#include<bits/stdc++.h>
using namespace std;
const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
const int maxn = 5e5+10;
int n, m, c[maxn], ans[maxn], gr[maxn];
vector<pair<int,int>> g[maxn];
void solve() {
cin >> n >> m;
if(m != n-1) {
assert(m > n-1);
cout << 0 << endl;
return;
}
for(int i = 1; i <= n; i++) {
cin >> c[i];
}
if(n == 2) {
cout << 2*c[1] << endl;
return;
}
for(int i = 1; i <= m; i++) {
int u,v; cin >> u >> v;
g[u].pb(mp(v,i));
g[v].pb(mp(u,i));
gr[u]++;
gr[v]++;
}
queue<int> q;
for(int i = 1; i <= n; i++) {
if(gr[i] == 1) q.push(i);
}
while(q.size()) {
int u = q.front(); q.pop();
gr[u] = -1;
for(auto V : g[u]) {
int v = V.fr;
int id = V.sc;
if(gr[v] == -1) continue;
ans[id] = 2*c[u];
c[v]-= c[u];
if(--gr[v] == 1) q.push(v);
}
}
for(int i = 1; i <= m; i++) {
cout << ans[i] << endl;
}
}
int32_t main() {
ios::sync_with_stdio(false); cin.tie(0);
// freopen("in.in", "r", stdin);
// freopen("out.out", "w", stdout);
int tt = 1;
// cin >> tt;
while(tt--) {
solve();
}
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 2 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 3 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 4 |
Correct |
63 ms |
20356 KB |
Output is correct |
| 5 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 6 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 7 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 8 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 9 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 10 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 11 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 12 |
Correct |
6 ms |
12176 KB |
Output is correct |
| 13 |
Correct |
45 ms |
18676 KB |
Output is correct |
| 14 |
Correct |
56 ms |
19848 KB |
Output is correct |
| 15 |
Correct |
58 ms |
20444 KB |
Output is correct |
| 16 |
Correct |
51 ms |
19024 KB |
Output is correct |
| 17 |
Correct |
59 ms |
20332 KB |
Output is correct |
| 18 |
Correct |
58 ms |
20392 KB |
Output is correct |
| 19 |
Correct |
61 ms |
20044 KB |
Output is correct |
| 20 |
Correct |
6 ms |
12088 KB |
Output is correct |
| 21 |
Correct |
6 ms |
12116 KB |
Output is correct |
| 22 |
Correct |
58 ms |
20360 KB |
Output is correct |
| 23 |
Correct |
49 ms |
18608 KB |
Output is correct |
| 24 |
Correct |
66 ms |
20428 KB |
Output is correct |
| 25 |
Correct |
48 ms |
18932 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 2 |
Incorrect |
6 ms |
12072 KB |
Output isn't correct |
| 3 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 4 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 5 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 6 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 7 |
Incorrect |
7 ms |
11988 KB |
Output isn't correct |
| 8 |
Incorrect |
7 ms |
11988 KB |
Output isn't correct |
| 9 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 10 |
Correct |
7 ms |
12052 KB |
Output is correct |
| 11 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 12 |
Correct |
7 ms |
11992 KB |
Output is correct |
| 13 |
Correct |
6 ms |
12068 KB |
Output is correct |
| 14 |
Incorrect |
7 ms |
12040 KB |
Output isn't correct |
| 15 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 16 |
Incorrect |
6 ms |
12048 KB |
Output isn't correct |
| 17 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 18 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 19 |
Correct |
6 ms |
11956 KB |
Output is correct |
| 20 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 21 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 22 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 23 |
Incorrect |
6 ms |
12064 KB |
Output isn't correct |
| 24 |
Incorrect |
7 ms |
11988 KB |
Output isn't correct |
| 25 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 26 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 27 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 28 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 29 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 30 |
Incorrect |
7 ms |
12060 KB |
Output isn't correct |
| 31 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 32 |
Incorrect |
7 ms |
11980 KB |
Output isn't correct |
| 33 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 34 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 35 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 36 |
Correct |
6 ms |
12004 KB |
Output is correct |
| 37 |
Correct |
6 ms |
12076 KB |
Output is correct |
| 38 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 39 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 40 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 41 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 42 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 43 |
Correct |
6 ms |
12076 KB |
Output is correct |
| 44 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 45 |
Correct |
6 ms |
12020 KB |
Output is correct |
| 46 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 47 |
Incorrect |
6 ms |
12052 KB |
Output isn't correct |
| 48 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
| 49 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 50 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 51 |
Correct |
7 ms |
11988 KB |
Output is correct |
| 52 |
Correct |
6 ms |
11988 KB |
Output is correct |
| 53 |
Correct |
6 ms |
12000 KB |
Output is correct |
| 54 |
Incorrect |
6 ms |
11988 KB |
Output isn't correct |
