| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 246194 |
2020-07-08T10:49:01 Z |
mieszko11b |
007 (CEOI14_007) |
C++14 |
|
331 ms |
18356 KB |
#include <bits/stdc++.h>
using namespace std;
int n, m;
int s, d, a, b;
vector<int> G[200007];
int dista[200007], distb[200007], dists[200007], distd[200007];
bool vis[200007];
void run_bfs(int w, int *dist) {
memset(vis, 0, sizeof vis);
vis[w] = 1;
dist[w] = 0;
queue<int> Q;
Q.push(w);
while(!Q.empty()) {
int u= Q.front();
Q.pop();
for(int v : G[u]) {
if(!vis[v]) {
vis[v] = 1;
dist[v] = dist[u] + 1;
Q.push(v);
}
}
}
}
int main() {
scanf("%d%d%d%d%d%d", &n, &m, &s, &d, &a, &b);
while(m--) {
int a, b;
scanf("%d%d", &a, &b);
G[a].push_back(b);
G[b].push_back(a);
}
run_bfs(s, dists);
run_bfs(d, distd);
run_bfs(a, dista);
run_bfs(b, distb);
int sa = dists[a], sb = dists[b];
int da = distd[a], db = distd[b];
if(sa != sb || da != db) {
int val = min(da - sa, db - sb);
if(val < 0) val = -1;
printf("%d\n", val);
} else {
int fs = 0, fd = 0;
for(int i = 1 ; i <= n ; i++) {
if(dists[i] + dista[i] == sa && dists[i] + distb[i] == sb)
fs = max(fs, dists[i]);
if(distd[i] + dista[i] == da && distd[i] + distb[i] == db)
fd = max(fd, distd[i]);
}
int val = min(da - sa, db - sb);
if(sa - fs > da - fd)
val--;
if(val < 0) val = -1;
printf("%d\n", val);
}
return 0;
}
Compilation message
007.cpp: In function 'int main()':
007.cpp:33:7: 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, &s, &d, &a, &b);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:36:8: 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 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 2 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 3 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 4 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 5 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 6 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 7 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 8 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 9 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 10 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 11 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 12 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 13 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 14 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 15 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 16 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 17 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 18 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 19 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 20 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 21 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 22 |
Correct |
8 ms |
5248 KB |
Output is correct |
| 23 |
Correct |
7 ms |
5248 KB |
Output is correct |
| 24 |
Correct |
8 ms |
5248 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
33 ms |
7596 KB |
Output is correct |
| 2 |
Correct |
41 ms |
8440 KB |
Output is correct |
| 3 |
Correct |
34 ms |
7672 KB |
Output is correct |
| 4 |
Correct |
55 ms |
8440 KB |
Output is correct |
| 5 |
Correct |
32 ms |
7416 KB |
Output is correct |
| 6 |
Correct |
32 ms |
7800 KB |
Output is correct |
| 7 |
Correct |
37 ms |
7928 KB |
Output is correct |
| 8 |
Correct |
38 ms |
7928 KB |
Output is correct |
| 9 |
Correct |
52 ms |
8312 KB |
Output is correct |
| 10 |
Correct |
182 ms |
12664 KB |
Output is correct |
| 11 |
Correct |
76 ms |
9848 KB |
Output is correct |
| 12 |
Correct |
99 ms |
10872 KB |
Output is correct |
| 13 |
Correct |
77 ms |
10232 KB |
Output is correct |
| 14 |
Correct |
62 ms |
9464 KB |
Output is correct |
| 15 |
Correct |
94 ms |
11000 KB |
Output is correct |
| 16 |
Correct |
96 ms |
11384 KB |
Output is correct |
| 17 |
Correct |
98 ms |
10744 KB |
Output is correct |
| 18 |
Correct |
90 ms |
10744 KB |
Output is correct |
| 19 |
Correct |
156 ms |
12024 KB |
Output is correct |
| 20 |
Correct |
247 ms |
14840 KB |
Output is correct |
| 21 |
Correct |
152 ms |
13304 KB |
Output is correct |
| 22 |
Correct |
127 ms |
12176 KB |
Output is correct |
| 23 |
Correct |
170 ms |
13048 KB |
Output is correct |
| 24 |
Correct |
123 ms |
12912 KB |
Output is correct |
| 25 |
Correct |
133 ms |
12664 KB |
Output is correct |
| 26 |
Correct |
109 ms |
12280 KB |
Output is correct |
| 27 |
Correct |
139 ms |
13176 KB |
Output is correct |
| 28 |
Correct |
157 ms |
13176 KB |
Output is correct |
| 29 |
Correct |
182 ms |
13688 KB |
Output is correct |
| 30 |
Correct |
248 ms |
15480 KB |
Output is correct |
| 31 |
Correct |
158 ms |
14328 KB |
Output is correct |
| 32 |
Correct |
184 ms |
13176 KB |
Output is correct |
| 33 |
Correct |
189 ms |
13432 KB |
Output is correct |
| 34 |
Correct |
171 ms |
13692 KB |
Output is correct |
| 35 |
Correct |
135 ms |
13432 KB |
Output is correct |
| 36 |
Correct |
137 ms |
13688 KB |
Output is correct |
| 37 |
Correct |
183 ms |
14756 KB |
Output is correct |
| 38 |
Correct |
197 ms |
14584 KB |
Output is correct |
| 39 |
Correct |
251 ms |
14552 KB |
Output is correct |
| 40 |
Correct |
241 ms |
16120 KB |
Output is correct |
| 41 |
Correct |
331 ms |
18356 KB |
Output is correct |
