| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 85970 |
2018-11-23T14:29:51 Z |
wolfris |
Pipes (BOI13_pipes) |
C++14 |
|
394 ms |
33776 KB |
#include <iostream>
#include <stdio.h>
#include <vector>
#include <queue>
using namespace std;
int n, m, c[100015], adjcnt[100015], p[500000], ncycle, sum, oper = 1;
vector <pair <int, int>> a[100015];
pair <int, int> trace[100015];
bool trim_graph() {
queue <int> q;
for (int u = 1; u <= n; ++u)
if (adjcnt[u] == 1)
q.push(u);
while (!q.empty()) {
int u = q.front(); q.pop();
--ncycle;
for (auto e: a[u])
if (adjcnt[e.first]) {
int v = e.first;
--adjcnt[u]; --adjcnt[v];
p[e.second] = 2 * c[u];
c[v] -= c[u];
if (ncycle == 1 && c[v])
return false;
if (adjcnt[v] == 1)
q.push(v);
}
}
return true;
}
void dfs(int u) {
sum += c[u] * oper; oper = -oper;
for (auto e: a[u])
if (adjcnt[e.first] == 2) {
int v = e.first;
--adjcnt[u]; --adjcnt[v],
trace[u] = e; dfs(v);
return;
}
for (auto e: a[u])
if (adjcnt[e.first] == 1) {
int v = e.first;
p[e.second] = sum;
c[u] -= sum / 2;
c[v] -= sum / 2;
return;
}
}
int main() {
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> m;
for (int u = 1; u <= n; ++u)
cin >> c[u];
for (int i = 0, u, v; i < m; ++i)
cin >> u >> v,
a[u].push_back({v, i}),
a[v].push_back({u, i}),
++adjcnt[u], ++adjcnt[v];
if (m > n) goto NO;
ncycle = n;
if (!trim_graph()) goto NO;
if (m == n) {
if (ncycle % 2 == 0) goto NO;
int u;
for (u = 1; u <= n; ++u)
if (adjcnt[u] == 2) {
dfs(u); break;
}
for (; trace[u].first; u = trace[u].first)
p[trace[u].second] = 2 * c[u],
c[trace[u].first] -= c[u];
}
for (int i = 0; i < m; ++i)
cout << p[i] << '\n';
return 0;
NO: cout << 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 2 |
Correct |
4 ms |
2856 KB |
Output is correct |
| 3 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 4 |
Correct |
71 ms |
9796 KB |
Output is correct |
| 5 |
Correct |
4 ms |
9796 KB |
Output is correct |
| 6 |
Correct |
4 ms |
9796 KB |
Output is correct |
| 7 |
Correct |
4 ms |
9796 KB |
Output is correct |
| 8 |
Correct |
4 ms |
9796 KB |
Output is correct |
| 9 |
Correct |
5 ms |
9796 KB |
Output is correct |
| 10 |
Correct |
5 ms |
9796 KB |
Output is correct |
| 11 |
Correct |
4 ms |
9796 KB |
Output is correct |
| 12 |
Correct |
4 ms |
9796 KB |
Output is correct |
| 13 |
Correct |
60 ms |
10188 KB |
Output is correct |
| 14 |
Correct |
63 ms |
12540 KB |
Output is correct |
| 15 |
Correct |
70 ms |
14432 KB |
Output is correct |
| 16 |
Correct |
61 ms |
14980 KB |
Output is correct |
| 17 |
Correct |
64 ms |
17196 KB |
Output is correct |
| 18 |
Correct |
76 ms |
18440 KB |
Output is correct |
| 19 |
Correct |
66 ms |
18440 KB |
Output is correct |
| 20 |
Correct |
4 ms |
18440 KB |
Output is correct |
| 21 |
Correct |
6 ms |
18440 KB |
Output is correct |
| 22 |
Correct |
78 ms |
18468 KB |
Output is correct |
| 23 |
Correct |
53 ms |
18468 KB |
Output is correct |
| 24 |
Correct |
84 ms |
18608 KB |
Output is correct |
| 25 |
Correct |
71 ms |
18608 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
18608 KB |
Output is correct |
| 2 |
Correct |
4 ms |
18608 KB |
Output is correct |
| 3 |
Correct |
55 ms |
18608 KB |
Output is correct |
| 4 |
Correct |
53 ms |
18608 KB |
Output is correct |
| 5 |
Correct |
53 ms |
18608 KB |
Output is correct |
| 6 |
Correct |
220 ms |
27900 KB |
Output is correct |
| 7 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 8 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 9 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 10 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 11 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 12 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 13 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 14 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 15 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 16 |
Correct |
5 ms |
27900 KB |
Output is correct |
| 17 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 18 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 19 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 20 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 21 |
Correct |
5 ms |
27900 KB |
Output is correct |
| 22 |
Correct |
4 ms |
27900 KB |
Output is correct |
| 23 |
Correct |
66 ms |
27900 KB |
Output is correct |
| 24 |
Correct |
70 ms |
27900 KB |
Output is correct |
| 25 |
Correct |
57 ms |
27900 KB |
Output is correct |
| 26 |
Correct |
55 ms |
27900 KB |
Output is correct |
| 27 |
Correct |
54 ms |
27900 KB |
Output is correct |
| 28 |
Correct |
58 ms |
27900 KB |
Output is correct |
| 29 |
Correct |
172 ms |
27900 KB |
Output is correct |
| 30 |
Correct |
67 ms |
27900 KB |
Output is correct |
| 31 |
Correct |
72 ms |
27900 KB |
Output is correct |
| 32 |
Correct |
71 ms |
27900 KB |
Output is correct |
| 33 |
Correct |
55 ms |
27900 KB |
Output is correct |
| 34 |
Correct |
52 ms |
27900 KB |
Output is correct |
| 35 |
Correct |
67 ms |
27900 KB |
Output is correct |
| 36 |
Correct |
54 ms |
27900 KB |
Output is correct |
| 37 |
Correct |
219 ms |
33440 KB |
Output is correct |
| 38 |
Correct |
69 ms |
33440 KB |
Output is correct |
| 39 |
Correct |
89 ms |
33440 KB |
Output is correct |
| 40 |
Correct |
69 ms |
33440 KB |
Output is correct |
| 41 |
Correct |
55 ms |
33440 KB |
Output is correct |
| 42 |
Correct |
64 ms |
33440 KB |
Output is correct |
| 43 |
Correct |
58 ms |
33440 KB |
Output is correct |
| 44 |
Correct |
53 ms |
33440 KB |
Output is correct |
| 45 |
Correct |
176 ms |
33720 KB |
Output is correct |
| 46 |
Correct |
74 ms |
33720 KB |
Output is correct |
| 47 |
Correct |
76 ms |
33720 KB |
Output is correct |
| 48 |
Correct |
82 ms |
33720 KB |
Output is correct |
| 49 |
Correct |
83 ms |
33720 KB |
Output is correct |
| 50 |
Correct |
66 ms |
33720 KB |
Output is correct |
| 51 |
Correct |
59 ms |
33720 KB |
Output is correct |
| 52 |
Correct |
92 ms |
33720 KB |
Output is correct |
| 53 |
Correct |
394 ms |
33776 KB |
Output is correct |
| 54 |
Correct |
96 ms |
33776 KB |
Output is correct |
