Submission #92024

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
92024	2019-01-01T06:29:32 Z	arman_ferdous	Mecho (IOI09_mecho)	C++17	6 / 100	554 ms	66560 KB

mecho

#include <bits/stdc++.h>
using namespace std;
 
#define xx first
#define yy second
typedef pair<int,int> ii;
const int N = 104;
const int inf = 2e9;
 
int n, step, d[N][N], dist[N][N];
char s[N][N];
int dx[] = {1,0,-1,0};
int dy[] = {0,1,0,-1};
 
queue<ii> q;
ii mecho, home;
 
bool can(int t) {
	for(int i = 0; i < n; i++)
		for(int j = 0; j < n; j++)
			dist[i][j] = inf;
 
	q.push(mecho);
	dist[mecho.xx][mecho.yy] = 0;
	while(!q.empty()) {
		ii u = q.front(); q.pop();
		for(int i = 0; i < 4; i++) {
			ii v = {u.xx + dx[i], u.yy + dy[i]};
 
			if(min(v.xx,v.yy) < 0 || n <= max(v.xx,v.yy)) continue;
			char cell = s[v.xx][v.yy];
			if(cell == 'T' || cell == 'M' || cell == 'H') continue;
			int arrival = ceil((double)(dist[u.xx][u.yy] + 1.) / step) + t;
			if(arrival > d[v.xx][v.yy] || dist[u.xx][u.yy] + 1 > dist[v.xx][v.yy]) continue;
			dist[v.xx][v.yy] = dist[u.xx][u.yy] + 1;
			q.push(v);
		}
	}
	return dist[home.xx][home.yy] != inf;
}
 
int main() {
	scanf("%d %d", &n, &step);
	for(int i = 0; i < n; i++)
		scanf(" %s", s[i]);
 
	for(int i = 0; i < n; i++)
		for(int j = 0; j < n; j++) {
			d[i][j] = inf;
			if(s[i][j] == 'M') mecho = {i,j};
			else if(s[i][j] == 'D') home = {i,j};
		}
 
	for(int i = 0; i < n; i++)
		for(int j = 0; j < n; j++) 
			if(s[i][j] == 'H') {
				q.push({i,j});
				d[i][j] = 0;
			}
 
	while(!q.empty()) {
		ii u = q.front(); q.pop();
		for(int i = 0; i < 4; i++) {
			ii v = {u.xx + dx[i], u.yy + dy[i]};
 
			if(min(v.xx,v.yy) < 0 || n <= max(v.xx,v.yy)) continue;
			char cell = s[v.xx][v.yy];
			if(cell == 'T' || cell == 'D' || cell == 'H') continue;
			if(d[v.xx][v.yy] < d[u.xx][u.yy] + 1) continue;
			d[v.xx][v.yy] = d[u.xx][u.yy] + 1;
			q.push(v);
		}
	}
	int lo = 0, hi = n+n, ans = -1;
		while(lo <= hi) {
		int mid = (lo + hi) >> 1;
		if(can(mid)) ans = mid, lo = mid+1;
		else hi = mid-1;
	} printf("%d\n", ans);
	return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &step);
  ~~~~~^~~~~~~~~~~~~~~~~~~~
mecho.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %s", s[i]);
   ~~~~~^~~~~~~~~~~~~

Subtask #1

6.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	2 ms	256 KB	Output isn't correct
2	Incorrect	2 ms	256 KB	Output isn't correct
3	Incorrect	2 ms	256 KB	Output isn't correct
4	Incorrect	2 ms	256 KB	Output isn't correct
5	Correct	2 ms	376 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
8	Incorrect	2 ms	376 KB	Output isn't correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	380 KB	Output is correct
12	Incorrect	2 ms	376 KB	Output isn't correct
13	Runtime error	552 ms	66560 KB	Execution killed with signal 9 (could be triggered by violating memory limits)
14	Runtime error	554 ms	66560 KB	Execution killed with signal 9 (could be triggered by violating memory limits)
15	Incorrect	2 ms	376 KB	Output isn't correct
16	Incorrect	2 ms	376 KB	Output isn't correct
17	Incorrect	2 ms	380 KB	Output isn't correct
18	Incorrect	2 ms	376 KB	Output isn't correct
19	Incorrect	2 ms	376 KB	Output isn't correct
20	Incorrect	2 ms	376 KB	Output isn't correct
21	Incorrect	2 ms	376 KB	Output isn't correct
22	Incorrect	2 ms	376 KB	Output isn't correct
23	Incorrect	2 ms	376 KB	Output isn't correct
24	Incorrect	2 ms	380 KB	Output isn't correct
25	Incorrect	2 ms	380 KB	Output isn't correct
26	Incorrect	2 ms	376 KB	Output isn't correct
27	Incorrect	2 ms	376 KB	Output isn't correct
28	Incorrect	2 ms	376 KB	Output isn't correct
29	Incorrect	2 ms	376 KB	Output isn't correct
30	Incorrect	2 ms	376 KB	Output isn't correct
31	Incorrect	2 ms	376 KB	Output isn't correct
32	Incorrect	2 ms	376 KB	Output isn't correct
33	Runtime error	3 ms	760 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
34	Runtime error	3 ms	632 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
35	Runtime error	2 ms	632 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
36	Runtime error	3 ms	760 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
37	Runtime error	3 ms	760 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
38	Runtime error	3 ms	760 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
39	Runtime error	3 ms	760 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
40	Runtime error	3 ms	760 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
41	Runtime error	3 ms	880 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
42	Runtime error	3 ms	888 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
43	Runtime error	3 ms	888 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
44	Runtime error	3 ms	888 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
45	Runtime error	3 ms	888 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
46	Runtime error	4 ms	892 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
47	Runtime error	3 ms	888 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
48	Runtime error	3 ms	1016 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
49	Runtime error	3 ms	1016 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
50	Runtime error	3 ms	888 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
51	Runtime error	3 ms	1016 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
52	Runtime error	4 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
53	Runtime error	4 ms	1016 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
54	Runtime error	4 ms	1016 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
55	Runtime error	4 ms	1016 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
56	Runtime error	4 ms	1016 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
57	Runtime error	4 ms	1244 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
58	Runtime error	4 ms	1400 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
59	Runtime error	4 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
60	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
61	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
62	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
63	Runtime error	5 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
64	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
65	Runtime error	4 ms	1276 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
66	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
67	Runtime error	4 ms	1276 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
68	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
69	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
70	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
71	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
72	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
73	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
74	Runtime error	4 ms	1276 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
75	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
76	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
77	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
78	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
79	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
80	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
81	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
82	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
83	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
84	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
85	Runtime error	5 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
86	Runtime error	4 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
87	Runtime error	4 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
88	Runtime error	4 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
89	Runtime error	4 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
90	Runtime error	5 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
91	Runtime error	4 ms	1144 KB	Execution killed with signal 11 (could be triggered by violating memory limits)
92	Runtime error	4 ms	1272 KB	Execution killed with signal 11 (could be triggered by violating memory limits)