oj.uz

Submission #104010

# Submission time Handle Problem Language Result Execution time Memory
104010 2019-04-03T16:50:32 Z Erkhemkhuu Mecho (IOI09_mecho) C++17
23 / 100
 1000 ms 66560 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define F first
#define S second
int movex[4] = {-1, 0, 1, 0};
int movey[4] = {0, 1, 0, -1};
char maps[805][805];
int beeStep[805][805], meStep[805][805], n, Mx, My, s, Dx, Dy;
queue <pair <int, int> > bee, me;
bool check(int x, int y) {
	if(x >= 0 && x < n && y >= 0 && y < n) return true;
	return false;
}
bool can(int mid) {
	memset(meStep, -1, sizeof(meStep));
	me.push(mp(Mx * 1000 + My, mid));
	while(!me.empty()) {
		int curx = me.front().F / 1000;
		int cury = me.front().F % 1000;
		int curstep = me.front().S;
		me.pop();
		if(meStep[curx][cury] != -1) continue;
		meStep[curx][cury] = curstep;
		for(int i = 0; i < 4; i++) {
			for(int i1 = 1; i1 <= s; i1++) {
				int movexx = movex[i] * i1 + curx;
				int moveyy = movey[i] * i1 + cury;
				if(check(movexx, moveyy) && maps[movexx][moveyy] != 'T' && meStep[movexx][moveyy] == -1) {
					if(beeStep[movexx][moveyy] != -1 && beeStep[movexx][moveyy] <= curstep) break;
					me.push(mp(movexx * 1000 + moveyy, curstep + 1));
				}
				else break;
			}
		}
	}
	//cout << meStep[Dx][Dy] << " " << beeStep[Dx][Dy] << "\n";
	if(beeStep[Dx][Dy] == -1) beeStep[Dx][Dy] = 1e9;
	if(meStep[Dx][Dy] == -1) return false;
	return meStep[Dx][Dy] < beeStep[Dx][Dy];
}
int main() { 
	int i, j, l, r;
	scanf("%d%d", &n, &s);
	for(i = 0; i < n; i++) {
		scanf("%s", maps[i]);
		for(j = 0; j < n; j++) {
			if(maps[i][j] == 'H')
				bee.push(mp(i * 1000 + j, 0));
			if(maps[i][j] == 'M') {
				Mx = i; My = j;
			}
			if(maps[i][j] == 'D') {
				Dx = i; Dy = j;
			}
		}
	}
	memset(beeStep, -1, sizeof(beeStep));
	while(!bee.empty()) {
		int curx = bee.front().F / 1000;
		int cury = bee.front().F % 1000;
		int curstep = bee.front().S;
		bee.pop();
		if(beeStep[curx][cury] != -1) continue;
		beeStep[curx][cury] = curstep;
		for(int i = 0; i < 4; i++) {
			int movexx = movex[i] + curx;
			int moveyy = movey[i] + cury;
			if(check(movexx, moveyy) && maps[movexx][moveyy] != 'T' && beeStep[movexx][moveyy] == -1)
				bee.push(mp(movexx * 1000 + moveyy, curstep + 1));
		}
	}
	l = 0; r = 1e9;
	while(l != r) {
		int mid = (l + r + 1) / 2;
		if(can(mid)) l = mid ;
		else r = mid - 1;
	}
	printf("%d\n", l);
	return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:46:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &s);
  ~~~~~^~~~~~~~~~~~~~~~
mecho.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s", maps[i]);
   ~~~~~^~~~~~~~~~~~~~~

Subtask #1
23.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 5376 KB Output is correct
2 Incorrect 9 ms 5376 KB Output isn't correct
3 Correct 10 ms 5376 KB Output is correct
4 Incorrect 11 ms 5376 KB Output isn't correct
5 Correct 9 ms 5376 KB Output is correct
6 Incorrect 11 ms 5376 KB Output isn't correct
7 Execution timed out 1064 ms 16732 KB Time limit exceeded
8 Incorrect 9 ms 5376 KB Output isn't correct
9 Correct 10 ms 5376 KB Output is correct
10 Correct 10 ms 5376 KB Output is correct
11 Correct 10 ms 5376 KB Output is correct
12 Incorrect 10 ms 5504 KB Output isn't correct
13 Incorrect 12 ms 5504 KB Output isn't correct
14 Incorrect 11 ms 5504 KB Output isn't correct
15 Correct 11 ms 5376 KB Output is correct
16 Correct 10 ms 5376 KB Output is correct
17 Correct 11 ms 5504 KB Output is correct
18 Correct 10 ms 5376 KB Output is correct
19 Correct 11 ms 5504 KB Output is correct
20 Correct 10 ms 5376 KB Output is correct
21 Correct 11 ms 5504 KB Output is correct
22 Correct 10 ms 5504 KB Output is correct
23 Correct 11 ms 5504 KB Output is correct
24 Correct 10 ms 5376 KB Output is correct
25 Correct 13 ms 5376 KB Output is correct
26 Correct 13 ms 5504 KB Output is correct
27 Correct 12 ms 5504 KB Output is correct
28 Correct 12 ms 5504 KB Output is correct
29 Correct 10 ms 5504 KB Output is correct
30 Correct 11 ms 5504 KB Output is correct
31 Correct 10 ms 5504 KB Output is correct
32 Correct 11 ms 5504 KB Output is correct
33 Correct 15 ms 5760 KB Output is correct
34 Correct 134 ms 6264 KB Output is correct
35 Runtime error 560 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
36 Correct 14 ms 5760 KB Output is correct
37 Correct 57 ms 6400 KB Output is correct
38 Runtime error 336 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
39 Correct 16 ms 5760 KB Output is correct
40 Correct 141 ms 6664 KB Output is correct
41 Runtime error 407 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
42 Correct 14 ms 5760 KB Output is correct
43 Correct 35 ms 6784 KB Output is correct
44 Runtime error 352 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
45 Correct 16 ms 5888 KB Output is correct
46 Correct 173 ms 7168 KB Output is correct
47 Runtime error 258 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
48 Correct 19 ms 5888 KB Output is correct
49 Correct 354 ms 7500 KB Output is correct
50 Runtime error 316 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
51 Correct 25 ms 5888 KB Output is correct
52 Correct 452 ms 7820 KB Output is correct
53 Runtime error 168 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
54 Correct 24 ms 6016 KB Output is correct
55 Correct 804 ms 8088 KB Output is correct
56 Runtime error 171 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
57 Correct 21 ms 6076 KB Output is correct
58 Correct 242 ms 8572 KB Output is correct
59 Runtime error 173 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
60 Correct 23 ms 5996 KB Output is correct
61 Correct 442 ms 8804 KB Output is correct
62 Runtime error 199 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
63 Correct 112 ms 6096 KB Output is correct
64 Incorrect 246 ms 6136 KB Output isn't correct
65 Incorrect 194 ms 6016 KB Output isn't correct
66 Incorrect 157 ms 6008 KB Output isn't correct
67 Incorrect 172 ms 6136 KB Output isn't correct
68 Correct 35 ms 6136 KB Output is correct
69 Incorrect 44 ms 6136 KB Output isn't correct
70 Incorrect 35 ms 6008 KB Output isn't correct
71 Incorrect 38 ms 6144 KB Output isn't correct
72 Incorrect 45 ms 6136 KB Output isn't correct
73 Incorrect 208 ms 6600 KB Output isn't correct
74 Runtime error 250 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
75 Incorrect 521 ms 6728 KB Output isn't correct
76 Incorrect 384 ms 6596 KB Output isn't correct
77 Execution timed out 1070 ms 7812 KB Time limit exceeded
78 Incorrect 990 ms 7248 KB Output isn't correct
79 Runtime error 248 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
80 Incorrect 667 ms 6972 KB Output isn't correct
81 Incorrect 606 ms 6572 KB Output isn't correct
82 Incorrect 959 ms 8888 KB Output isn't correct
83 Correct 848 ms 7012 KB Output is correct
84 Runtime error 336 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
85 Execution timed out 1080 ms 9144 KB Time limit exceeded
86 Execution timed out 1060 ms 7668 KB Time limit exceeded
87 Execution timed out 1079 ms 14196 KB Time limit exceeded
88 Execution timed out 1068 ms 9444 KB Time limit exceeded
89 Runtime error 219 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
90 Execution timed out 1046 ms 15392 KB Time limit exceeded
91 Execution timed out 1078 ms 30828 KB Time limit exceeded
92 Execution timed out 1076 ms 11608 KB Time limit exceeded