| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 110762 |
2019-05-12T07:56:55 Z |
Mahdi_Jfri |
007 (CEOI14_007) |
C++14 |
|
403 ms |
19556 KB |
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
const int maxn = 2e5 + 20;
vector<int> adj[maxn];
int d[3][maxn] , x[maxn];
void bfs(int src , int k)
{
memset(d[k] , 63 , sizeof d[k]);
queue<int> q;
q.push(src);
d[k][src] = 0;
while(!q.empty())
{
int v = q.front();
q.pop();
for(auto u : adj[v])
if(d[k][u] > d[k][v] + 1)
{
d[k][u] = d[k][v] + 1;
q.push(u);
}
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n , m;
cin >> n >> m;
int a , b , s , t;
cin >> s >> t >> a >> b;
s-- , t-- , a-- , b--;
for(int i = 0; i < m; i++)
{
int a , b;
cin >> a >> b;
a-- , b--;
adj[a].pb(b);
adj[b].pb(a);
}
bfs(a , 0) , bfs(b , 1) , bfs(t , 2);
if(d[0][s] > d[0][t] || d[1][s] > d[1][t])
return cout << -1 << endl , 0;
vector<pair<int , int> > tmp;
for(int i = 0; i < n; i++)
tmp.pb({d[0][i] , i});
sort(tmp.begin() , tmp.end());
memset(x , -1 , sizeof x);
for(auto sht : tmp)
{
int v = sht.second;
x[v] = 0;
for(auto u : adj[v])
if(d[0][u] + 1 == d[0][v] && d[1][u] + 1 == d[1][v])
x[v] = max(x[v] , x[u] + 1);
}
int res = 1e9;
for(int t = 0; t < n; t++)
{
if(d[0][s] > d[0][t] || d[1][s] > d[1][t])
res = min(res , d[2][t]);
else if(d[0][s] == d[0][t] && d[1][s] == d[1][t] && x[t] > x[s])
res = min(res , d[2][t]);
}
cout << res - 1 << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
8192 KB |
Output is correct |
| 2 |
Correct |
9 ms |
8192 KB |
Output is correct |
| 3 |
Correct |
11 ms |
8192 KB |
Output is correct |
| 4 |
Correct |
9 ms |
8192 KB |
Output is correct |
| 5 |
Correct |
8 ms |
8192 KB |
Output is correct |
| 6 |
Correct |
2 ms |
8192 KB |
Output is correct |
| 7 |
Correct |
9 ms |
8192 KB |
Output is correct |
| 8 |
Correct |
9 ms |
8192 KB |
Output is correct |
| 9 |
Correct |
8 ms |
8192 KB |
Output is correct |
| 10 |
Correct |
8 ms |
8192 KB |
Output is correct |
| 11 |
Correct |
10 ms |
8192 KB |
Output is correct |
| 12 |
Correct |
10 ms |
8192 KB |
Output is correct |
| 13 |
Correct |
10 ms |
8320 KB |
Output is correct |
| 14 |
Correct |
10 ms |
8192 KB |
Output is correct |
| 15 |
Correct |
11 ms |
8192 KB |
Output is correct |
| 16 |
Correct |
11 ms |
8192 KB |
Output is correct |
| 17 |
Correct |
11 ms |
8192 KB |
Output is correct |
| 18 |
Correct |
12 ms |
8192 KB |
Output is correct |
| 19 |
Correct |
11 ms |
8192 KB |
Output is correct |
| 20 |
Correct |
11 ms |
8228 KB |
Output is correct |
| 21 |
Correct |
9 ms |
8192 KB |
Output is correct |
| 22 |
Correct |
11 ms |
8192 KB |
Output is correct |
| 23 |
Correct |
9 ms |
8192 KB |
Output is correct |
| 24 |
Correct |
10 ms |
8192 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
42 ms |
9848 KB |
Output is correct |
| 2 |
Correct |
69 ms |
10588 KB |
Output is correct |
| 3 |
Correct |
49 ms |
9972 KB |
Output is correct |
| 4 |
Correct |
56 ms |
10736 KB |
Output is correct |
| 5 |
Correct |
38 ms |
9844 KB |
Output is correct |
| 6 |
Correct |
39 ms |
10064 KB |
Output is correct |
| 7 |
Correct |
44 ms |
10224 KB |
Output is correct |
| 8 |
Correct |
40 ms |
10224 KB |
Output is correct |
| 9 |
Correct |
59 ms |
10608 KB |
Output is correct |
| 10 |
Correct |
182 ms |
15028 KB |
Output is correct |
| 11 |
Correct |
79 ms |
12012 KB |
Output is correct |
| 12 |
Correct |
139 ms |
12880 KB |
Output is correct |
| 13 |
Correct |
98 ms |
12140 KB |
Output is correct |
| 14 |
Correct |
64 ms |
9948 KB |
Output is correct |
| 15 |
Correct |
108 ms |
12880 KB |
Output is correct |
| 16 |
Correct |
142 ms |
13024 KB |
Output is correct |
| 17 |
Correct |
113 ms |
12528 KB |
Output is correct |
| 18 |
Correct |
114 ms |
12656 KB |
Output is correct |
| 19 |
Correct |
184 ms |
13804 KB |
Output is correct |
| 20 |
Correct |
281 ms |
16620 KB |
Output is correct |
| 21 |
Correct |
165 ms |
14704 KB |
Output is correct |
| 22 |
Correct |
160 ms |
13936 KB |
Output is correct |
| 23 |
Correct |
169 ms |
14532 KB |
Output is correct |
| 24 |
Correct |
183 ms |
14576 KB |
Output is correct |
| 25 |
Correct |
222 ms |
14196 KB |
Output is correct |
| 26 |
Correct |
142 ms |
14064 KB |
Output is correct |
| 27 |
Correct |
166 ms |
14572 KB |
Output is correct |
| 28 |
Correct |
169 ms |
14576 KB |
Output is correct |
| 29 |
Correct |
193 ms |
15344 KB |
Output is correct |
| 30 |
Correct |
314 ms |
17312 KB |
Output is correct |
| 31 |
Correct |
188 ms |
15584 KB |
Output is correct |
| 32 |
Correct |
223 ms |
14568 KB |
Output is correct |
| 33 |
Correct |
174 ms |
14756 KB |
Output is correct |
| 34 |
Correct |
230 ms |
15088 KB |
Output is correct |
| 35 |
Correct |
226 ms |
14804 KB |
Output is correct |
| 36 |
Correct |
186 ms |
15076 KB |
Output is correct |
| 37 |
Correct |
219 ms |
15924 KB |
Output is correct |
| 38 |
Correct |
233 ms |
15688 KB |
Output is correct |
| 39 |
Correct |
240 ms |
15852 KB |
Output is correct |
| 40 |
Correct |
266 ms |
17556 KB |
Output is correct |
| 41 |
Correct |
403 ms |
19556 KB |
Output is correct |
