Submission #65951

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
65951	2018-08-09T06:57:20 Z	ikura355	007 (CEOI14_007)	C++14	0 / 100	469 ms	102880 KB

007

#include<bits/stdc++.h>
using namespace std;

const int maxn = 2e5 + 5;
const int inf = 1e9;

struct node {
	int u,val;
	node(int _u = 0, int _val = 0) {
		u = _u; val = _val;
	}
	bool operator < (node a) const {
		return a.val<val;
	}
};

int n,m,a,b,s1,s2;
vector<int> way[maxn];
int len[maxn];
priority_queue<node> heap;
int d1[maxn], d2[maxn];

int sssp(int u) {
	for(int i=1;i<=n;i++) len[i] = inf;
	len[u] = 0;
	heap.push(node(u,0));
	while(!heap.empty()) {
		auto t = heap.top(); heap.pop();
		int u = t.u, val = t.val;
		if(len[u]!=val) continue;
		for(auto v : way[u]) {
			if(len[v] > len[u] + 1) {
				len[v] = len[u] + 1;
				heap.push(node(v,len[v]));
			}
		}
	}
}

int main() {
	scanf("%d%d",&n,&m);
	scanf("%d%d%d%d",&a,&b,&s1,&s2);
	for(int i=1;i<=m;i++) {
		int u,v; scanf("%d%d",&u,&v);
		way[u].push_back(v); way[v].push_back(u);
	}
	sssp(a);
	for(int i=1;i<=n;i++) d1[i] = len[i];
	sssp(b);
	for(int i=1;i<=n;i++) d2[i] = len[i];
	if(d2[s1]<d1[s1] || d2[s2]<d1[s2]) printf("-1");
	else printf("%d",min(d2[s1]-d1[s1], d2[s2]-d1[s2]));
}

Compilation message

007.cpp: In function 'int sssp(int)':
007.cpp:38:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
007.cpp: In function 'int main()':
007.cpp:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
007.cpp:42:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d",&a,&b,&s1,&s2);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:44:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int u,v; scanf("%d%d",&u,&v);
            ~~~~~^~~~~~~~~~~~~~

Subtask #1

0.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	5052 KB	Output is correct
2	Correct	8 ms	5100 KB	Output is correct
3	Correct	8 ms	5100 KB	Output is correct
4	Incorrect	7 ms	5284 KB	Output isn't correct
5	Incorrect	7 ms	5284 KB	Output isn't correct
6	Correct	6 ms	5288 KB	Output is correct
7	Correct	9 ms	5320 KB	Output is correct
8	Incorrect	7 ms	5320 KB	Output isn't correct
9	Correct	8 ms	5384 KB	Output is correct
10	Correct	7 ms	5384 KB	Output is correct
11	Correct	7 ms	5384 KB	Output is correct
12	Incorrect	6 ms	5452 KB	Output isn't correct
13	Correct	6 ms	5452 KB	Output is correct
14	Incorrect	6 ms	5452 KB	Output isn't correct
15	Correct	7 ms	5452 KB	Output is correct
16	Incorrect	7 ms	5516 KB	Output isn't correct
17	Incorrect	7 ms	5540 KB	Output isn't correct
18	Incorrect	7 ms	5564 KB	Output isn't correct
19	Correct	7 ms	5572 KB	Output is correct
20	Correct	8 ms	5596 KB	Output is correct
21	Correct	8 ms	5596 KB	Output is correct
22	Correct	7 ms	5612 KB	Output is correct
23	Correct	7 ms	5636 KB	Output is correct
24	Incorrect	8 ms	5644 KB	Output isn't correct

Subtask #2

0.0 / 70.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	55 ms	7820 KB	Output is correct
2	Incorrect	78 ms	9288 KB	Output isn't correct
3	Correct	47 ms	9288 KB	Output is correct
4	Incorrect	49 ms	10540 KB	Output isn't correct
5	Correct	55 ms	10540 KB	Output is correct
6	Correct	44 ms	10952 KB	Output is correct
7	Correct	58 ms	11592 KB	Output is correct
8	Correct	54 ms	12152 KB	Output is correct
9	Incorrect	70 ms	13744 KB	Output isn't correct
10	Correct	227 ms	23148 KB	Output is correct
11	Incorrect	110 ms	23148 KB	Output isn't correct
12	Correct	150 ms	23788 KB	Output is correct
13	Incorrect	113 ms	24292 KB	Output isn't correct
14	Correct	86 ms	24716 KB	Output is correct
15	Correct	116 ms	27348 KB	Output is correct
16	Correct	139 ms	29140 KB	Output is correct
17	Correct	121 ms	29972 KB	Output is correct
18	Incorrect	144 ms	31344 KB	Output isn't correct
19	Correct	163 ms	34972 KB	Output is correct
20	Incorrect	309 ms	43284 KB	Output isn't correct
21	Incorrect	146 ms	43476 KB	Output isn't correct
22	Correct	171 ms	44248 KB	Output is correct
23	Correct	148 ms	47040 KB	Output is correct
24	Correct	139 ms	48932 KB	Output is correct
25	Incorrect	153 ms	50412 KB	Output isn't correct
26	Correct	146 ms	51996 KB	Output is correct
27	Correct	185 ms	54556 KB	Output is correct
28	Correct	223 ms	56616 KB	Output is correct
29	Correct	231 ms	60636 KB	Output is correct
30	Incorrect	347 ms	68452 KB	Output isn't correct
31	Incorrect	224 ms	69204 KB	Output isn't correct
32	Correct	227 ms	70004 KB	Output is correct
33	Correct	195 ms	72416 KB	Output is correct
34	Incorrect	250 ms	74988 KB	Output isn't correct
35	Incorrect	165 ms	76696 KB	Output isn't correct
36	Incorrect	168 ms	79140 KB	Output isn't correct
37	Correct	242 ms	82536 KB	Output is correct
38	Correct	232 ms	84784 KB	Output is correct
39	Correct	313 ms	87180 KB	Output is correct
40	Incorrect	355 ms	93364 KB	Output isn't correct
41	Correct	469 ms	102880 KB	Output is correct