#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define int long long
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
const int mxN = (int)1e5+10;
const int LINF = (int)1e18;
int n, m, x, y;
vector<int> adj[mxN];
int a[mxN], b[mxN], c[mxN], node[mxN];
bool bad[20][20];
bool dfs(int s, int t, int v, int p){
if(s==t) return true;
for(auto u : adj[s]){
if(u==p) continue;
if(dfs(u,t,v,s)){ node[u]+=v; return 1; }
}
return 0;
}
void add(int s, int t, int v){
// this can be done in O(logN) or O(1) with sparse tables...
node[s]+=v; dfs(s,t,v,-1);
}
int32_t main()
{
ios_base::sync_with_stdio(false); cin.tie(0);
cin >> n; int ans = 0;
for(int i = 1; i < n; i++){
int x, y; cin >> x >> y;
adj[x].pb(y), adj[y].pb(x);
}
cin >> m;
for(int i = 0; i < m; i++) cin >> a[i] >> b[i] >> c[i];
for(int i = 0; i < m; i++){
for(int j = i+1; j < m; j++){
add(a[i],b[i],1), add(a[j],b[j],1);
bad[i][j]=bad[j][i]=(*max_element(node+1,node+n+1)>=2);
add(a[i],b[i],-1), add(a[j],b[j],-1);
}
}
for(int mask = 1; mask < (1<<m); mask++){
vector<int> v; v.clear(); bool ok = 0;
for(int i = 0; i < m; i++) if((mask>>i)&1) v.pb(i);
for(int i = 0; i < sz(v); i++)
for(int j = i+1; j < sz(v); j++)
ok|=bad[v[i]][v[j]];
if(ok) continue; int sum = 0;
for(auto u : v) sum+=c[u];
ans = max(ans, sum);
}
cout << ans;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2676 KB |
Output is correct |
4 |
Correct |
12 ms |
2760 KB |
Output is correct |
5 |
Correct |
427 ms |
8328 KB |
Output is correct |
6 |
Correct |
84 ms |
9164 KB |
Output is correct |
7 |
Correct |
382 ms |
11884 KB |
Output is correct |
8 |
Correct |
428 ms |
8048 KB |
Output is correct |
9 |
Correct |
878 ms |
13208 KB |
Output is correct |
10 |
Correct |
334 ms |
8144 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Incorrect |
2 ms |
2644 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Incorrect |
2 ms |
2644 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1047 ms |
9696 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2676 KB |
Output is correct |
4 |
Correct |
12 ms |
2760 KB |
Output is correct |
5 |
Correct |
427 ms |
8328 KB |
Output is correct |
6 |
Correct |
84 ms |
9164 KB |
Output is correct |
7 |
Correct |
382 ms |
11884 KB |
Output is correct |
8 |
Correct |
428 ms |
8048 KB |
Output is correct |
9 |
Correct |
878 ms |
13208 KB |
Output is correct |
10 |
Correct |
334 ms |
8144 KB |
Output is correct |
11 |
Execution timed out |
1068 ms |
2772 KB |
Time limit exceeded |
12 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2644 KB |
Output is correct |
2 |
Correct |
2 ms |
2644 KB |
Output is correct |
3 |
Correct |
2 ms |
2676 KB |
Output is correct |
4 |
Correct |
12 ms |
2760 KB |
Output is correct |
5 |
Correct |
427 ms |
8328 KB |
Output is correct |
6 |
Correct |
84 ms |
9164 KB |
Output is correct |
7 |
Correct |
382 ms |
11884 KB |
Output is correct |
8 |
Correct |
428 ms |
8048 KB |
Output is correct |
9 |
Correct |
878 ms |
13208 KB |
Output is correct |
10 |
Correct |
334 ms |
8144 KB |
Output is correct |
11 |
Correct |
2 ms |
2644 KB |
Output is correct |
12 |
Incorrect |
2 ms |
2644 KB |
Output isn't correct |
13 |
Halted |
0 ms |
0 KB |
- |