Submission #670174

# Submission time Handle Problem Language Result Execution time Memory
670174 2022-12-08T08:37:10 Z Mahdi Beads and wires (APIO14_beads) C++17
100 / 100
259 ms 24448 KB
#include<bits/stdc++.h>
#pragma GCC optimize("Ofast")
using namespace std;
#define all(v) v.begin(), v.end()
#define F first
#define S second
typedef long long ll;
typedef pair<int, int> pii;
const int N=2e5+5;
int n, a[N], b[N], c[N], d[N], py[N];
vector<pii>g[N];

void dfs(const int &v, const int &p=-1){
    for(pii u: g[v]){
        if(u.F!=p){
            py[u.F]=u.S;
            dfs(u.F, v);
            d[v]+=c[u.F];
        }
    }
    b[v]=c[v]=d[v];
    int w=0, x=-2e9, y=-2e9, z=-2e9;
    for(pii u: g[v]){
        if(u.F!=p){
            c[v]=max(c[v], d[v]-c[u.F]+d[u.F]+u.S+py[v]);
            b[v]=max(b[v], d[v]-c[u.F]+a[u.F]);
            a[v]=max(a[v], d[v]-c[u.F]+b[u.F]+u.S+py[v]);
            z=max({z+c[u.F], y+d[u.F]+u.S, x+b[u.F]+u.S});
            y=max(y+c[u.F], w+b[u.F]+u.S);
            x=max(x+c[u.F], w+d[u.F]+u.S);
            w+=c[u.F];
        }
    }
    b[v]=max(b[v], z);
    a[v]=max({a[v], b[v], y+py[v]});
}

int main(){
    cin>>n;
    for(int i=1;i<n;++i){
        int u, v, w;
        cin>>u>>v>>w;
        g[--u].push_back({--v, w});
        g[v].push_back({u, w});
    }
    py[0]=-2e9;
    dfs(0);
    cout<<a[0]<<'\n';
}
# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4924 KB Output is correct
5 Correct 2 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 4 ms 4948 KB Output is correct
9 Correct 3 ms 4968 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5004 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4924 KB Output is correct
5 Correct 2 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 4 ms 4948 KB Output is correct
9 Correct 3 ms 4968 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5004 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5008 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5004 KB Output is correct
20 Correct 3 ms 5036 KB Output is correct
21 Correct 3 ms 5012 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4924 KB Output is correct
5 Correct 2 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 4 ms 4948 KB Output is correct
9 Correct 3 ms 4968 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5004 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5008 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5004 KB Output is correct
20 Correct 3 ms 5036 KB Output is correct
21 Correct 3 ms 5012 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 7 ms 5376 KB Output is correct
24 Correct 7 ms 5384 KB Output is correct
25 Correct 7 ms 5348 KB Output is correct
26 Correct 13 ms 5660 KB Output is correct
27 Correct 12 ms 5660 KB Output is correct
28 Correct 11 ms 5716 KB Output is correct
29 Correct 12 ms 5656 KB Output is correct
30 Correct 10 ms 5776 KB Output is correct
31 Correct 12 ms 6044 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4924 KB Output is correct
5 Correct 2 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 4 ms 4948 KB Output is correct
9 Correct 3 ms 4968 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5004 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 3 ms 5008 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 4 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5004 KB Output is correct
20 Correct 3 ms 5036 KB Output is correct
21 Correct 3 ms 5012 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 7 ms 5376 KB Output is correct
24 Correct 7 ms 5384 KB Output is correct
25 Correct 7 ms 5348 KB Output is correct
26 Correct 13 ms 5660 KB Output is correct
27 Correct 12 ms 5660 KB Output is correct
28 Correct 11 ms 5716 KB Output is correct
29 Correct 12 ms 5656 KB Output is correct
30 Correct 10 ms 5776 KB Output is correct
31 Correct 12 ms 6044 KB Output is correct
32 Correct 48 ms 8552 KB Output is correct
33 Correct 54 ms 8576 KB Output is correct
34 Correct 47 ms 8624 KB Output is correct
35 Correct 259 ms 19788 KB Output is correct
36 Correct 244 ms 19852 KB Output is correct
37 Correct 247 ms 19896 KB Output is correct
38 Correct 204 ms 20320 KB Output is correct
39 Correct 192 ms 19492 KB Output is correct
40 Correct 206 ms 20280 KB Output is correct
41 Correct 250 ms 24448 KB Output is correct