#include <bits/stdc++.h>
#define ll long long
#define rep(i, n, m) for (ll i = n; i <= m; i ++)
#define rrep(i, n, m) for (ll i = n; i >= m; i --)
using namespace std;
const long long N = 2e5 + 5;
struct edge {
int u, v;
ll val;
int other(int x) {
return u ^ v ^ x;
}
} E[3 * N];
vector <int> d[N];
ll a[N], deg[N], n, m;
bool vis[N];
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin >> n >> m;
rep(i, 1, n) cin >> a[i];
rep(i, 1, m) {
cin >> E[i].u >> E[i].v;
d[E[i].u].push_back(i);
d[E[i].v].push_back(i);
deg[E[i].u] ++; deg[E[i].v] ++;
E[i].val = 0;
}
int lef = n;
queue <int> q;
rep(i, 1, n) if (d[i].size() == 1)
q.push(i), deg[i] = 0, vis[i] = true;
if (n == 2) {
if (a[1] == a[2]) {
cout << 2 * a[1] << '\n';
return 0;
} else {
cout << 0 << '\n';
return 0;
}
}
int lst = -1;
while (q.size()) {
int u = q.front(); q.pop();
lst = u;
lef --;
vis[u] = true;
for (int i: d[u]) {
int v = E[i].other(u);
if (vis[v]) continue;
E[i].val += 2 * a[u];
a[v] -= a[u];
-- deg[v];
if (deg[v] == 1 || (lef == 1 && deg[v] == 0)) {
q.push(v);
}
}
}
if (a[lst])
cout << 0 << '\n';
else
rep(i, 1, m) cout << E[i].val << '\n';
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
5040 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
5 ms |
5076 KB |
Output is correct |
| 4 |
Correct |
85 ms |
13744 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 6 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5052 KB |
Output is correct |
| 10 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 11 |
Correct |
4 ms |
5040 KB |
Output is correct |
| 12 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 13 |
Correct |
59 ms |
11820 KB |
Output is correct |
| 14 |
Correct |
72 ms |
13124 KB |
Output is correct |
| 15 |
Correct |
65 ms |
13736 KB |
Output is correct |
| 16 |
Correct |
49 ms |
12328 KB |
Output is correct |
| 17 |
Correct |
69 ms |
13628 KB |
Output is correct |
| 18 |
Correct |
72 ms |
13736 KB |
Output is correct |
| 19 |
Correct |
64 ms |
13360 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 21 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 22 |
Correct |
73 ms |
13708 KB |
Output is correct |
| 23 |
Correct |
65 ms |
11812 KB |
Output is correct |
| 24 |
Correct |
79 ms |
13688 KB |
Output is correct |
| 25 |
Correct |
60 ms |
12192 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
3 ms |
5036 KB |
Output isn't correct |
| 2 |
Incorrect |
3 ms |
5044 KB |
Output isn't correct |
| 3 |
Correct |
54 ms |
12584 KB |
Output is correct |
| 4 |
Correct |
69 ms |
12984 KB |
Output is correct |
| 5 |
Correct |
76 ms |
13012 KB |
Output is correct |
| 6 |
Correct |
223 ms |
28600 KB |
Output is correct |
| 7 |
Incorrect |
3 ms |
5032 KB |
Output isn't correct |
| 8 |
Incorrect |
4 ms |
4948 KB |
Output isn't correct |
| 9 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5028 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5028 KB |
Output is correct |
| 14 |
Incorrect |
4 ms |
4948 KB |
Output isn't correct |
| 15 |
Incorrect |
3 ms |
5076 KB |
Output isn't correct |
| 16 |
Incorrect |
4 ms |
5040 KB |
Output isn't correct |
| 17 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 18 |
Correct |
5 ms |
5080 KB |
Output is correct |
| 19 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5048 KB |
Output is correct |
| 21 |
Correct |
4 ms |
5108 KB |
Output is correct |
| 22 |
Incorrect |
3 ms |
5044 KB |
Output isn't correct |
| 23 |
Incorrect |
54 ms |
11520 KB |
Output isn't correct |
| 24 |
Incorrect |
53 ms |
13116 KB |
Output isn't correct |
| 25 |
Correct |
73 ms |
12596 KB |
Output is correct |
| 26 |
Correct |
65 ms |
13060 KB |
Output is correct |
| 27 |
Correct |
67 ms |
12888 KB |
Output is correct |
| 28 |
Correct |
61 ms |
13260 KB |
Output is correct |
| 29 |
Correct |
175 ms |
24544 KB |
Output is correct |
| 30 |
Incorrect |
58 ms |
12728 KB |
Output isn't correct |
| 31 |
Incorrect |
62 ms |
13004 KB |
Output isn't correct |
| 32 |
Incorrect |
72 ms |
13124 KB |
Output isn't correct |
| 33 |
Correct |
47 ms |
13044 KB |
Output is correct |
| 34 |
Correct |
49 ms |
13028 KB |
Output is correct |
| 35 |
Correct |
56 ms |
13004 KB |
Output is correct |
| 36 |
Correct |
84 ms |
13144 KB |
Output is correct |
| 37 |
Correct |
194 ms |
28468 KB |
Output is correct |
| 38 |
Incorrect |
60 ms |
13036 KB |
Output isn't correct |
| 39 |
Incorrect |
54 ms |
13188 KB |
Output isn't correct |
| 40 |
Incorrect |
67 ms |
13104 KB |
Output isn't correct |
| 41 |
Correct |
58 ms |
12880 KB |
Output is correct |
| 42 |
Correct |
59 ms |
12848 KB |
Output is correct |
| 43 |
Correct |
48 ms |
12972 KB |
Output is correct |
| 44 |
Correct |
64 ms |
13000 KB |
Output is correct |
| 45 |
Incorrect |
156 ms |
25540 KB |
Output isn't correct |
| 46 |
Incorrect |
78 ms |
12960 KB |
Output isn't correct |
| 47 |
Incorrect |
57 ms |
13104 KB |
Output isn't correct |
| 48 |
Incorrect |
56 ms |
12952 KB |
Output isn't correct |
| 49 |
Correct |
54 ms |
12784 KB |
Output is correct |
| 50 |
Correct |
52 ms |
13028 KB |
Output is correct |
| 51 |
Correct |
67 ms |
13100 KB |
Output is correct |
| 52 |
Correct |
54 ms |
12912 KB |
Output is correct |
| 53 |
Incorrect |
175 ms |
26268 KB |
Output isn't correct |
| 54 |
Incorrect |
74 ms |
12860 KB |
Output isn't correct |
