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Submission #742749

# Submission time Handle Problem Language Result Execution time Memory
742749 2023-05-16T20:29:48 Z CSQ31 Mecho (IOI09_mecho) C++17
100 / 100
 179 ms 7660 KB 
#pragma GCC optimize("Ofast") 
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
#define lb lower_bound
#define ub upper_bound
#define owo ios_base::sync_with_stdio(0);cin.tie(0);
#define INF (ll)(1e18)
#define debug(...) fprintf(stderr, __VA_ARGS__),fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false);\
debug("%s time : %.4fs\n", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))
typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> PII;
typedef pair<int,int> pii;
typedef vector<vector<int>> vii;
typedef vector<vector<ll>> VII;
ll gcd(ll a,ll b){if(!b)return a;else return gcd(b,a%b);}
int n,s,dx[4] = {0,0,1,-1},dy[4] = {1,-1,0,0};
int dist[1000][1000],bdist[1000][1000];
char grid[1000][1000];
pii st,ed;
bool check(int tim){
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			dist[i][j] = 1e9;
		}
	}
	queue<pii>q;
	if(tim < bdist[st.fi][st.se]){
		q.push(st);
		dist[st.fi][st.se] = 0;
	}
	while(!q.empty()){
		pii v = q.front();
		q.pop();
		int d = dist[v.fi][v.se];
		for(int i=0;i<4;i++){
			int x = v.fi+dx[i];
			int y = v.se+dy[i];
			if(x>=0 && x<n && y>=0 && y<n && dist[x][y] ==1e9 && grid[x][y] != 'T'){
				if((d+1)/s + tim < bdist[x][y]){ 
					dist[x][y] = dist[v.fi][v.se]+1;
					q.push({x,y});
				}
			}
		}
	}
	return dist[ed.fi][ed.se] != 1e9;
}
int main()
{
	owo
	cin>>n>>s;
	queue<pii>bee;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			cin>>grid[i][j];	
			bdist[i][j] = 1e9;
			if(grid[i][j] == 'M')st = {i,j};
			if(grid[i][j] == 'D')ed = {i,j};
			if(grid[i][j] == 'H'){
				bdist[i][j] = 0;
				bee.push({i,j});
			}
				
		}
	}
	while(!bee.empty()){
		pii v = bee.front();
		bee.pop();
		for(int i=0;i<4;i++){
			int x = v.fi+dx[i];
			int y = v.se+dy[i];
			if(x>=0 && x<n && y>=0 && y<n && bdist[x][y] == 1e9 && (grid[x][y] == 'G' || grid[x][y] == 'M')){
				bdist[x][y] = bdist[v.fi][v.se] +1;
				bee.push({x,y});
			}
		}
	}
	if(!check(0)){
		cout<<-1;
		return 0;
	}
	int l = 0,r = n*n;
	while(r>=l){
		int mid = (l+r)/2;
		if(check(mid))l = mid+1;
		else r = mid-1;
	}
	cout<<r<<'\n';
	
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 70 ms 7484 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 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 Correct 1 ms 852 KB Output is correct
13 Correct 1 ms 724 KB Output is correct
14 Correct 1 ms 852 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 724 KB Output is correct
24 Correct 1 ms 724 KB Output is correct
25 Correct 1 ms 852 KB Output is correct
26 Correct 1 ms 852 KB Output is correct
27 Correct 1 ms 852 KB Output is correct
28 Correct 1 ms 852 KB Output is correct
29 Correct 1 ms 852 KB Output is correct
30 Correct 1 ms 852 KB Output is correct
31 Correct 1 ms 980 KB Output is correct
32 Correct 1 ms 980 KB Output is correct
33 Correct 5 ms 3420 KB Output is correct
34 Correct 6 ms 3412 KB Output is correct
35 Correct 18 ms 3424 KB Output is correct
36 Correct 7 ms 3860 KB Output is correct
37 Correct 8 ms 3860 KB Output is correct
38 Correct 24 ms 3924 KB Output is correct
39 Correct 9 ms 4308 KB Output is correct
40 Correct 10 ms 4180 KB Output is correct
41 Correct 31 ms 4288 KB Output is correct
42 Correct 9 ms 4692 KB Output is correct
43 Correct 11 ms 4692 KB Output is correct
44 Correct 41 ms 4692 KB Output is correct
45 Correct 12 ms 5076 KB Output is correct
46 Correct 14 ms 5128 KB Output is correct
47 Correct 47 ms 5076 KB Output is correct
48 Correct 14 ms 5588 KB Output is correct
49 Correct 16 ms 5588 KB Output is correct
50 Correct 53 ms 5624 KB Output is correct
51 Correct 16 ms 5972 KB Output is correct
52 Correct 28 ms 6056 KB Output is correct
53 Correct 77 ms 6092 KB Output is correct
54 Correct 17 ms 6416 KB Output is correct
55 Correct 25 ms 6480 KB Output is correct
56 Correct 81 ms 6488 KB Output is correct
57 Correct 20 ms 6868 KB Output is correct
58 Correct 25 ms 6820 KB Output is correct
59 Correct 99 ms 6924 KB Output is correct
60 Correct 23 ms 7380 KB Output is correct
61 Correct 29 ms 7380 KB Output is correct
62 Correct 102 ms 7364 KB Output is correct
63 Correct 102 ms 7364 KB Output is correct
64 Correct 179 ms 7364 KB Output is correct
65 Correct 127 ms 7320 KB Output is correct
66 Correct 107 ms 7368 KB Output is correct
67 Correct 30 ms 7320 KB Output is correct
68 Correct 44 ms 7372 KB Output is correct
69 Correct 45 ms 7336 KB Output is correct
70 Correct 33 ms 7340 KB Output is correct
71 Correct 38 ms 7344 KB Output is correct
72 Correct 34 ms 7372 KB Output is correct
73 Correct 35 ms 7596 KB Output is correct
74 Correct 57 ms 7648 KB Output is correct
75 Correct 60 ms 7644 KB Output is correct
76 Correct 53 ms 7640 KB Output is correct
77 Correct 53 ms 7636 KB Output is correct
78 Correct 28 ms 7568 KB Output is correct
79 Correct 53 ms 7660 KB Output is correct
80 Correct 48 ms 7636 KB Output is correct
81 Correct 54 ms 7612 KB Output is correct
82 Correct 53 ms 7616 KB Output is correct
83 Correct 64 ms 7580 KB Output is correct
84 Correct 70 ms 7508 KB Output is correct
85 Correct 66 ms 7508 KB Output is correct
86 Correct 62 ms 7508 KB Output is correct
87 Correct 62 ms 7576 KB Output is correct
88 Correct 64 ms 7508 KB Output is correct
89 Correct 74 ms 7508 KB Output is correct
90 Correct 71 ms 7520 KB Output is correct
91 Correct 73 ms 7508 KB Output is correct
92 Correct 73 ms 7508 KB Output is correct