oj.uz

Submission #742736

# Submission time Handle Problem Language Result Execution time Memory
742736 2023-05-16T20:19:21 Z CSQ31 Mecho (IOI09_mecho) C++17
84 / 100
 168 ms 7676 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;
	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];
		int k = d/s;
		if(k+tim >= bdist[v.fi][v.se]){
			dist[v.fi][v.se] = 1e9;
			continue;
		}
		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 && grid[x][y] != 'H' && grid[x][y] != 'T' && dist[x][y] ==1e9){
				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'){
				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
84.0 / 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 284 KB Output is correct
6 Correct 0 ms 464 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 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Incorrect 1 ms 852 KB Output isn't correct
13 Incorrect 1 ms 724 KB Output isn't 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 0 ms 468 KB Output is correct
21 Correct 0 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 3412 KB Output is correct
34 Correct 6 ms 3412 KB Output is correct
35 Correct 18 ms 3412 KB Output is correct
36 Correct 6 ms 3796 KB Output is correct
37 Correct 7 ms 3796 KB Output is correct
38 Correct 23 ms 3864 KB Output is correct
39 Correct 8 ms 4180 KB Output is correct
40 Correct 10 ms 4180 KB Output is correct
41 Correct 31 ms 4180 KB Output is correct
42 Correct 9 ms 4644 KB Output is correct
43 Correct 14 ms 4696 KB Output is correct
44 Correct 40 ms 4728 KB Output is correct
45 Correct 12 ms 5064 KB Output is correct
46 Correct 17 ms 5076 KB Output is correct
47 Correct 44 ms 5100 KB Output is correct
48 Correct 12 ms 5588 KB Output is correct
49 Correct 15 ms 5588 KB Output is correct
50 Correct 52 ms 5608 KB Output is correct
51 Correct 14 ms 5972 KB Output is correct
52 Correct 18 ms 5972 KB Output is correct
53 Correct 81 ms 6048 KB Output is correct
54 Correct 16 ms 6500 KB Output is correct
55 Correct 25 ms 6508 KB Output is correct
56 Correct 76 ms 6484 KB Output is correct
57 Correct 20 ms 6868 KB Output is correct
58 Correct 24 ms 6868 KB Output is correct
59 Correct 87 ms 6924 KB Output is correct
60 Correct 20 ms 7376 KB Output is correct
61 Correct 26 ms 7364 KB Output is correct
62 Correct 106 ms 7380 KB Output is correct
63 Correct 100 ms 7360 KB Output is correct
64 Correct 168 ms 7360 KB Output is correct
65 Correct 155 ms 7320 KB Output is correct
66 Correct 111 ms 7444 KB Output is correct
67 Correct 31 ms 7292 KB Output is correct
68 Correct 46 ms 7372 KB Output is correct
69 Correct 44 ms 7392 KB Output is correct
70 Correct 32 ms 7296 KB Output is correct
71 Correct 37 ms 7348 KB Output is correct
72 Incorrect 34 ms 7388 KB Output isn't correct
73 Incorrect 59 ms 7596 KB Output isn't correct
74 Correct 60 ms 7640 KB Output is correct
75 Correct 60 ms 7596 KB Output is correct
76 Correct 60 ms 7644 KB Output is correct
77 Correct 55 ms 7624 KB Output is correct
78 Correct 27 ms 7636 KB Output is correct
79 Correct 53 ms 7532 KB Output is correct
80 Correct 49 ms 7620 KB Output is correct
81 Correct 58 ms 7616 KB Output is correct
82 Correct 55 ms 7676 KB Output is correct
83 Correct 64 ms 7532 KB Output is correct
84 Correct 62 ms 7508 KB Output is correct
85 Correct 65 ms 7580 KB Output is correct
86 Correct 67 ms 7572 KB Output is correct
87 Correct 71 ms 7576 KB Output is correct
88 Correct 69 ms 7520 KB Output is correct
89 Correct 73 ms 7480 KB Output is correct
90 Correct 69 ms 7488 KB Output is correct
91 Correct 70 ms 7524 KB Output is correct
92 Correct 74 ms 7524 KB Output is correct