Submission #293929

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
293929	2020-09-08T13:48:34 Z	kshitij_sodani	Mecho (IOI09_mecho)	C++14	54 / 100	275 ms	8840 KB

mecho

#include <bits/stdc++.h>
using namespace std;
#define a first
#define b second
#define pb push_back

typedef long long llo;
#define endl '\n'



int n,s;
queue<pair<int,int>> ss;
int dist[801][801];
int it[801][801];
vector<int> x={1,-1,0,0};
vector<int> y={0,0,1,-1};
int dd[801][801];

pair<int,int> aa;
pair<int,int> bb;

bool check(int mid){
	queue<pair<int,int>> tt;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			dd[i][j]=-1;
		}
	}
	dd[aa.a][aa.b]=0;
	tt.push({aa.a,aa.b});
	while(tt.size()){
		pair<int,int> no=tt.front();
		tt.pop();
		//if(dd[no.a][no.b])
		for(int i=0;i<4;i++){
			int xx=no.a+x[i];
			int yy=no.b+y[i];
			if(xx<0 or xx>=n or yy<0 or yy>=n){
				continue;
			}
			if(it[xx][yy]==0){
				continue;
			}
			if(dd[xx][yy]==-1){
				if(dist[xx][yy]!=-1){
					if(dist[xx][yy]<=mid-1+(dd[no.a][no.b]+1+s-1)/s){
					
						continue;
					}
				}

				dd[xx][yy]=dd[no.a][no.b]+1;
				//cout<<xx<<":"<<yy<<":"<<dd[xx][yy]<<endl;
				tt.push({xx,yy});
			}
		}
	}
	/*for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			cout<<dd[i][j]<<",";
		}
		cout<<endl;
	}
	cout<<mid<<":"<<dd[bb.a][bb.b]<<endl;*/
	return dd[bb.a][bb.b]!=-1;

}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>n>>s;
	
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			dist[i][j]=-1;
			char s;
			cin>>s;
			it[i][j]=1;
			if(s=='T'){
				it[i][j]=0;
			}
			else if(s=='G'){
			}
			else if(s=='M'){
				aa={i,j};
			}
			else if(s=='D'){
				it[i][j]=0;
				bb={i,j};
			}
			else if(s=='H'){
				ss.push({i,j});
				dist[i][j]=0;
			}
		}
	}
	while(ss.size()){
		pair<int,int> no=ss.front();
		ss.pop();
		for(int i=0;i<4;i++){
			int xx=no.a+x[i];
			int yy=no.b+y[i];
			if(xx<0 or xx>=n or yy<0 or yy>=n){
				continue;
			}
			if(it[xx][yy]==0){
				continue;
			}
			if(dist[xx][yy]==-1){
				dist[xx][yy]=dist[no.a][no.b]+1;
				ss.push({xx,yy});
			}
		}
	}
	int low=0;
	int high=dist[aa.a][aa.b]-1;
	it[bb.a][bb.b]=1;
	if(check(low)==false){
		cout<<-1<<endl;
	}
	else{
		while(low<high-1){
			int mid=(low+high)/2;
			if(check(mid)){
				low=mid;
			}
			else{
				high=mid;
			}
		}
		int ans=low;
		if(check(high)){
			ans=max(ans,high);
		}
		cout<<ans<<endl;
	}




	return 0;
}

Subtask #1

54.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	384 KB	Output isn't correct
2	Incorrect	0 ms	384 KB	Output isn't correct
3	Incorrect	1 ms	384 KB	Output isn't correct
4	Incorrect	1 ms	384 KB	Output isn't correct
5	Correct	1 ms	512 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	128 ms	8568 KB	Output is correct
8	Incorrect	1 ms	512 KB	Output isn't correct
9	Correct	1 ms	512 KB	Output is correct
10	Correct	1 ms	512 KB	Output is correct
11	Correct	1 ms	512 KB	Output is correct
12	Correct	1 ms	896 KB	Output is correct
13	Correct	1 ms	768 KB	Output is correct
14	Correct	1 ms	916 KB	Output is correct
15	Incorrect	1 ms	512 KB	Output isn't correct
16	Correct	1 ms	512 KB	Output is correct
17	Incorrect	1 ms	640 KB	Output isn't correct
18	Correct	1 ms	640 KB	Output is correct
19	Incorrect	1 ms	640 KB	Output isn't correct
20	Correct	1 ms	640 KB	Output is correct
21	Incorrect	1 ms	768 KB	Output isn't correct
22	Correct	1 ms	768 KB	Output is correct
23	Incorrect	1 ms	768 KB	Output isn't correct
24	Correct	1 ms	768 KB	Output is correct
25	Incorrect	1 ms	948 KB	Output isn't correct
26	Correct	1 ms	896 KB	Output is correct
27	Incorrect	1 ms	1024 KB	Output isn't correct
28	Correct	1 ms	1024 KB	Output is correct
29	Incorrect	1 ms	1024 KB	Output isn't correct
30	Correct	1 ms	1024 KB	Output is correct
31	Incorrect	1 ms	1024 KB	Output isn't correct
32	Correct	1 ms	1024 KB	Output is correct
33	Incorrect	9 ms	3712 KB	Output isn't correct
34	Correct	11 ms	3712 KB	Output is correct
35	Correct	34 ms	3712 KB	Output is correct
36	Incorrect	12 ms	4224 KB	Output isn't correct
37	Correct	15 ms	4224 KB	Output is correct
38	Correct	47 ms	4324 KB	Output is correct
39	Incorrect	14 ms	4736 KB	Output isn't correct
40	Correct	17 ms	4736 KB	Output is correct
41	Correct	60 ms	4736 KB	Output is correct
42	Incorrect	20 ms	5248 KB	Output isn't correct
43	Correct	21 ms	5248 KB	Output is correct
44	Correct	71 ms	5248 KB	Output is correct
45	Incorrect	21 ms	5888 KB	Output isn't correct
46	Correct	24 ms	5880 KB	Output is correct
47	Correct	88 ms	5888 KB	Output is correct
48	Incorrect	25 ms	6400 KB	Output isn't correct
49	Correct	29 ms	6400 KB	Output is correct
50	Correct	107 ms	6392 KB	Output is correct
51	Incorrect	27 ms	6892 KB	Output isn't correct
52	Correct	34 ms	6912 KB	Output is correct
53	Correct	132 ms	6912 KB	Output is correct
54	Incorrect	33 ms	7416 KB	Output isn't correct
55	Correct	38 ms	7416 KB	Output is correct
56	Correct	155 ms	7544 KB	Output is correct
57	Incorrect	37 ms	7936 KB	Output isn't correct
58	Correct	46 ms	7936 KB	Output is correct
59	Correct	178 ms	8056 KB	Output is correct
60	Incorrect	41 ms	8440 KB	Output isn't correct
61	Correct	49 ms	8448 KB	Output is correct
62	Correct	206 ms	8448 KB	Output is correct
63	Correct	153 ms	8444 KB	Output is correct
64	Correct	275 ms	8440 KB	Output is correct
65	Correct	268 ms	8568 KB	Output is correct
66	Incorrect	198 ms	8440 KB	Output isn't correct
67	Correct	59 ms	8440 KB	Output is correct
68	Correct	88 ms	8568 KB	Output is correct
69	Correct	66 ms	8568 KB	Output is correct
70	Correct	67 ms	8568 KB	Output is correct
71	Correct	65 ms	8568 KB	Output is correct
72	Correct	63 ms	8568 KB	Output is correct
73	Correct	61 ms	8824 KB	Output is correct
74	Correct	127 ms	8840 KB	Output is correct
75	Correct	119 ms	8764 KB	Output is correct
76	Correct	116 ms	8840 KB	Output is correct
77	Correct	112 ms	8824 KB	Output is correct
78	Correct	64 ms	8696 KB	Output is correct
79	Correct	108 ms	8696 KB	Output is correct
80	Correct	105 ms	8696 KB	Output is correct
81	Correct	111 ms	8696 KB	Output is correct
82	Correct	98 ms	8732 KB	Output is correct
83	Correct	117 ms	8824 KB	Output is correct
84	Correct	133 ms	8824 KB	Output is correct
85	Correct	119 ms	8700 KB	Output is correct
86	Correct	125 ms	8776 KB	Output is correct
87	Correct	122 ms	8696 KB	Output is correct
88	Correct	123 ms	8700 KB	Output is correct
89	Correct	149 ms	8684 KB	Output is correct
90	Correct	137 ms	8728 KB	Output is correct
91	Correct	150 ms	8664 KB	Output is correct
92	Correct	135 ms	8724 KB	Output is correct