is correct
75 Correct 50 ms 7308 KB Output is correct
76 Correct 45 ms 7248 KB Output is correct
77 Correct 45 ms 7304 KB Output is correct
78 Correct 61 ms 7252 KB Output is correct
79 Correct 39 ms 7256 KB Output is correct
80 Correct 48 ms 7260 KB Output is correct
81 Correct 49 ms 7260 KB Output is correct
82 Correct 45 ms 7256 KB Output is correct
83 Correct 57 ms 7256 KB Output is correct
84 Correct 50 ms 7504 KB Output is correct
85 Correct 57 ms 7160 KB Output is correct
86 Correct 56 ms 7256 KB Output is correct
87 Correct 56 ms 7324 KB Output is correct
88 Correct 57 ms 7044 KB Output is correct
89 Correct 64 ms 7252 KB Output is correct
90 Correct 58 ms 7256 KB Output is correct
91 Correct 60 ms 7252 KB Output is correct
92 Correct 64 ms 7260 KB Output is correct