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답안 #1051533

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1051533 2024-08-10T07:52:32 Z phong 공장들 (JOI14_factories) C++17
100 / 100
 4005 ms 169404 KB 
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#include "factories.h"

#define ll long long
const int nmax = 5e5 + 5, N = 1e6;
const ll oo = 1e18 + 5, base = 311;
const int lg = 18, tx = 26;
const ll mod = 998244353;
#define pii pair<ll, ll>
#define fi first
#define se second
#define endl "\n"
#define debug(a, n) for(int i = 1; i <= n; ++i) cout << a[i] << ' '; cout << "\n";
using namespace std;

int n, q;
vector<pii> adj[nmax];
int h[nmax], up[nmax][lg + 1];
ll d[nmax];

void dfs_1(int u, int p){
    for(auto [w, v] : adj[u]){
        if(v == p) continue;
        h[v] = h[u] + 1;
        up[v][0] = u;
        d[v] = d[u] + w;
        for(int j = 1; j <= lg; ++j) up[v][j] = up[up[v][j - 1]][j - 1];
        dfs_1(v, u);
    }
}
int lca(int u, int v){
    if(h[u] != h[v]){
        if(h[u] < h[v]) swap(u, v);
        int k = h[u] - h[v];
        for(int j = 0; j <= __lg(k); ++j){
            if(k >> j & 1) u = up[u][j];
        }
    }
    if(u == v) return u;
    for(int j = __lg(h[u]); j >=0;--j){
        if(up[u][j] != up[v][j]){
            u = up[u][j];
            v = up[v][j];
        }
    }
    return up[u][0];
}
ll dist(int u, int v){
    return d[u] + d[v] - 2 * d[lca(u, v)];
}
bool vis[nmax];
int sz[nmax], par[nmax];

void dfs_2(int u, int p){
    sz[u] = 1;
    for(auto [w, v] : adj[u]){
        if(v == p || vis[v]) continue;
        dfs_2(v, u);
        sz[u] += sz[v];
    }
}
int cntw  = 0;
int Find(int u, int p){
    for(auto [w,v] : adj[u]){
        if(v == p || vis[v]) continue;
        if(sz[v] > cntw / 2) return Find(v, u);
    }
    return u;
}
int centroid(int u){
    dfs_2(u, -1); cntw = sz[u];
    int root = Find(u, -1);
    vis[root] = 1;
    for(auto [w, v] : adj[root]){
        if(vis[v]) continue;
        int x = centroid(v);
        par[x] = root;
    }
    return root;
}
vector<int> rev;
ll dp[nmax];
void update(int u){
    int x = u;
    while(u > 0){
        dp[u] = min(dp[u], dist(u, x));
        rev.push_back(u);
        u = par[u];
    }
}
ll get(int u){
    int x = u;
    ll res = oo;
    while(u > 0){
        res = min(res, dp[u] + dist(u, x));
        u = par[u];
    }
    return res;
}
int X[nmax], Y[nmax], S, T;
void Init(int n, int A[], int B[], int D[]){
    for(int i = 0; i < n - 1; ++i){
        int u, v, w;
        u = A[i], v = B[i], w = D[i];
        ++u, ++v;
        adj[u].push_back({w, v});
        adj[v].push_back({w, u});
    }
    dfs_1(1, -1);
    centroid(1);
    memset(dp, 0x3f, sizeof dp);
}
ll Query(int S, int X[], int T, int Y[]){
    for(int i = 0; i < S; ++i) ++X[i];
    for(int i = 0; i < T; ++i) ++Y[i];
    for(int i = 0; i < S; ++i) update(X[i]);
    ll ans = oo;
    for(int i = 0; i < T; ++i){
        ans = min(ans,get(Y[i]));
    }
    for(auto p : rev)dp[p] = oo;
    rev.clear();
    return ans;
}

/*

*/

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 41308 KB Output is correct
2 Correct 250 ms 45800 KB Output is correct
3 Correct 639 ms 55376 KB Output is correct
4 Correct 580 ms 55640 KB Output is correct
5 Correct 691 ms 55940 KB Output is correct
6 Correct 120 ms 55376 KB Output is correct
7 Correct 611 ms 55392 KB Output is correct
8 Correct 655 ms 55452 KB Output is correct
9 Correct 679 ms 55952 KB Output is correct
10 Correct 137 ms 55376 KB Output is correct
11 Correct 630 ms 55380 KB Output is correct

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 41304 KB Output is correct
2 Correct 829 ms 114164 KB Output is correct
3 Correct 1926 ms 137300 KB Output is correct
4 Correct 339 ms 129968 KB Output is correct
5 Correct 2671 ms 167172 KB Output is correct
6 Correct 2037 ms 137804 KB Output is correct
7 Correct 1732 ms 75088 KB Output is correct
8 Correct 187 ms 75716 KB Output is correct
9 Correct 1626 ms 79188 KB Output is correct
10 Correct 1719 ms 75752 KB Output is correct

Subtask #3
67.0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 41308 KB Output is correct
2 Correct 250 ms 45800 KB Output is correct
3 Correct 639 ms 55376 KB Output is correct
4 Correct 580 ms 55640 KB Output is correct
5 Correct 691 ms 55940 KB Output is correct
6 Correct 120 ms 55376 KB Output is correct
7 Correct 611 ms 55392 KB Output is correct
8 Correct 655 ms 55452 KB Output is correct
9 Correct 679 ms 55952 KB Output is correct
10 Correct 137 ms 55376 KB Output is correct
11 Correct 630 ms 55380 KB Output is correct
12 Correct 5 ms 41304 KB Output is correct
13 Correct 829 ms 114164 KB Output is correct
14 Correct 1926 ms 137300 KB Output is correct
15 Correct 339 ms 129968 KB Output is correct
16 Correct 2671 ms 167172 KB Output is correct
17 Correct 2037 ms 137804 KB Output is correct
18 Correct 1732 ms 75088 KB Output is correct
19 Correct 187 ms 75716 KB Output is correct
20 Correct 1626 ms 79188 KB Output is correct
21 Correct 1719 ms 75752 KB Output is correct
22 Correct 1084 ms 139460 KB Output is correct
23 Correct 1173 ms 143064 KB Output is correct
24 Correct 3260 ms 146488 KB Output is correct
25 Correct 3517 ms 148648 KB Output is correct
26 Correct 3176 ms 142220 KB Output is correct
27 Correct 4005 ms 169404 KB Output is correct
28 Correct 434 ms 137388 KB Output is correct
29 Correct 3166 ms 141904 KB Output is correct
30 Correct 3128 ms 141140 KB Output is correct
31 Correct 3233 ms 141944 KB Output is correct
32 Correct 1627 ms 84416 KB Output is correct
33 Correct 185 ms 75068 KB Output is correct
34 Correct 506 ms 73440 KB Output is correct
35 Correct 494 ms 73316 KB Output is correct
36 Correct 1752 ms 76116 KB Output is correct
37 Correct 1727 ms 75856 KB Output is correct