# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
338105 | 2020-12-22T13:53:57 Z | ogibogi2004 | 구슬과 끈 (APIO14_beads) | C++14 | 1000 ms | 5484 KB |
#include<bits/stdc++.h> using namespace std; #define ll long long const ll MAXN=2e5+6; const ll INF=2e15; ll dp[MAXN][2]; ll par[MAXN]; vector<pair<ll,ll> >g[MAXN]; void dfs(ll u,ll p) { par[u]=p; vector<pair<pair<ll,ll>,ll> >ch; for(auto v:g[u]) { if(v.first==p)continue; dfs(v.first,u); ch.push_back({{dp[v.first][0],dp[v.first][1]},v.second}); } dp[u][1]=-INF; for(ll i=0;i<ch.size();i++) { dp[u][0]+=max(ch[i].first.first,ch[i].first.second+ch[i].second); } for(ll i=0;i<ch.size();i++) { dp[u][1]=max(dp[u][1],dp[u][0]-max(ch[i].first.first,ch[i].first.second+ch[i].second)+ch[i].first.first+ch[i].second); } } int main() { ll n; cin>>n; for(ll i=1;i<n;i++) { ll x,y,z; cin>>x>>y>>z; g[x].push_back({y,z}); g[y].push_back({x,z}); } ll ans=0; for(ll i=1;i<=n;i++) { for(ll j=1;j<=n;j++) { dp[j][0]=0; dp[j][1]=-INF; } dfs(i,0); //cout<<i<<" "<<dp[i][0]<<endl; ans=max(ans,dp[i][0]); } cout<<ans<<endl; return 0; } /* 10 4 10 2 1 2 21 1 3 13 6 7 1 7 9 5 2 4 3 2 5 8 1 6 55 6 8 34 */
Compilation message
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 4 ms | 4972 KB | Output is correct |
2 | Correct | 4 ms | 4972 KB | Output is correct |
3 | Correct | 4 ms | 4972 KB | Output is correct |
4 | Correct | 4 ms | 4972 KB | Output is correct |
5 | Correct | 4 ms | 4972 KB | Output is correct |
6 | Correct | 4 ms | 4992 KB | Output is correct |
7 | Correct | 4 ms | 4972 KB | Output is correct |
8 | Correct | 4 ms | 4972 KB | Output is correct |
9 | Correct | 4 ms | 4972 KB | Output is correct |
10 | Correct | 4 ms | 4972 KB | Output is correct |
11 | Correct | 4 ms | 4972 KB | Output is correct |
12 | Correct | 4 ms | 4972 KB | Output is correct |
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 4 ms | 4972 KB | Output is correct |
2 | Correct | 4 ms | 4972 KB | Output is correct |
3 | Correct | 4 ms | 4972 KB | Output is correct |
4 | Correct | 4 ms | 4972 KB | Output is correct |
5 | Correct | 4 ms | 4972 KB | Output is correct |
6 | Correct | 4 ms | 4992 KB | Output is correct |
7 | Correct | 4 ms | 4972 KB | Output is correct |
8 | Correct | 4 ms | 4972 KB | Output is correct |
9 | Correct | 4 ms | 4972 KB | Output is correct |
10 | Correct | 4 ms | 4972 KB | Output is correct |
11 | Correct | 4 ms | 4972 KB | Output is correct |
12 | Correct | 4 ms | 4972 KB | Output is correct |
13 | Correct | 4 ms | 5100 KB | Output is correct |
14 | Correct | 4 ms | 5100 KB | Output is correct |
15 | Correct | 4 ms | 5100 KB | Output is correct |
16 | Correct | 6 ms | 5100 KB | Output is correct |
17 | Correct | 6 ms | 5100 KB | Output is correct |
18 | Correct | 6 ms | 5100 KB | Output is correct |
19 | Correct | 5 ms | 5100 KB | Output is correct |
20 | Correct | 5 ms | 5100 KB | Output is correct |
21 | Correct | 5 ms | 5100 KB | Output is correct |
22 | Correct | 6 ms | 5100 KB | Output is correct |
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 4 ms | 4972 KB | Output is correct |
2 | Correct | 4 ms | 4972 KB | Output is correct |
3 | Correct | 4 ms | 4972 KB | Output is correct |
4 | Correct | 4 ms | 4972 KB | Output is correct |
5 | Correct | 4 ms | 4972 KB | Output is correct |
6 | Correct | 4 ms | 4992 KB | Output is correct |
7 | Correct | 4 ms | 4972 KB | Output is correct |
8 | Correct | 4 ms | 4972 KB | Output is correct |
9 | Correct | 4 ms | 4972 KB | Output is correct |
10 | Correct | 4 ms | 4972 KB | Output is correct |
11 | Correct | 4 ms | 4972 KB | Output is correct |
12 | Correct | 4 ms | 4972 KB | Output is correct |
13 | Correct | 4 ms | 5100 KB | Output is correct |
14 | Correct | 4 ms | 5100 KB | Output is correct |
15 | Correct | 4 ms | 5100 KB | Output is correct |
16 | Correct | 6 ms | 5100 KB | Output is correct |
17 | Correct | 6 ms | 5100 KB | Output is correct |
18 | Correct | 6 ms | 5100 KB | Output is correct |
19 | Correct | 5 ms | 5100 KB | Output is correct |
20 | Correct | 5 ms | 5100 KB | Output is correct |
21 | Correct | 5 ms | 5100 KB | Output is correct |
22 | Correct | 6 ms | 5100 KB | Output is correct |
23 | Execution timed out | 1096 ms | 5484 KB | Time limit exceeded |
24 | Halted | 0 ms | 0 KB | - |
# | 결과 | 실행 시간 | 메모리 | Grader output |
---|---|---|---|---|
1 | Correct | 4 ms | 4972 KB | Output is correct |
2 | Correct | 4 ms | 4972 KB | Output is correct |
3 | Correct | 4 ms | 4972 KB | Output is correct |
4 | Correct | 4 ms | 4972 KB | Output is correct |
5 | Correct | 4 ms | 4972 KB | Output is correct |
6 | Correct | 4 ms | 4992 KB | Output is correct |
7 | Correct | 4 ms | 4972 KB | Output is correct |
8 | Correct | 4 ms | 4972 KB | Output is correct |
9 | Correct | 4 ms | 4972 KB | Output is correct |
10 | Correct | 4 ms | 4972 KB | Output is correct |
11 | Correct | 4 ms | 4972 KB | Output is correct |
12 | Correct | 4 ms | 4972 KB | Output is correct |
13 | Correct | 4 ms | 5100 KB | Output is correct |
14 | Correct | 4 ms | 5100 KB | Output is correct |
15 | Correct | 4 ms | 5100 KB | Output is correct |
16 | Correct | 6 ms | 5100 KB | Output is correct |
17 | Correct | 6 ms | 5100 KB | Output is correct |
18 | Correct | 6 ms | 5100 KB | Output is correct |
19 | Correct | 5 ms | 5100 KB | Output is correct |
20 | Correct | 5 ms | 5100 KB | Output is correct |
21 | Correct | 5 ms | 5100 KB | Output is correct |
22 | Correct | 6 ms | 5100 KB | Output is correct |
23 | Execution timed out | 1096 ms | 5484 KB | Time limit exceeded |
24 | Halted | 0 ms | 0 KB | - |