| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 112516 |
2019-05-20T11:32:42 Z |
Kastanda |
007 (CEOI14_007) |
C++11 |
|
430 ms |
30788 KB |
#include<bits/stdc++.h>
#define pb push_back
using namespace std;
const int N = 200005;
int n, m, a, b, s1, s2, D[2][N], F[N], P[N];
vector < int > vec[N], Adj[N];
inline void BFS(int st, int w, int tp = 0)
{
queue < int > qu;
qu.push(st); D[w][st] = 0;
while (qu.size())
{
int v = qu.front();
qu.pop();
if (tp) vec[D[w][v]].pb(v);
for (int &u : Adj[v])
if (D[w][u] == -1)
D[w][u] = D[w][v] + 1, qu.push(u);
}
}
inline bool Check(int s, int t)
{
if (D[0][t] < D[0][s] || D[1][t] < D[1][s])
return 0;
if (D[0][s] < D[0][t] || D[1][s] < D[1][t])
return 1;
return (F[s] <= F[t]);
}
inline bool CMP(int i, int j)
{
return (D[0][i] < D[0][j]);
}
int main()
{
scanf("%d%d%d%d%d%d", &n, &m, &s1, &s2, &a, &b);
for (int i = 0; i < m; i++)
{
int v, u;
scanf("%d%d", &v, &u);
Adj[v].pb(u);
Adj[u].pb(v);
}
memset(D, -1, sizeof(D));
BFS(s2, 0, 1);
memset(D, -1, sizeof(D));
BFS(a, 0); BFS(b, 1);
memset(F, 63, sizeof(F));
for (int i = 1; i <= n; i++)
P[i] = i;
sort(P + 1, P + n + 1, CMP);
for (int i = 1; i <= n; i++)
{
int v = P[i];
if (D[0][v] == D[1][v])
{
F[v] = D[0][v];
for (int u : Adj[v])
if (D[0][v] == D[0][u] + 1 && D[1][v] == D[1][u] + 1)
F[v] = min(F[v], F[u]);
}
}
for (int i = 0; ; i ++)
for (int v : vec[i])
if (!Check(s1, v))
return !printf("%d\n", i - 1);
return 0;
}
Compilation message
007.cpp: In function 'int main()':
007.cpp:35:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d%d%d%d", &n, &m, &s1, &s2, &a, &b);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:39:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &v, &u);
~~~~~^~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 2 |
Correct |
13 ms |
12160 KB |
Output is correct |
| 3 |
Correct |
13 ms |
12160 KB |
Output is correct |
| 4 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 5 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 6 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 7 |
Correct |
12 ms |
12152 KB |
Output is correct |
| 8 |
Correct |
13 ms |
12160 KB |
Output is correct |
| 9 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 10 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 11 |
Correct |
13 ms |
12032 KB |
Output is correct |
| 12 |
Correct |
13 ms |
12160 KB |
Output is correct |
| 13 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 14 |
Correct |
13 ms |
12160 KB |
Output is correct |
| 15 |
Correct |
13 ms |
12160 KB |
Output is correct |
| 16 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 17 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 18 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 19 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 20 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 21 |
Correct |
11 ms |
12160 KB |
Output is correct |
| 22 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 23 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 24 |
Correct |
12 ms |
12160 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
39 ms |
14376 KB |
Output is correct |
| 2 |
Correct |
53 ms |
15228 KB |
Output is correct |
| 3 |
Correct |
43 ms |
14356 KB |
Output is correct |
| 4 |
Correct |
55 ms |
15480 KB |
Output is correct |
| 5 |
Correct |
38 ms |
14172 KB |
Output is correct |
| 6 |
Correct |
46 ms |
14584 KB |
Output is correct |
| 7 |
Correct |
46 ms |
14840 KB |
Output is correct |
| 8 |
Correct |
45 ms |
14584 KB |
Output is correct |
| 9 |
Correct |
62 ms |
15480 KB |
Output is correct |
| 10 |
Correct |
194 ms |
24056 KB |
Output is correct |
| 11 |
Correct |
81 ms |
16924 KB |
Output is correct |
| 12 |
Correct |
106 ms |
18356 KB |
Output is correct |
| 13 |
Correct |
87 ms |
17272 KB |
Output is correct |
| 14 |
Correct |
75 ms |
16504 KB |
Output is correct |
| 15 |
Correct |
104 ms |
18168 KB |
Output is correct |
| 16 |
Correct |
115 ms |
18552 KB |
Output is correct |
| 17 |
Correct |
101 ms |
17820 KB |
Output is correct |
| 18 |
Correct |
103 ms |
17836 KB |
Output is correct |
| 19 |
Correct |
176 ms |
20572 KB |
Output is correct |
| 20 |
Correct |
307 ms |
26084 KB |
Output is correct |
| 21 |
Correct |
174 ms |
21112 KB |
Output is correct |
| 22 |
Correct |
142 ms |
19576 KB |
Output is correct |
| 23 |
Correct |
337 ms |
20768 KB |
Output is correct |
| 24 |
Correct |
163 ms |
20724 KB |
Output is correct |
| 25 |
Correct |
171 ms |
20060 KB |
Output is correct |
| 26 |
Correct |
153 ms |
19660 KB |
Output is correct |
| 27 |
Correct |
163 ms |
20728 KB |
Output is correct |
| 28 |
Correct |
166 ms |
20600 KB |
Output is correct |
| 29 |
Correct |
221 ms |
23024 KB |
Output is correct |
| 30 |
Correct |
353 ms |
26952 KB |
Output is correct |
| 31 |
Correct |
199 ms |
22552 KB |
Output is correct |
| 32 |
Correct |
179 ms |
20600 KB |
Output is correct |
| 33 |
Correct |
156 ms |
20972 KB |
Output is correct |
| 34 |
Correct |
197 ms |
21468 KB |
Output is correct |
| 35 |
Correct |
165 ms |
21240 KB |
Output is correct |
| 36 |
Correct |
183 ms |
22132 KB |
Output is correct |
| 37 |
Correct |
203 ms |
22564 KB |
Output is correct |
| 38 |
Correct |
202 ms |
22264 KB |
Output is correct |
| 39 |
Correct |
224 ms |
22136 KB |
Output is correct |
| 40 |
Correct |
301 ms |
26396 KB |
Output is correct |
| 41 |
Correct |
430 ms |
30788 KB |
Output is correct |
