Submission #198201

#	Time	Username	Problem	Language	Result	Execution time	Memory
198201		mehrdad_sohrabi	Beads and wires (APIO14_beads)	C++14	0 / 100	8 ms	4984 KiB

beads

#include <bits/stdc++.h>
typedef long long int ll;
typedef long double ld;
#define pb push_back
#define pii pair < int, int >
#define F first
#define S second
#define int long long int
#define sync ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#define endl '\n'
using namespace std;
const int N=2e5+100;
vector <pii> g[N];
ll vis[N];
ll ans=0;
ll dfs(ll v,ll p,ll w){
    vector <int> a;
    for (auto u : g[v]){
        if (u.F==p) continue;
        dfs(u.F,v,u.S);
        if (vis[u.F]) continue;
        a.pb(u.S);
    }
    sort(a.begin(),a.end());
    reverse(a.begin(),a.end());
    if (p!=-1 && a.size()){
        ans+=a[0]+w;
        vis[v]=1;
    }
}
int32_t main(){
    ll n;
    cin >> n;
    for (int i=0;i<n-1;i++){
        ll u,v,w;
        cin >> u >> v >> w;
        g[u].pb({v,w});
        g[v].pb({u,w});
    }
    ll ma=0;
    for (int i=1;i<=n;i++){
        ans=0;
        dfs(i,-1,0);
        ma=max(ma,ans);
    }
    cout << ma << endl;
}

Compilation message (stderr)

beads.cpp: In function 'll dfs(ll, ll, ll)':
beads.cpp:32:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

• Subtask 1: 0 / 13
• Subtask 2: 0 / 15
• Subtask 3: 0 / 29
• Subtask 4: 0 / 43