oj.uz

Submission #1109012

# Submission time Handle Problem Language Result Execution time Memory
1109012 2024-11-05T18:52:54 Z doducanh Factories (JOI14_factories) C++14
100 / 100
 4370 ms 353096 KB 
#include <bits/stdc++.h>
//#include "factories.h"
using namespace std;
#define ll long long
#define fi first
#define se second
const ll MOD = 1e9 + 7;
const ll N = 5e5 + 2;
const ll inf = 1e14 + 2;

vector<ll> minn(N);
vector<int> sz(N), used(N, 0);
vector<vector<pair<int, ll>>> adj(N), ancestors(N);

int n;
int dfs(int u,int par)
{
    sz[u]=1;
    for(pair<int,ll>pp:adj[u]){
        int v=pp.fi;
        int w=pp.se;
        if(v==par||used[v])continue;
        sz[u]+=dfs(v,u);
    }
    return sz[u];
}
void dfs2(int u,int par,int cen,ll depth)
{
    ancestors[u].push_back({cen,depth});
    for(pair<int,ll> pp:adj[u]){
        int v=pp.fi;
        ll w=pp.se;
        if(v==par||used[v])continue;
        dfs2(v,u,cen,depth+w);
    }
}
int getcen(int u,int par,int treesize)
{
    for(pair<int,ll> pp:adj[u]){
        int v=pp.fi;
        if(v==par||used[v])continue;
        if((sz[v]*2)>treesize)return getcen(v,u,treesize);
    }
    return u;
}
void find_cent(int node, int parent, int size) {
    int C=getcen(node,-1,dfs(node,-1));
    dfs2(C, -1, C, 0);
    used[C] = 1;
    for (auto child :adj[C]) {
        if (used[child.first]) continue;
        find_cent(child.first, C,dfs(child.fi,C));
    }
}
void Init(int N, int A[], int B[], int D[]) {
    for (int i = 0; i < N-1; i++) {
        adj[A[i]].push_back(make_pair(B[i], D[i]));
        adj[B[i]].push_back(make_pair(A[i], D[i]));
    }
    find_cent(0, -1,dfs(0,-1));
}
long long Query(int S, int X[], int T, int Y[])
{
    for(int i=0;i<T;i++){
        for(pair<int,long long> y:ancestors[Y[i]]){
            minn[y.fi]=inf;
        }
    }
    for(int i=0;i<S;i++){
        for(pair<int,ll> y:ancestors[X[i]]){
            minn[y.fi]=min(minn[y.fi],y.se);
        }
    }
    ll ans=inf;
    for(int i=0;i<T;i++){
        for(pair<int,ll> y:ancestors[Y[i]]){
            ans=min(ans,minn[y.fi]+y.se);
        }
    }
    return ans;
}

Compilation message

factories.cpp: In function 'int dfs(int, int)':
factories.cpp:21:13: warning: unused variable 'w' [-Wunused-variable]
   21 |         int w=pp.se;
      |             ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 48208 KB Output is correct
2 Correct 198 ms 53320 KB Output is correct
3 Correct 219 ms 53832 KB Output is correct
4 Correct 212 ms 53844 KB Output is correct
5 Correct 232 ms 54104 KB Output is correct
6 Correct 159 ms 52776 KB Output is correct
7 Correct 207 ms 53600 KB Output is correct
8 Correct 207 ms 53832 KB Output is correct
9 Correct 219 ms 54088 KB Output is correct
10 Correct 154 ms 52808 KB Output is correct
11 Correct 218 ms 53804 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 48208 KB Output is correct
2 Correct 1699 ms 207728 KB Output is correct
3 Correct 2932 ms 279684 KB Output is correct
4 Correct 623 ms 102312 KB Output is correct
5 Correct 3827 ms 353096 KB Output is correct
6 Correct 3065 ms 279148 KB Output is correct
7 Correct 584 ms 86600 KB Output is correct
8 Correct 236 ms 59832 KB Output is correct
9 Correct 744 ms 89532 KB Output is correct
10 Correct 651 ms 87008 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 48208 KB Output is correct
2 Correct 198 ms 53320 KB Output is correct
3 Correct 219 ms 53832 KB Output is correct
4 Correct 212 ms 53844 KB Output is correct
5 Correct 232 ms 54104 KB Output is correct
6 Correct 159 ms 52776 KB Output is correct
7 Correct 207 ms 53600 KB Output is correct
8 Correct 207 ms 53832 KB Output is correct
9 Correct 219 ms 54088 KB Output is correct
10 Correct 154 ms 52808 KB Output is correct
11 Correct 218 ms 53804 KB Output is correct
12 Correct 13 ms 48208 KB Output is correct
13 Correct 1699 ms 207728 KB Output is correct
14 Correct 2932 ms 279684 KB Output is correct
15 Correct 623 ms 102312 KB Output is correct
16 Correct 3827 ms 353096 KB Output is correct
17 Correct 3065 ms 279148 KB Output is correct
18 Correct 584 ms 86600 KB Output is correct
19 Correct 236 ms 59832 KB Output is correct
20 Correct 744 ms 89532 KB Output is correct
21 Correct 651 ms 87008 KB Output is correct
22 Correct 2156 ms 204840 KB Output is correct
23 Correct 2130 ms 208212 KB Output is correct
24 Correct 3612 ms 277048 KB Output is correct
25 Correct 3385 ms 279604 KB Output is correct
26 Correct 3480 ms 278708 KB Output is correct
27 Correct 4370 ms 349768 KB Output is correct
28 Correct 774 ms 108640 KB Output is correct
29 Correct 3435 ms 277860 KB Output is correct
30 Correct 3186 ms 277880 KB Output is correct
31 Correct 3229 ms 288140 KB Output is correct
32 Correct 726 ms 103824 KB Output is correct
33 Correct 241 ms 65424 KB Output is correct
34 Correct 435 ms 79688 KB Output is correct
35 Correct 466 ms 81480 KB Output is correct
36 Correct 617 ms 88904 KB Output is correct
37 Correct 575 ms 85732 KB Output is correct