Submission #484833

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
484833	2021-11-05T15:13:37 Z	PoPularPlusPlus	Mecho (IOI09_mecho)	C++17	84 / 100	235 ms	9380 KB

mecho

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long 
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 1000000007; 
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;
bool remender(ll a , ll b){return a%b;}

void clear( std::queue<pair<int,int>> &q )
{
   std::queue<pair<int,int>> empty;
   std::swap( q, empty );
}

void solve(){
	int dx[4] = {0,0,-1,1} , dy[4] = {1,-1,0,0};
	int n , s;
	cin >> n >> s;
	char arr[n][n];
	for(int i = 0; i < n; i++){
		for(int j = 0; j < n; j++)cin >> arr[i][j];
	}
	queue<pair<int,int>> q;
	ll dis[n][n];
	for(int i = 0; i < n; i++){
		for(int j = 0; j < n; j++)dis[i][j] = 1e18;
	}
	bool vis[n][n];
	memset(vis,0,sizeof vis);
	pair<int,int> end, start;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < n; j++){
			if(arr[i][j] == 'H'){q.push(mp(i,j));dis[i][j] = 0;vis[i][j] = 1;}
			if(arr[i][j] == 'D')end = mp(i,j);
			if(arr[i][j] == 'M')start = mp(i,j);
		}
	}
	while(q.size()){
		pair<int,int> node = q.front();
		q.pop();
		for(int i = 0; i < 4; i++){
			if(node.vf + dx[i] >= 0 && node.vf + dx[i] < n && node.vs + dy[i] < n && node.vs + dy[i] >= 0 && !vis[node.vf + dx[i]][node.vs + dy[i]] && arr[node.vf + dx[i]][node.vs + dy[i]] == 'G'){
				q.push(mp(node.vf + dx[i] , node.vs + dy[i]));
				dis[node.vf + dx[i]][node.vs + dy[i]] = dis[node.vf][node.vs] + 1;
				vis[node.vf + dx[i]][node.vs + dy[i]] = 1;
			}
		}
	}
	int dis1[n][n];
	int l = 0 , r = n * n + 3;
	int ans = -1;
	while(l <= r){
		int mid = (l + r)/2;
		memset(dis1,-1,sizeof dis1);
		dis1[start.vf][start.vs] = s * mid;
		memset(vis,0,sizeof vis);
		vis[start.vf][start.vs] = 1;
		clear(q);
		q.push(mp(start.vf , start.vs));
		while(q.size() && !vis[end.vf][end.vs]){
			pair<int,int> node = q.front();
			q.pop();
			for(int i = 0; i < 4; i++){
				if(node.vf + dx[i] >= 0 && node.vf + dx[i] < n && node.vs + dy[i] < n && node.vs + dy[i] >= 0 && !vis[node.vf + dx[i]][node.vs + dy[i]] && (arr[node.vf + dx[i]][node.vs + dy[i]] == 'G' || arr[node.vf + dx[i]][node.vs + dy[i]] == 'D') && dis[node.vf + dx[i]][node.vs + dy[i]] > (dis1[node.vf][node.vs] + 1)/s){
					q.push(mp(node.vf + dx[i] , node.vs + dy[i]));
					dis1[node.vf + dx[i]][node.vs + dy[i]] = dis1[node.vf][node.vs] + 1;
					vis[node.vf + dx[i]][node.vs + dy[i]] = 1;
				}
			}
		}
		if(vis[end.vf][end.vs]){
			ans = mid;
			l = mid + 1;
		}
		else r = mid - 1;
	}
	cout << ans << '\n';
}

int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
	//int t;cin >> t;while(t--)
	solve();
	return 0;
}

Subtask #1

84.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	0 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	91 ms	9120 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Incorrect	1 ms	332 KB	Output isn't correct
13	Incorrect	0 ms	332 KB	Output isn't correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	0 ms	204 KB	Output is correct
17	Correct	0 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	0 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	0 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	1 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	1 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	1 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	0 ms	332 KB	Output is correct
31	Correct	0 ms	332 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	4 ms	1868 KB	Output is correct
34	Correct	4 ms	1868 KB	Output is correct
35	Correct	20 ms	1992 KB	Output is correct
36	Correct	5 ms	2380 KB	Output is correct
37	Correct	5 ms	2500 KB	Output is correct
38	Correct	33 ms	2480 KB	Output is correct
39	Correct	9 ms	3064 KB	Output is correct
40	Correct	8 ms	3056 KB	Output is correct
41	Correct	37 ms	3020 KB	Output is correct
42	Correct	9 ms	3672 KB	Output is correct
43	Correct	8 ms	3668 KB	Output is correct
44	Correct	43 ms	3724 KB	Output is correct
45	Correct	9 ms	4444 KB	Output is correct
46	Correct	10 ms	4448 KB	Output is correct
47	Correct	50 ms	4428 KB	Output is correct
48	Correct	13 ms	5140 KB	Output is correct
49	Correct	12 ms	5196 KB	Output is correct
50	Correct	70 ms	5244 KB	Output is correct
51	Correct	15 ms	5984 KB	Output is correct
52	Correct	17 ms	5976 KB	Output is correct
53	Correct	76 ms	5976 KB	Output is correct
54	Correct	16 ms	6924 KB	Output is correct
55	Correct	16 ms	6932 KB	Output is correct
56	Correct	92 ms	7008 KB	Output is correct
57	Correct	18 ms	8012 KB	Output is correct
58	Correct	20 ms	7892 KB	Output is correct
59	Correct	129 ms	8000 KB	Output is correct
60	Correct	21 ms	8992 KB	Output is correct
61	Correct	21 ms	9008 KB	Output is correct
62	Correct	122 ms	8992 KB	Output is correct
63	Correct	109 ms	9060 KB	Output is correct
64	Correct	235 ms	9056 KB	Output is correct
65	Correct	159 ms	9060 KB	Output is correct
66	Correct	122 ms	9028 KB	Output is correct
67	Correct	124 ms	9160 KB	Output is correct
68	Correct	50 ms	9012 KB	Output is correct
69	Correct	49 ms	8988 KB	Output is correct
70	Correct	40 ms	9028 KB	Output is correct
71	Correct	43 ms	9088 KB	Output is correct
72	Incorrect	35 ms	9028 KB	Output isn't correct
73	Incorrect	77 ms	9232 KB	Output isn't correct
74	Correct	63 ms	9248 KB	Output is correct
75	Correct	80 ms	9332 KB	Output is correct
76	Correct	65 ms	9280 KB	Output is correct
77	Correct	65 ms	9244 KB	Output is correct
78	Correct	80 ms	9288 KB	Output is correct
79	Correct	49 ms	9244 KB	Output is correct
80	Correct	60 ms	9380 KB	Output is correct
81	Correct	67 ms	9284 KB	Output is correct
82	Correct	85 ms	9284 KB	Output is correct
83	Correct	79 ms	9268 KB	Output is correct
84	Correct	75 ms	9268 KB	Output is correct
85	Correct	77 ms	9268 KB	Output is correct
86	Correct	79 ms	9220 KB	Output is correct
87	Correct	81 ms	9252 KB	Output is correct
88	Correct	79 ms	9136 KB	Output is correct
89	Correct	81 ms	9164 KB	Output is correct
90	Correct	82 ms	9164 KB	Output is correct
91	Correct	83 ms	9156 KB	Output is correct
92	Correct	89 ms	9220 KB	Output is correct