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Submission #197727

# Submission time Handle Problem Language Result Execution time Memory
197727 2020-01-22T15:15:30 Z moonrabbit2 Beads and wires (APIO14_beads) C++17
57 / 100
 1000 ms 20424 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
using namespace std;
typedef long long ll;
typedef double db;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<db,db> pdb;
typedef tuple<int,int,int> tii;
typedef vector<vector<ll>> mat;
const ll mod=1e9+7;
const int N=2e5+5;
int n,ans,dp1[N],dp2[N],dp3[N],dp4[N],val[N];
vector<pii> g[N];
//dp1 : 없/끝, dp2 : 없/부모로, dp3 : 있/끝, dp4 : 있/부모로
void dfs(int x,int p){
    vector<int> v1,v2;
    dp2[x]=dp3[x]=dp4[x]=-1e9;
    int s=0;
    for(auto &it : g[x]) if(it.fi!=p){
        int u=it.fi,c=it.se;
        dfs(u,x);
        val[u]=max(dp1[u],dp2[u]+c);
        dp1[x]+=max(dp1[u],dp2[u]+c);
        s+=val[u];
    }
    for(auto &it : g[x]) if(it.fi!=p){
        int u=it.fi,c=it.se;
        dp2[x]=max(dp2[x],dp1[x]-val[u]+dp1[u]+c);
        dp3[x]=max(dp3[x],dp1[x]-val[u]+max(dp3[u],dp4[u]+c));
        dp4[x]=max(dp4[x],dp1[x]-val[u]+dp3[u]+c);
    }
    for(auto &it : g[x]) if(it.fi!=p){
        int u=it.fi,c=it.se;
        for(auto &it2 : g[x]) if(it2.fi!=p&&it2.fi!=u){
            int v=it2.fi,c2=it2.se;
            dp3[x]=max(dp3[x],dp1[x]-val[u]-val[v]+max(dp1[u],dp3[u])+dp1[v]+c+c2);
        }
    }
    //cout<<x<<" : "<<dp1[x]<<" "<<dp2[x]<<" "<<dp3[x]<<" "<<dp4[x]<<"\n";
}
int main(){
    ios::sync_with_stdio(false); cin.tie(0);
	cin>>n; int s=0;
    for(int u,v,c,i=1;i<n;i++){
        cin>>u>>v>>c;
        s+=c;
        g[u].emplace_back(v,c);
        g[v].emplace_back(u,c);
    }
    dfs(1,0);
    cout<<max(dp1[1],dp3[1]);
    return 0;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5112 KB Output is correct
2 Correct 7 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 5 ms 5084 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 6 ms 4984 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5112 KB Output is correct
2 Correct 7 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 5 ms 5084 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 6 ms 4984 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 3 ms 4984 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 7 ms 5112 KB Output is correct
16 Correct 6 ms 5112 KB Output is correct
17 Correct 6 ms 5112 KB Output is correct
18 Correct 6 ms 4988 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 5112 KB Output is correct
21 Correct 6 ms 5112 KB Output is correct
22 Correct 6 ms 5112 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5112 KB Output is correct
2 Correct 7 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 5 ms 5084 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 6 ms 4984 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 3 ms 4984 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 7 ms 5112 KB Output is correct
16 Correct 6 ms 5112 KB Output is correct
17 Correct 6 ms 5112 KB Output is correct
18 Correct 6 ms 4988 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 5112 KB Output is correct
21 Correct 6 ms 5112 KB Output is correct
22 Correct 6 ms 5112 KB Output is correct
23 Correct 10 ms 5496 KB Output is correct
24 Correct 9 ms 5368 KB Output is correct
25 Correct 9 ms 5368 KB Output is correct
26 Correct 12 ms 5752 KB Output is correct
27 Correct 13 ms 5752 KB Output is correct
28 Correct 280 ms 5880 KB Output is correct
29 Correct 127 ms 5752 KB Output is correct
30 Correct 103 ms 5880 KB Output is correct
31 Correct 66 ms 6112 KB Output is correct

Subtask #4
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5112 KB Output is correct
2 Correct 7 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 5 ms 5084 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 6 ms 4984 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 3 ms 4984 KB Output is correct
14 Correct 6 ms 5112 KB Output is correct
15 Correct 7 ms 5112 KB Output is correct
16 Correct 6 ms 5112 KB Output is correct
17 Correct 6 ms 5112 KB Output is correct
18 Correct 6 ms 4988 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 5112 KB Output is correct
21 Correct 6 ms 5112 KB Output is correct
22 Correct 6 ms 5112 KB Output is correct
23 Correct 10 ms 5496 KB Output is correct
24 Correct 9 ms 5368 KB Output is correct
25 Correct 9 ms 5368 KB Output is correct
26 Correct 12 ms 5752 KB Output is correct
27 Correct 13 ms 5752 KB Output is correct
28 Correct 280 ms 5880 KB Output is correct
29 Correct 127 ms 5752 KB Output is correct
30 Correct 103 ms 5880 KB Output is correct
31 Correct 66 ms 6112 KB Output is correct
32 Correct 41 ms 8864 KB Output is correct
33 Correct 49 ms 8668 KB Output is correct
34 Correct 39 ms 8668 KB Output is correct
35 Correct 208 ms 19948 KB Output is correct
36 Correct 214 ms 19960 KB Output is correct
37 Correct 216 ms 19960 KB Output is correct
38 Execution timed out 1075 ms 20424 KB Time limit exceeded
39 Halted 0 ms 0 KB -