| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 101454 |
2019-03-19T02:32:19 Z |
dantoh000 |
007 (CEOI14_007) |
C++14 |
|
452 ms |
61768 KB |
#include <bits/stdc++.h>
using namespace std;
const int maxn = 200001;
const int logn = 18;
int p[logn+1][maxn], h[maxn];
int H[maxn];
int d[maxn];
vector<int> adjlist[maxn];
bitset<maxn> vis;
void dfs(int x){
if (vis[x]) return;
vis[x] = 1;
for (int k = 0; k < logn; k++){
if (p[k][x] == -1) break;
p[k+1][x] = p[k][p[k][x]];
}
for (auto v : adjlist[x]){
if (vis[v]) continue;
//printf("%d -> %d\n",x,v);
p[0][v] = x;
d[v] = d[x]+1;
h[v] = h[x]+1;
dfs(v);
}
}
int lca(int a, int b){
if (h[a] > h[b]) swap(a,b);
for (int k = 0, d= h[b] - h[a]; k < logn; k++){
if (d & (1<<k)) b = p[k][b];
}
if (a==b) return a;
assert(h[a] == h[b]);
for (int k = logn-1; k >=0; --k){
if (p[k][a] != p[k][b])
a = p[k][a], b = p[k][b];
assert(p[0][a] == p[0][b]);
return p[0][a];
}
}
int anc(int x, int d){
for (int k = 0; k <= logn && x != -1; k++){
if (d & (1<<k)) x = p[k][x];
}
return x;
}
int dist(int a, int b){
return d[a] + d[b] - 2*d[lca(a,b)];
}
int main(){
int n,e; scanf("%d%d",&n,&e);
int s0, sn, serve1, serve2;
scanf("%d%d%d%d",&s0,&sn,&serve1,&serve2);
s0--, sn--, serve1--, serve2--;
for (int i = 0; i < e; i++){
int a,b;
scanf("%d%d",&a,&b);
a--; b--;
adjlist[a].push_back(b);
adjlist[b].push_back(a);
}
dfs(serve1);
//printf("%d %d\nvs\n%d %d\n",dist(s0,serve1),dist(s0,serve2),dist(sn,serve1),dist(sn,serve2));
int dist0 = max(dist(s0,serve1),dist(s0,serve2));
int distn = min(dist(sn,serve1),dist(sn,serve2));
//printf("%d %d\n",dist0,distn);
if (dist0 > distn){
printf("-1");
}
else printf("%d",distn-dist0);
}
/*
6 6
1 2 3 4
1 5
5 6
6 3
6 4
1 2
3 4
6 7
5 6 1 2
6 3
1 2
1 3
2 3
1 5
2 4
5 4
7 7
1 7 4 5
1 2
1 3
2 4
3 5
4 6
5 6
6 7
*/
Compilation message
007.cpp: In function 'int lca(int, int)':
007.cpp:39:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
007.cpp: In function 'int main()':
007.cpp:50:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
int n,e; scanf("%d%d",&n,&e);
~~~~~^~~~~~~~~~~~~~
007.cpp:52:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d%d",&s0,&sn,&serve1,&serve2);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&a,&b);
~~~~~^~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
5248 KB |
Output isn't correct |
| 2 |
Incorrect |
7 ms |
5120 KB |
Output isn't correct |
| 3 |
Incorrect |
6 ms |
5120 KB |
Output isn't correct |
| 4 |
Incorrect |
7 ms |
5120 KB |
Output isn't correct |
| 5 |
Partially correct |
7 ms |
5120 KB |
Partially correct |
| 6 |
Runtime error |
14 ms |
10112 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 7 |
Runtime error |
14 ms |
10112 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 8 |
Partially correct |
6 ms |
5120 KB |
Partially correct |
| 9 |
Incorrect |
7 ms |
5120 KB |
Output isn't correct |
| 10 |
Incorrect |
7 ms |
5120 KB |
Output isn't correct |
| 11 |
Incorrect |
7 ms |
5120 KB |
Output isn't correct |
| 12 |
Incorrect |
7 ms |
5248 KB |
Output isn't correct |
| 13 |
Incorrect |
7 ms |
5220 KB |
Output isn't correct |
| 14 |
Runtime error |
16 ms |
10240 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 15 |
Runtime error |
17 ms |
10240 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 16 |
Incorrect |
7 ms |
5248 KB |
Output isn't correct |
| 17 |
Incorrect |
8 ms |
5220 KB |
Output isn't correct |
| 18 |
Incorrect |
8 ms |
5248 KB |
Output isn't correct |
| 19 |
Incorrect |
7 ms |
5248 KB |
Output isn't correct |
| 20 |
Incorrect |
8 ms |
5248 KB |
Output isn't correct |
| 21 |
Incorrect |
8 ms |
5248 KB |
Output isn't correct |
| 22 |
Incorrect |
9 ms |
5248 KB |
Output isn't correct |
| 23 |
Incorrect |
8 ms |
5248 KB |
Output isn't correct |
| 24 |
Incorrect |
7 ms |
5296 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
61 ms |
10204 KB |
Output isn't correct |
| 2 |
Incorrect |
82 ms |
13176 KB |
Output isn't correct |
| 3 |
Incorrect |
54 ms |
10616 KB |
Output isn't correct |
| 4 |
Incorrect |
102 ms |
13176 KB |
Output isn't correct |
| 5 |
Incorrect |
49 ms |
10104 KB |
Output isn't correct |
| 6 |
Incorrect |
49 ms |
11640 KB |
Output isn't correct |
| 7 |
Runtime error |
68 ms |
25336 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 8 |
Incorrect |
66 ms |
11896 KB |
Output isn't correct |
| 9 |
Incorrect |
88 ms |
12536 KB |
Output isn't correct |
| 10 |
Incorrect |
214 ms |
17784 KB |
Output isn't correct |
| 11 |
Incorrect |
128 ms |
16376 KB |
Output isn't correct |
| 12 |
Incorrect |
232 ms |
19320 KB |
Output isn't correct |
| 13 |
Incorrect |
145 ms |
17144 KB |
Output isn't correct |
| 14 |
Incorrect |
126 ms |
15480 KB |
Output isn't correct |
| 15 |
Incorrect |
200 ms |
19796 KB |
Output isn't correct |
| 16 |
Incorrect |
185 ms |
20984 KB |
Output isn't correct |
| 17 |
Runtime error |
222 ms |
44156 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 18 |
Runtime error |
199 ms |
39800 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 19 |
Partially correct |
219 ms |
21624 KB |
Partially correct |
| 20 |
Correct |
330 ms |
24724 KB |
Output is correct |
| 21 |
Incorrect |
287 ms |
26104 KB |
Output isn't correct |
| 22 |
Incorrect |
206 ms |
22952 KB |
Output isn't correct |
| 23 |
Incorrect |
253 ms |
26616 KB |
Output isn't correct |
| 24 |
Incorrect |
258 ms |
25776 KB |
Output isn't correct |
| 25 |
Incorrect |
229 ms |
23888 KB |
Output isn't correct |
| 26 |
Incorrect |
227 ms |
24156 KB |
Output isn't correct |
| 27 |
Runtime error |
324 ms |
58980 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 28 |
Runtime error |
280 ms |
53368 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 29 |
Partially correct |
310 ms |
25680 KB |
Partially correct |
| 30 |
Correct |
439 ms |
26744 KB |
Output is correct |
| 31 |
Incorrect |
286 ms |
29048 KB |
Output isn't correct |
| 32 |
Incorrect |
262 ms |
25132 KB |
Output isn't correct |
| 33 |
Incorrect |
268 ms |
27256 KB |
Output isn't correct |
| 34 |
Incorrect |
268 ms |
26616 KB |
Output isn't correct |
| 35 |
Incorrect |
248 ms |
27376 KB |
Output isn't correct |
| 36 |
Incorrect |
291 ms |
28128 KB |
Output isn't correct |
| 37 |
Incorrect |
306 ms |
30912 KB |
Output isn't correct |
| 38 |
Incorrect |
355 ms |
34636 KB |
Output isn't correct |
| 39 |
Runtime error |
364 ms |
61768 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 40 |
Incorrect |
446 ms |
31992 KB |
Output isn't correct |
| 41 |
Partially correct |
452 ms |
33636 KB |
Partially correct |
