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Submission #109205

# Submission time Handle Problem Language Result Execution time Memory
109205 2019-05-05T13:47:26 Z thebes Factories (JOI14_factories) C++14
100 / 100
 5390 ms 216232 KB 
#include <bits/stdc++.h>
using namespace std;

const int MN = 5e5+5, LG = 20;
typedef long long ll;
ll N, i, j, anc[MN][LG], st[MN], en[MN], t, a[MN], b[MN], d[MN], dep[MN], col[MN];
vector<ll> vec;
vector<pair<ll,ll>> adj[MN];
void dfs(int n,int p,int dp){
    anc[n][0] = p; dep[n] = dp; st[n] = ++t;
    for(auto v : adj[n]){
        if(v.first==p) continue;
        d[v.first] = d[n]+v.second;
        dfs(v.first, n, dp+1);
    }
    en[n] = t;
}
void Init(int n,int *A,int *B,int *C){
    N = n;
    for(int i=0;i<n-1;i++){
        adj[A[i]].push_back({B[i],C[i]});
        adj[B[i]].push_back({A[i],C[i]});
    }
    dfs(0, -1, 1);
    for(int j=1;j<LG;j++){
        for(int i=0;i<N;i++){
            if(anc[i][j-1]!=-1)
                anc[i][j]=anc[anc[i][j-1]][j-1];
        }
    }
}
int lca(int x,int y){
    if(dep[x]<dep[y]) swap(x,y);
    for(int i=LG-1;i>=0;i--){
        if((1<<i)<=dep[x]-dep[y])
            x = anc[x][i];
    }
    if(x==y) return x;
    for(int i=LG-1;i>=0;i--){
        if(anc[x][i]!=anc[y][i]){
            x = anc[x][i];
            y = anc[y][i];
        }
    }
    return anc[x][0];
}
bool cmp(int i,int j){return st[i]<st[j];}
ll Query(int S,int *X,int T,int *Y){
    ll ans = 1LL<<60;
    int *arr = (int*)malloc(sizeof(int)*(S+T));
    for(int i=0;i<S;i++) arr[i]=X[i];
    for(int i=0;i<T;i++) arr[i+S]=Y[i];
    sort(arr,arr+S+T,cmp);
    vec.clear();
    for(i=0;i<S+T-1;i++)
        vec.push_back(lca(arr[i],arr[i+1]));
    for(i=0;i<S+T;i++)
        vec.push_back(arr[i]);
    sort(vec.begin(),vec.end(),cmp);
    vec.erase(unique(vec.begin(),vec.end()),vec.end());
    for(auto v : vec) col[v] = -1;
    for(i=0;i<S;i++) col[X[i]]=0;
    for(i=0;i<T;i++) col[Y[i]]=1;
    stack<int> lst;
    for(auto v : vec){
        a[v] = b[v] = 1LL<<60;
        if(col[v]==0) a[v] = 0;
        else if(col[v]==1) b[v] = 0;
        while(lst.size()&&en[lst.top()]<st[v]){
            int n = lst.top();
            ans = min(ans, a[n]+b[n]);
            lst.pop();
            if(lst.size()){
                a[lst.top()]=min(a[lst.top()],a[n]+d[n]-d[lst.top()]);
                b[lst.top()]=min(b[lst.top()],b[n]+d[n]-d[lst.top()]);
            }
        }
        lst.push(v);
    }
    while(lst.size()){
        int n = lst.top();
        ans = min(ans, a[n]+b[n]);
        lst.pop();
        if(lst.size()){
            a[lst.top()]=min(a[lst.top()],a[n]+d[n]-d[lst.top()]);
            b[lst.top()]=min(b[lst.top()],b[n]+d[n]-d[lst.top()]);
        }
    }
    return ans;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 12928 KB Output is correct
2 Correct 1140 ms 39112 KB Output is correct
3 Correct 1091 ms 38904 KB Output is correct
4 Correct 1081 ms 39240 KB Output is correct
5 Correct 951 ms 39264 KB Output is correct
6 Correct 727 ms 38904 KB Output is correct
7 Correct 969 ms 38896 KB Output is correct
8 Correct 981 ms 39092 KB Output is correct
9 Correct 1061 ms 39280 KB Output is correct
10 Correct 738 ms 38948 KB Output is correct
11 Correct 1082 ms 38904 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 12416 KB Output is correct
2 Correct 2206 ms 162264 KB Output is correct
3 Correct 3149 ms 164212 KB Output is correct
4 Correct 1665 ms 159876 KB Output is correct
5 Correct 3331 ms 189176 KB Output is correct
6 Correct 3386 ms 184708 KB Output is correct
7 Correct 3067 ms 72300 KB Output is correct
8 Correct 1441 ms 72548 KB Output is correct
9 Correct 3107 ms 76612 KB Output is correct
10 Correct 3120 ms 74136 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 12928 KB Output is correct
2 Correct 1140 ms 39112 KB Output is correct
3 Correct 1091 ms 38904 KB Output is correct
4 Correct 1081 ms 39240 KB Output is correct
5 Correct 951 ms 39264 KB Output is correct
6 Correct 727 ms 38904 KB Output is correct
7 Correct 969 ms 38896 KB Output is correct
8 Correct 981 ms 39092 KB Output is correct
9 Correct 1061 ms 39280 KB Output is correct
10 Correct 738 ms 38948 KB Output is correct
11 Correct 1082 ms 38904 KB Output is correct
12 Correct 15 ms 12416 KB Output is correct
13 Correct 2206 ms 162264 KB Output is correct
14 Correct 3149 ms 164212 KB Output is correct
15 Correct 1665 ms 159876 KB Output is correct
16 Correct 3331 ms 189176 KB Output is correct
17 Correct 3386 ms 184708 KB Output is correct
18 Correct 3067 ms 72300 KB Output is correct
19 Correct 1441 ms 72548 KB Output is correct
20 Correct 3107 ms 76612 KB Output is correct
21 Correct 3120 ms 74136 KB Output is correct
22 Correct 4120 ms 191516 KB Output is correct
23 Correct 3910 ms 195788 KB Output is correct
24 Correct 4597 ms 194648 KB Output is correct
25 Correct 4702 ms 198996 KB Output is correct
26 Correct 5366 ms 193656 KB Output is correct
27 Correct 4810 ms 216232 KB Output is correct
28 Correct 3170 ms 193700 KB Output is correct
29 Correct 5390 ms 193124 KB Output is correct
30 Correct 5091 ms 192764 KB Output is correct
31 Correct 5267 ms 193272 KB Output is correct
32 Correct 2647 ms 79064 KB Output is correct
33 Correct 1656 ms 74864 KB Output is correct
34 Correct 2524 ms 69208 KB Output is correct
35 Correct 2625 ms 69088 KB Output is correct
36 Correct 3189 ms 69848 KB Output is correct
37 Correct 3118 ms 69820 KB Output is correct