Submission #59830

# Submission time Handle Problem Language Result Execution time Memory
59830 2018-07-23T07:40:46 Z Tenuun Mecho (IOI09_mecho) C++11
8 / 100
1000 ms 39236 KB
#include<bits/stdc++.h>

using namespace std;

int n, s, u, V, x, y, z;
int a[802][802], dx[4]={0, 0, 1, -1}, dy[4]={1, -1, 0, 0};
int bear[802][802];
int c[802][802];
vector<string> v;
vector<pair<int, int> >bee;
queue<pair<int, int>>q, b;

bool BFS(){
	queue<pair<pair<int, int>, int> >t;
	t.push({{x, y}, 0});
	bear[x][y]=0;
	while(!t.empty()){
		if(t.front().second>s) return false;
		x=t.front().first.first, y=t.front().first.second, z=t.front().second;
		t.pop();
		for(int i=0; i<4; i++){
			if(v[x+dx[i]][y+dy[i]]=='D') return true;
			if(v[x+dx[i]][y+dy[i]]=='G' && a[x+dx[i]][y+dy[i]]==-1 && bear[x+dx[i]][y+dy[i]]==-1){
				bear[x+dx[i]][y+dy[i]]=z+1;
				/*if(z+1>s) b.push({x+dx[i], y+dy[i]});
				else t.push({{x+dx[i], y+dy[i]}, z+1});*/
				b.push({x+dx[i], y+dy[i]});
				t.push({{x+dx[i], y+dy[i]}, z+1});
			}
		}
	}
	return false;
}

bool check(int m){
	for(int i=0; i<bee.size(); i++){
		x=bee[i].first, y=bee[i].second;
		a[x][y]=0;
		q.push(bee[i]);
	}
	b.push({u, V});
	c[u][V]=0;
	while(!q.empty()){
		x=q.front().first, y=q.front().second;
		z=a[x][y];
		if(z>m){
			while(!b.empty() && c[b.front().first][b.front().second]<z){
				x=b.front().first, y=b.front().second;
				b.pop();
				if(BFS()) return true;
			}
		}
		x=q.front().first, y=q.front().second;
		q.pop();
		for(int i=0; i<4; i++){
			if((v[x+dx[i]][y+dy[i]]=='G' || v[x+dx[i]][y+dy[i]]=='M') && a[x+dx[i]][y+dy[i]]==-1){
				a[x+dx[i]][y+dy[i]]=a[x][y]+1;
				q.push({x+dx[i], y+dy[i]});
			}
		}
	}
	return false;
}

void solve(){
	int l=0, r=2*n, m=(l+r+1)/2;
	while(l<r){
		memset(a, -1, sizeof a);
		memset(c, -1, sizeof c);
		memset(bear, -1, sizeof bear);
		while(!q.empty())q.pop();
		while(!b.empty())b.pop();
		if(check(m)) l=m;
		else r=m-1;
		m=(l+r+1)/2;
	}
	cout << l;
}


int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> n >> s;
	string tmp, k;
	for(int i=0; i<n+2; i++) tmp+='T';
	v.push_back(tmp);
	for(int i=1; i<=n; i++){
		cin >> k;
		k='T'+k+'T';
		for(int j=1; j<=n; j++){
			if(k[j]=='M'){
				u=i, V=j;
			}
			if(k[j]=='H'){
				bee.push_back({i, j});
			}
		}
		v.push_back(k);
	}
	v.push_back(tmp);
	solve();
	return 0;
}

Compilation message

mecho.cpp: In function 'bool check(int)':
mecho.cpp:36:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<bee.size(); i++){
               ~^~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 14 ms 7928 KB Output is correct
2 Incorrect 11 ms 7928 KB Output isn't correct
3 Correct 13 ms 8100 KB Output is correct
4 Incorrect 12 ms 8100 KB Output isn't correct
5 Correct 11 ms 8100 KB Output is correct
6 Incorrect 15 ms 8264 KB Output isn't correct
7 Incorrect 710 ms 9720 KB Output isn't correct
8 Incorrect 11 ms 9720 KB Output isn't correct
9 Incorrect 12 ms 9720 KB Output isn't correct
10 Incorrect 12 ms 9720 KB Output isn't correct
11 Incorrect 13 ms 9720 KB Output isn't correct
12 Incorrect 17 ms 9720 KB Output isn't correct
13 Correct 13 ms 9720 KB Output is correct
14 Incorrect 18 ms 9720 KB Output isn't correct
15 Incorrect 16 ms 9720 KB Output isn't correct
16 Incorrect 16 ms 9720 KB Output isn't correct
17 Incorrect 15 ms 9720 KB Output isn't correct
18 Incorrect 12 ms 9720 KB Output isn't correct
19 Incorrect 14 ms 9720 KB Output isn't correct
20 Incorrect 12 ms 9720 KB Output isn't correct
21 Incorrect 15 ms 9720 KB Output isn't correct
22 Incorrect 17 ms 9720 KB Output isn't correct
23 Incorrect 12 ms 9720 KB Output isn't correct
24 Incorrect 13 ms 9720 KB Output isn't correct
25 Incorrect 13 ms 9720 KB Output isn't correct
26 Incorrect 17 ms 9720 KB Output isn't correct
27 Incorrect 14 ms 9720 KB Output isn't correct
28 Incorrect 13 ms 9720 KB Output isn't correct
29 Incorrect 14 ms 9720 KB Output isn't correct
30 Incorrect 13 ms 9720 KB Output isn't correct
31 Incorrect 15 ms 9720 KB Output isn't correct
32 Incorrect 15 ms 9720 KB Output isn't correct
33 Incorrect 15 ms 9720 KB Output isn't correct
34 Incorrect 22 ms 9720 KB Output isn't correct
35 Incorrect 183 ms 9768 KB Output isn't correct
36 Incorrect 15 ms 9768 KB Output isn't correct
37 Incorrect 21 ms 9788 KB Output isn't correct
38 Incorrect 250 ms 10460 KB Output isn't correct
39 Incorrect 15 ms 10460 KB Output isn't correct
40 Incorrect 18 ms 10460 KB Output isn't correct
41 Incorrect 322 ms 11304 KB Output isn't correct
42 Incorrect 16 ms 11304 KB Output isn't correct
43 Incorrect 34 ms 11304 KB Output isn't correct
44 Incorrect 441 ms 12172 KB Output isn't correct
45 Incorrect 24 ms 12172 KB Output isn't correct
46 Incorrect 41 ms 12172 KB Output isn't correct
47 Incorrect 523 ms 13316 KB Output isn't correct
48 Incorrect 17 ms 13316 KB Output isn't correct
49 Incorrect 30 ms 13316 KB Output isn't correct
50 Incorrect 685 ms 14548 KB Output isn't correct
51 Incorrect 20 ms 14548 KB Output isn't correct
52 Incorrect 21 ms 14548 KB Output isn't correct
53 Incorrect 688 ms 15968 KB Output isn't correct
54 Incorrect 21 ms 15968 KB Output isn't correct
55 Incorrect 30 ms 15968 KB Output isn't correct
56 Incorrect 912 ms 17752 KB Output isn't correct
57 Incorrect 20 ms 17752 KB Output isn't correct
58 Incorrect 24 ms 17752 KB Output isn't correct
59 Execution timed out 1006 ms 19740 KB Time limit exceeded
60 Incorrect 19 ms 19740 KB Output isn't correct
61 Incorrect 21 ms 19740 KB Output isn't correct
62 Execution timed out 1074 ms 21900 KB Time limit exceeded
63 Incorrect 761 ms 21900 KB Output isn't correct
64 Execution timed out 1020 ms 22832 KB Time limit exceeded
65 Incorrect 987 ms 22832 KB Output isn't correct
66 Incorrect 681 ms 22832 KB Output isn't correct
67 Execution timed out 1006 ms 23208 KB Time limit exceeded
68 Incorrect 325 ms 24108 KB Output isn't correct
69 Incorrect 389 ms 24616 KB Output isn't correct
70 Incorrect 317 ms 25304 KB Output isn't correct
71 Incorrect 375 ms 25864 KB Output isn't correct
72 Correct 354 ms 26416 KB Output is correct
73 Correct 555 ms 27252 KB Output is correct
74 Correct 541 ms 28280 KB Output is correct
75 Incorrect 521 ms 28508 KB Output isn't correct
76 Incorrect 512 ms 29136 KB Output isn't correct
77 Incorrect 812 ms 29780 KB Output isn't correct
78 Incorrect 606 ms 30536 KB Output isn't correct
79 Correct 595 ms 32184 KB Output is correct
80 Incorrect 559 ms 32184 KB Output isn't correct
81 Incorrect 542 ms 32292 KB Output isn't correct
82 Incorrect 494 ms 33020 KB Output isn't correct
83 Incorrect 719 ms 33680 KB Output isn't correct
84 Correct 723 ms 35140 KB Output is correct
85 Incorrect 810 ms 35140 KB Output isn't correct
86 Incorrect 751 ms 35564 KB Output isn't correct
87 Incorrect 811 ms 36136 KB Output isn't correct
88 Incorrect 626 ms 36708 KB Output isn't correct
89 Correct 574 ms 38448 KB Output is correct
90 Incorrect 641 ms 38448 KB Output isn't correct
91 Incorrect 681 ms 38956 KB Output isn't correct
92 Incorrect 712 ms 39236 KB Output isn't correct