Submission #454802

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
454802	2021-08-05T08:23:30 Z	kingfran1907	007 (CEOI14_007)	C++14	0 / 100	293 ms	16492 KB

007

#include <bits/stdc++.h>
#define X first
#define Y second
 
using namespace std;
typedef long long llint;
 
const int maxn = 2e5+10;
const int base = 31337;
const int mod = 1e9+7;
const int inf = 0x3f3f3f3f;
const int logo = 18;
const int off = 1 << logo;
const int treesiz = off << 1;

int n, m;
int s, d, a, b;
vector< int > graph[maxn];
int disa[maxn], disb[maxn];

void calc(int x, int dis[maxn]) {
	for (int i = 1; i <= n; i++) dis[i] = -1;
	
	queue< int > q;
	dis[x] = 0;
	q.push(x);
	
	while (!q.empty()) {
		int x = q.front();
		q.pop();
		
		for (int tren : graph[x]) {
			if (dis[tren] == -1) {
				dis[tren] = dis[x] + 1;
				q.push(tren);
			}
		}
	}
}

int main() {
	scanf("%d%d", &n, &m);
	scanf("%d%d%d%d", &s, &d, &a, &b);
	
	for (int i = 0; i < m; i++) {
		int x, y;
		scanf("%d%d", &x, &y);
		graph[x].push_back(y);
		graph[y].push_back(x);
	}
	calc(a, disa);
	calc(b, disb);
	
	int ax = disa[d] - disa[s];
	int bx = disb[d] - disb[s];
	if (ax > bx) swap(ax, bx);
	
	if (ax < 0 || bx < 0) printf("-1\n");
	else printf("%d\n", ax);
	return 0;
}

Compilation message

007.cpp: In function 'int main()':
007.cpp:42:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~
007.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |  scanf("%d%d%d%d", &s, &d, &a, &b);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:47:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |   scanf("%d%d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1

0.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	4940 KB	Output is correct
2	Correct	3 ms	4996 KB	Output is correct
3	Correct	3 ms	4940 KB	Output is correct
4	Incorrect	3 ms	5000 KB	Output isn't correct
5	Incorrect	3 ms	4996 KB	Output isn't correct
6	Correct	3 ms	4940 KB	Output is correct
7	Correct	4 ms	4940 KB	Output is correct
8	Incorrect	3 ms	4940 KB	Output isn't correct
9	Correct	4 ms	4996 KB	Output is correct
10	Correct	3 ms	4992 KB	Output is correct
11	Correct	4 ms	4940 KB	Output is correct
12	Incorrect	3 ms	4904 KB	Output isn't correct
13	Correct	3 ms	5000 KB	Output is correct
14	Incorrect	3 ms	4972 KB	Output isn't correct
15	Correct	3 ms	4940 KB	Output is correct
16	Incorrect	3 ms	4940 KB	Output isn't correct
17	Incorrect	3 ms	4940 KB	Output isn't correct
18	Incorrect	3 ms	5164 KB	Output isn't correct
19	Correct	4 ms	4940 KB	Output is correct
20	Correct	3 ms	4996 KB	Output is correct
21	Correct	3 ms	4940 KB	Output is correct
22	Correct	3 ms	4940 KB	Output is correct
23	Correct	4 ms	4940 KB	Output is correct
24	Incorrect	4 ms	5020 KB	Output isn't correct

Subtask #2

0.0 / 70.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	23 ms	6744 KB	Output is correct
2	Incorrect	31 ms	7508 KB	Output isn't correct
3	Correct	24 ms	6904 KB	Output is correct
4	Incorrect	32 ms	7568 KB	Output isn't correct
5	Correct	23 ms	6776 KB	Output is correct
6	Correct	28 ms	6944 KB	Output is correct
7	Correct	26 ms	7180 KB	Output is correct
8	Correct	34 ms	7100 KB	Output is correct
9	Incorrect	41 ms	7492 KB	Output isn't correct
10	Correct	152 ms	11792 KB	Output is correct
11	Incorrect	56 ms	8784 KB	Output isn't correct
12	Correct	88 ms	9668 KB	Output is correct
13	Incorrect	57 ms	8964 KB	Output isn't correct
14	Correct	46 ms	8448 KB	Output is correct
15	Correct	62 ms	9648 KB	Output is correct
16	Correct	88 ms	9924 KB	Output is correct
17	Correct	62 ms	9504 KB	Output is correct
18	Incorrect	64 ms	9512 KB	Output isn't correct
19	Correct	97 ms	10692 KB	Output is correct
20	Incorrect	197 ms	13424 KB	Output isn't correct
21	Incorrect	95 ms	11444 KB	Output isn't correct
22	Correct	83 ms	10612 KB	Output is correct
23	Correct	102 ms	11332 KB	Output is correct
24	Correct	90 ms	11452 KB	Output is correct
25	Incorrect	85 ms	11032 KB	Output isn't correct
26	Correct	91 ms	10748 KB	Output is correct
27	Correct	98 ms	11468 KB	Output is correct
28	Correct	103 ms	11400 KB	Output is correct
29	Correct	162 ms	12016 KB	Output is correct
30	Incorrect	210 ms	14020 KB	Output isn't correct
31	Incorrect	104 ms	12372 KB	Output isn't correct
32	Correct	99 ms	11332 KB	Output is correct
33	Correct	125 ms	11680 KB	Output is correct
34	Incorrect	149 ms	11900 KB	Output isn't correct
35	Incorrect	108 ms	11708 KB	Output isn't correct
36	Incorrect	126 ms	11960 KB	Output isn't correct
37	Correct	134 ms	12772 KB	Output is correct
38	Correct	158 ms	12620 KB	Output is correct
39	Correct	138 ms	12712 KB	Output is correct
40	Incorrect	217 ms	14240 KB	Output isn't correct
41	Correct	293 ms	16492 KB	Output is correct