oj.uz

Submission #645448

# Submission time Handle Problem Language Result Execution time Memory
645448 2022-09-27T06:54:42 Z karrigan Factories (JOI14_factories) C++14
18 / 100
 8000 ms 141716 KB 
#include "factories.h"
#include<bits/stdc++.h>
using namespace std;
const long long mx=1e15;
struct edg{
int v;
long long w;
};
vector<edg>g[500001];
long long dis[500001];
int dep[500001];
int st[500001][21];
int sub[500001];
int use[500001];
void dfs(int u,int par){
    for (auto v:g[u]){
        if (v.v==par)continue;
        dis[v.v]=v.w+dis[u];
        dep[v.v]=dep[u]+1;
        st[v.v][0]=u;
        dfs(v.v,u);
    }
}
int lca(int u,int v){
if (dep[u]<dep[v])swap(u,v);
int k=dep[u]-dep[v];
for (int i=20;i>=0;i--){
    if (k>>i&1){
        u=st[u][i];
    }
}
if (u==v)return u;
for (int i=20;i>=0;i--){
    if (st[u][i]==0||st[v][i]==0)continue;
    if (st[u][i]!=st[v][i]){
        u=st[u][i];
        v=st[v][i];
    }
}
return st[u][0];
}
long long cal(int u,int v){
return dis[u]+dis[v]-2*dis[lca(u,v)];
}
int dfs2(int u,int par){
    sub[u]=1;
    for (auto v:g[u]){
        int lm=v.v;
        if (use[lm]||lm==par)continue;
        dfs2(lm,u);
        sub[u]+=sub[lm];
    }
    return sub[u];
}
int centroid(int u,int p,int sz){
    for (auto v:g[u]){
        if (use[v.v]||v.v==p)continue;
        if (sub[v.v]*2>sz)return centroid(v.v,u,sz);
    }
    return u;
}
int par[500001];
long long mxx[500001];
int decompose(int u,int p){
int sz=dfs2(u,0);
int cen=centroid(u,0,sz);
use[cen]=1;
if (p!=0){
    par[cen]=p;
}
for (auto v:g[cen]){
    if (use[v.v])continue;
    decompose(v.v,cen);
}
return cen;
}
void Init(int n,int a[],int b[],int d[]){
for (int i=0;i<n-1;i++){
    a[i]++;
    b[i]++;
    g[a[i]].push_back({b[i],d[i]});
    g[b[i]].push_back({a[i],d[i]});
}
dfs(1,0);
for (int i=1;i<=20;i++){
    for (int j=1;j<=n;j++){
        st[j][i]=st[st[j][i-1]][i-1];
    }
}
for (int i=1;i<=n;i++){
    mxx[i]=1e17;
}
decompose(1,0);
}
void update(int u,int pos){
if (pos==0)return;
mxx[pos]=min(mxx[u],cal(u,pos));
update(u,par[pos]);
}
void res(int u,int pos){
if (pos==0)return;
mxx[pos]=1e17;
res(u,par[pos]);
}
long long get(int u,int pos){
long long ans=1e17;
if (pos==0)return ans;
ans=min(ans,cal(u,pos)+mxx[pos]);
ans=min(ans,get(u,par[pos]));
return ans;
}
long long Query(int s,int x[],int t,int y[]){
long long ans=1e17;
for (int i=0;i<s;i++){
    for (int j=0;j<t;j++){
        ans=min(ans,cal(x[i]+1,y[j]+1));
    }
}
return ans;
}

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 124 ms 12444 KB Output is correct
2 Execution timed out 8032 ms 20904 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 12244 KB Output is correct
2 Correct 1722 ms 107332 KB Output is correct
3 Correct 3575 ms 111064 KB Output is correct
4 Correct 924 ms 104852 KB Output is correct
5 Correct 3695 ms 141716 KB Output is correct
6 Correct 3077 ms 112344 KB Output is correct
7 Correct 3932 ms 39884 KB Output is correct
8 Correct 1074 ms 39688 KB Output is correct
9 Correct 3555 ms 44528 KB Output is correct
10 Correct 2892 ms 41176 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 124 ms 12444 KB Output is correct
2 Execution timed out 8032 ms 20904 KB Time limit exceeded
3 Halted 0 ms 0 KB -