oj.uz

Submission #992550

# Submission time Handle Problem Language Result Execution time Memory
992550 2024-06-04T16:25:04 Z Abito Paths (RMI21_paths) C++17
36 / 100
 600 ms 668 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
//#define int long long
#define ll long long
#define y1 YONE
typedef unsigned long long ull;
using namespace std;
const int N=2005;
int n,k,tin[N],sz[N],par[N],t,v[N],tree[N],lx,rx;
vector<pair<int,ll>> adj[N];
pair<ll,int> seg[4*N+5];
ll dis[N],lazy[4*N+5],val;
bool vis[N];
void dfs(int x,int p){
    par[x]=p;
    sz[x]=1;
    t++;
    tin[x]=t;
    tree[t]=x;
    for (auto u:adj[x]){
        if (p==u.F) continue;
        v[u.F]=u.S;
        dis[u.F]=dis[x]+u.S;
        dfs(u.F,x);
        sz[x]+=sz[u.F];
    }return;
}
void build(int x,int l,int r){
    lazy[x]=0;
    if (l==r){
        seg[x]={dis[tree[l]],tree[l]};
        return;
    }int mid=(l+r)/2;
    build(x*2,l,mid);
    build(x*2+1,mid+1,r);
    seg[x]=max(seg[x*2],seg[x*2+1]);
    return;
}
void push(int x){
    seg[x*2].F+=lazy[x];
    seg[x*2+1].F+=lazy[x];
    lazy[x*2]+=lazy[x];
    lazy[x*2+1]+=lazy[x];
    lazy[x]=0;
    return;
}
void edit(int x,int l,int r){
    if (l>rx || r<lx) return;
    if (l>=lx && r<=rx){
        seg[x].F+=val;
        lazy[x]+=val;
        return;
    }int mid=(l+r)/2;
    push(x);
    edit(x*2,l,mid);
    edit(x*2+1,mid+1,r);
    seg[x]=max(seg[x*2],seg[x*2+1]);
    return;
}
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    cin>>n>>k;
    for (int i=1;i<n;i++){
        int x,y,w;
        cin>>x>>y>>w;
        adj[x].pb({y,w});
        adj[y].pb({x,w});
    }int l=0;
    for (int i=1;i<=n;i++) l+=bool(adj[i].size()==1);
    k=min(k,l);
    for (int i=1;i<=n;i++){
        t=0;dis[i]=0;v[i]=0;par[i]=0;
        memset(vis,0,sizeof(vis));
        dfs(i,0);
        build(1,1,n);
        ll ans=0;
        for (int kk=1;kk<=k;kk++){
            int x=seg[1].S;
            //cout<<x<<' ';
            while (!vis[x] && x){
                ans+=v[x];
                lx=tin[x];
                rx=tin[x]+sz[x]-1;
                val=-v[x];
                if (v[x]) edit(1,1,n);
                v[x]=0;
                vis[x]=1;
                x=par[x];
            }
        }cout<<ans<<endl;

    }
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 3 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 4 ms 348 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 3 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 4 ms 348 KB Output is correct
8 Correct 98 ms 604 KB Output is correct
9 Correct 151 ms 604 KB Output is correct
10 Correct 153 ms 668 KB Output is correct
11 Correct 46 ms 600 KB Output is correct
12 Correct 96 ms 668 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 3 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 4 ms 348 KB Output is correct
8 Correct 98 ms 604 KB Output is correct
9 Correct 151 ms 604 KB Output is correct
10 Correct 153 ms 668 KB Output is correct
11 Correct 46 ms 600 KB Output is correct
12 Correct 96 ms 668 KB Output is correct
13 Execution timed out 679 ms 600 KB Time limit exceeded
14 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 604 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 3 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 4 ms 348 KB Output is correct
8 Correct 98 ms 604 KB Output is correct
9 Correct 151 ms 604 KB Output is correct
10 Correct 153 ms 668 KB Output is correct
11 Correct 46 ms 600 KB Output is correct
12 Correct 96 ms 668 KB Output is correct
13 Execution timed out 679 ms 600 KB Time limit exceeded
14 Halted 0 ms 0 KB -