Submission #484847

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
484847	2021-11-05T15:50:54 Z	PoPularPlusPlus	Mecho (IOI09_mecho)	C++17	84 / 100	220 ms	9668 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;
	if(dis[start.vf][start.vs] != 1e18)r = dis[start.vf][start.vs]-1;
	int ans = -1;
	while(l <= r){
		int mid = (l + r)/2;
		dis1[start.vf][start.vs] = s * mid;
		memset(vis,0,sizeof vis);
		vis[start.vf][start.vs] = 1;
		q.push(mp(start.vf , start.vs));
		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' || 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	0 ms	204 KB	Output is correct
4	Correct	0 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	81 ms	9412 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	0 ms	312 KB	Output is correct
12	Incorrect	0 ms	332 KB	Output isn't correct
13	Incorrect	1 ms	320 KB	Output isn't correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	0 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	0 ms	320 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	0 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	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	1 ms	316 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	320 KB	Output is correct
33	Correct	5 ms	1984 KB	Output is correct
34	Correct	5 ms	1996 KB	Output is correct
35	Correct	21 ms	2092 KB	Output is correct
36	Correct	7 ms	2636 KB	Output is correct
37	Correct	7 ms	2508 KB	Output is correct
38	Correct	27 ms	2636 KB	Output is correct
39	Correct	8 ms	3148 KB	Output is correct
40	Correct	9 ms	3148 KB	Output is correct
41	Correct	37 ms	3220 KB	Output is correct
42	Correct	11 ms	3916 KB	Output is correct
43	Correct	12 ms	3896 KB	Output is correct
44	Correct	46 ms	3916 KB	Output is correct
45	Correct	14 ms	4672 KB	Output is correct
46	Correct	17 ms	4684 KB	Output is correct
47	Correct	64 ms	4668 KB	Output is correct
48	Correct	14 ms	5452 KB	Output is correct
49	Correct	15 ms	5496 KB	Output is correct
50	Correct	72 ms	5500 KB	Output is correct
51	Correct	16 ms	6348 KB	Output is correct
52	Correct	18 ms	6236 KB	Output is correct
53	Correct	83 ms	6348 KB	Output is correct
54	Correct	19 ms	7244 KB	Output is correct
55	Correct	22 ms	7284 KB	Output is correct
56	Correct	105 ms	7268 KB	Output is correct
57	Correct	22 ms	8132 KB	Output is correct
58	Correct	27 ms	8192 KB	Output is correct
59	Correct	111 ms	8208 KB	Output is correct
60	Correct	23 ms	9256 KB	Output is correct
61	Correct	27 ms	9256 KB	Output is correct
62	Correct	133 ms	9276 KB	Output is correct
63	Correct	108 ms	9240 KB	Output is correct
64	Correct	220 ms	9468 KB	Output is correct
65	Correct	165 ms	9284 KB	Output is correct
66	Correct	123 ms	9252 KB	Output is correct
67	Correct	115 ms	9320 KB	Output is correct
68	Correct	50 ms	9248 KB	Output is correct
69	Correct	49 ms	9284 KB	Output is correct
70	Correct	41 ms	9284 KB	Output is correct
71	Correct	44 ms	9240 KB	Output is correct
72	Incorrect	35 ms	9344 KB	Output isn't correct
73	Incorrect	72 ms	9596 KB	Output isn't correct
74	Correct	58 ms	9520 KB	Output is correct
75	Correct	80 ms	9540 KB	Output is correct
76	Correct	70 ms	9516 KB	Output is correct
77	Correct	63 ms	9500 KB	Output is correct
78	Correct	85 ms	9568 KB	Output is correct
79	Correct	50 ms	9540 KB	Output is correct
80	Correct	57 ms	9564 KB	Output is correct
81	Correct	68 ms	9668 KB	Output is correct
82	Correct	61 ms	9540 KB	Output is correct
83	Correct	76 ms	9532 KB	Output is correct
84	Correct	68 ms	9456 KB	Output is correct
85	Correct	78 ms	9496 KB	Output is correct
86	Correct	75 ms	9524 KB	Output is correct
87	Correct	82 ms	9544 KB	Output is correct
88	Correct	79 ms	9548 KB	Output is correct
89	Correct	78 ms	9468 KB	Output is correct
90	Correct	81 ms	9412 KB	Output is correct
91	Correct	81 ms	9484 KB	Output is correct
92	Correct	92 ms	9480 KB	Output is correct