Submission #117597

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
117597	2019-06-16T18:07:46 Z	KieranHorgan	Mecho (IOI09_mecho)	C++17	5 / 100	14 ms	3584 KB

mecho

#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>

using namespace std;
#define endl '\n'
#define ll long long
#define int short
#define ld double
#define pii pair<int,int>
#define rand() abs((rand()<<15)|rand())
#define randll() abs(((long long)rand()<<30)|rand())
const int MOD = 1000000007;

char grid[805][805];
int dist1[805][805];
pair<int,int> dist3[805][805];
int dist2[805][805];
int dist[805][805];
int vis[805][805];

signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	long long seed;
	asm("rdtsc" : "=A"(seed));
	srand(seed);

	int n, s;
	cin >> n >> s;
	int si, sj;
	int fi, fj;
	vector<pair<int,int>> p;
	for(int i = 1; i <= n; i++) {
		for(int j = 1; j <= n; j++) {
			cin >> grid[i][j];
			if(grid[i][j]=='J') {
				si = i;
				sj = j;
			}
			if(grid[i][j]=='H') {
				fi = i;
				fj = j;
			}
			if(grid[i][j]=='P') {
				p.push_back({i,j});
			}
			if(grid[i][j]=='B') grid[i][j]=0;
		}
	}

	vector<int> di = {1,0,-1,0};
	vector<int> dj = {0,1,0,-1};

	queue<pair<int,pair<int,int>>> q;

	memset(dist1,-1,sizeof(dist1));
	dist1[si][sj]=0;
	q.push({0,{si,sj}});
	while(!q.empty()) {
		int d = q.front().first;
		int i = q.front().second.first;
		int j = q.front().second.second;
		q.pop();
		for(int x = 0; x < 4; x++) {
			if(grid[i+di[x]][j+dj[x]] == 0) continue;
			if(dist1[i+di[x]][j+dj[x]] != -1) continue;
			dist1[i+di[x]][j+dj[x]] = d+1;
			q.push({d+1,{i+di[x],j+dj[x]}});
		}
	}
	for(int i = 1; i <= n; i++)
		for(int j = 1; j <= n; j++)
			if(dist1[i][j]>0) {
				dist3[i][j] = {(dist1[i][j]+s-1)/s,(dist1[i][j]+s-1)%s};
			}



	memset(dist2,-1,sizeof(dist2));
	for(auto pp: p) {
		int pi = pp.first;
		int pj = pp.second;
		dist2[pi][pj]=0;
		q.push({0,{pi,pj}});
	}
	while(!q.empty()) {
		int d = q.front().first;
		int i = q.front().second.first;
		int j = q.front().second.second;
		q.pop();
		for(int x = 0; x < 4; x++) {
			if(grid[i+di[x]][j+dj[x]] == 0) continue;
			if(dist2[i+di[x]][j+dj[x]] != -1) continue;
			if(grid[i+di[x]][j+dj[x]] == 'H') continue;
			dist2[i+di[x]][j+dj[x]] = d+1;
			q.push({d+1,{i+di[x],j+dj[x]}});
		}
	}


	for(int i = 1; i <= n; i++)
		for(int j = 1; j <= n; j++)
			if(dist1[i][j]>=0) {
				dist[i][j] = dist2[i][j]-dist3[i][j].first-(dist3[i][j].second==s-1);
			}

	// for(int i = 1; i <= n; i++) {
		// for(int j = 1; j <= n; j++) {
			// cerr << dist3[i][j].first << ":" << dist3[i][j].second << " ";
		// }
		// cerr << endl;
	// }
	// cerr << endl;
	// for(int i = 1; i <= n; i++) {
		// for(int j = 1; j <= n; j++) {
			// cerr << dist2[i][j] << " ";
		// }
		// cerr << endl;
	// }
	// cerr << endl;
	// for(int i = 1; i <= n; i++) {
		// for(int j = 1; j <= n; j++) {
			// cerr << dist[i][j] << " ";
		// }
		// cerr << endl;
	// }
	// cerr << endl;

	priority_queue<pair<int,pair<int,int>>> pq;
	pq.push({dist[si][sj], {si, sj}});
	int ans = dist[si][sj];
	bool toBreak = 0;
	while(!pq.empty()) {
		int d = pq.top().first;
		int i = pq.top().second.first;
		int j = pq.top().second.second;
		pq.pop();
		ans = min(ans, d);
		if(i==fi && j == fj) break;
		for(int x = 0; x < 4; x++) {
			if(grid[i+di[x]][j+dj[x]] == 'H') {toBreak = 1; break;}
			if(grid[i+di[x]][j+dj[x]] == 0) continue;
			if(dist1[i+di[x]][j+dj[x]] <= 0) continue;
			if(vis[i+di[x]][j+dj[x]]) continue;
			vis[i+di[x]][j+dj[x]] = 1;
			pq.push({dist[i+di[x]][j+dj[x]],{i+di[x],j+dj[x]}});
		}
		if(toBreak)break;
	}
	cout << ans << endl;
}

Compilation message

mecho.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("unroll-loops")
 
mecho.cpp:14:17: warning: overflow in implicit constant conversion [-Woverflow]
 const int MOD = 1000000007;
                 ^~~~~~~~~~
mecho.cpp: In function 'int main()':
mecho.cpp:141:17: warning: 'fj' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(i==fi && j == fj) break;
               ~~^~~~~
mecho.cpp:141:7: warning: 'fi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(i==fi && j == fj) break;
      ~^~~~

Subtask #1

5.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	4 ms	2944 KB	Output isn't correct
2	Incorrect	3 ms	2944 KB	Output isn't correct
3	Incorrect	4 ms	2944 KB	Output isn't correct
4	Incorrect	4 ms	2944 KB	Output isn't correct
5	Correct	5 ms	2944 KB	Output is correct
6	Incorrect	4 ms	2944 KB	Output isn't correct
7	Incorrect	12 ms	3456 KB	Output isn't correct
8	Incorrect	4 ms	2944 KB	Output isn't correct
9	Incorrect	4 ms	2944 KB	Output isn't correct
10	Incorrect	4 ms	2944 KB	Output isn't correct
11	Incorrect	4 ms	2944 KB	Output isn't correct
12	Incorrect	5 ms	2944 KB	Output isn't correct
13	Correct	4 ms	2944 KB	Output is correct
14	Incorrect	4 ms	2944 KB	Output isn't correct
15	Incorrect	4 ms	2944 KB	Output isn't correct
16	Incorrect	4 ms	2944 KB	Output isn't correct
17	Incorrect	4 ms	2944 KB	Output isn't correct
18	Incorrect	4 ms	2944 KB	Output isn't correct
19	Incorrect	4 ms	2944 KB	Output isn't correct
20	Incorrect	4 ms	2944 KB	Output isn't correct
21	Incorrect	4 ms	2944 KB	Output isn't correct
22	Incorrect	4 ms	2944 KB	Output isn't correct
23	Incorrect	4 ms	2944 KB	Output isn't correct
24	Incorrect	4 ms	2944 KB	Output isn't correct
25	Incorrect	4 ms	2944 KB	Output isn't correct
26	Incorrect	4 ms	2944 KB	Output isn't correct
27	Incorrect	4 ms	2944 KB	Output isn't correct
28	Incorrect	4 ms	2944 KB	Output isn't correct
29	Incorrect	4 ms	2944 KB	Output isn't correct
30	Incorrect	4 ms	2944 KB	Output isn't correct
31	Incorrect	5 ms	2944 KB	Output isn't correct
32	Incorrect	4 ms	2944 KB	Output isn't correct
33	Incorrect	6 ms	3200 KB	Output isn't correct
34	Incorrect	6 ms	3200 KB	Output isn't correct
35	Incorrect	6 ms	3200 KB	Output isn't correct
36	Incorrect	7 ms	3200 KB	Output isn't correct
37	Incorrect	6 ms	3200 KB	Output isn't correct
38	Incorrect	6 ms	3200 KB	Output isn't correct
39	Incorrect	7 ms	3200 KB	Output isn't correct
40	Incorrect	7 ms	3200 KB	Output isn't correct
41	Incorrect	7 ms	3200 KB	Output isn't correct
42	Incorrect	9 ms	3328 KB	Output isn't correct
43	Incorrect	7 ms	3328 KB	Output isn't correct
44	Incorrect	10 ms	3328 KB	Output isn't correct
45	Incorrect	8 ms	3328 KB	Output isn't correct
46	Incorrect	8 ms	3328 KB	Output isn't correct
47	Incorrect	8 ms	3328 KB	Output isn't correct
48	Incorrect	9 ms	3328 KB	Output isn't correct
49	Incorrect	10 ms	3456 KB	Output isn't correct
50	Incorrect	9 ms	3328 KB	Output isn't correct
51	Incorrect	10 ms	3456 KB	Output isn't correct
52	Incorrect	9 ms	3456 KB	Output isn't correct
53	Incorrect	9 ms	3456 KB	Output isn't correct
54	Incorrect	10 ms	3456 KB	Output isn't correct
55	Incorrect	10 ms	3456 KB	Output isn't correct
56	Incorrect	10 ms	3456 KB	Output isn't correct
57	Incorrect	11 ms	3456 KB	Output isn't correct
58	Incorrect	11 ms	3456 KB	Output isn't correct
59	Incorrect	12 ms	3456 KB	Output isn't correct
60	Incorrect	13 ms	3584 KB	Output isn't correct
61	Incorrect	13 ms	3556 KB	Output isn't correct
62	Incorrect	13 ms	3584 KB	Output isn't correct
63	Correct	12 ms	3456 KB	Output is correct
64	Incorrect	12 ms	3584 KB	Output isn't correct
65	Incorrect	12 ms	3584 KB	Output isn't correct
66	Incorrect	13 ms	3584 KB	Output isn't correct
67	Incorrect	12 ms	3456 KB	Output isn't correct
68	Correct	13 ms	3576 KB	Output is correct
69	Incorrect	12 ms	3584 KB	Output isn't correct
70	Incorrect	13 ms	3584 KB	Output isn't correct
71	Incorrect	12 ms	3584 KB	Output isn't correct
72	Incorrect	12 ms	3584 KB	Output isn't correct
73	Incorrect	12 ms	3456 KB	Output isn't correct
74	Incorrect	12 ms	3456 KB	Output isn't correct
75	Incorrect	12 ms	3456 KB	Output isn't correct
76	Incorrect	13 ms	3456 KB	Output isn't correct
77	Incorrect	12 ms	3584 KB	Output isn't correct
78	Incorrect	12 ms	3456 KB	Output isn't correct
79	Incorrect	12 ms	3456 KB	Output isn't correct
80	Incorrect	13 ms	3456 KB	Output isn't correct
81	Incorrect	12 ms	3584 KB	Output isn't correct
82	Incorrect	12 ms	3456 KB	Output isn't correct
83	Correct	12 ms	3584 KB	Output is correct
84	Incorrect	12 ms	3456 KB	Output isn't correct
85	Incorrect	12 ms	3584 KB	Output isn't correct
86	Incorrect	13 ms	3584 KB	Output isn't correct
87	Incorrect	12 ms	3584 KB	Output isn't correct
88	Correct	13 ms	3584 KB	Output is correct
89	Incorrect	13 ms	3584 KB	Output isn't correct
90	Incorrect	13 ms	3584 KB	Output isn't correct
91	Incorrect	13 ms	3584 KB	Output isn't correct
92	Incorrect	14 ms	3584 KB	Output isn't correct