oj.uz

Submission #945215

# Submission time Handle Problem Language Result Execution time Memory
945215 2024-03-13T14:27:46 Z VMaksimoski008 Factories (JOI14_factories) C++14
100 / 100
 3916 ms 346528 KB 
#include <bits/stdc++.h>
#include "factories.h"
 
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
 
const int maxn = 5e5 + 5;
 
int n, del[maxn], sub[maxn];
ll dist[maxn];
vector<vector<pll> > graph(maxn), anc(maxn);
 
int get_sub(int u, int p) {
    sub[u] = 1;
    for(auto &[v, _] : graph[u]) {
        if(v == p || del[v]) continue;
        sub[u] += get_sub(v, u);
    }
    return sub[u];
}
 
int get_cen(int u, int p, int sz) {
    for(auto &[v, _] : graph[u]) {
        if(v == p || del[v]) continue;
        if(2 * sub[v] > sz) return get_cen(v, u, sz);
    }
    return u;
}
 
void get_dist(int u, int cen, int p, ll d) {
    for(auto &[v, w] : graph[u]) {
        if(v == p || del[v]) continue;
        get_dist(v, cen, u, d + w);
    }
    anc[u].push_back({ cen, d });
}
 
void update(int u, int t) {
    for(auto &[v, d] : anc[u]) {
        if(t) dist[v] = min(dist[v], d);
        else dist[v] = 1e18;
    }
    dist[u] = (t ? 0 : 1e18);
}
 
ll query(int u) {
    ll ans = dist[u];
    for(auto &[v, d] : anc[u])
        ans = min(ans, d + dist[v]);
    return ans;
}
 
void build(int u) {
    int cen = get_cen(u, -1, get_sub(u, -1));
 
    for(auto &[v, w] : graph[cen]) {
        if(del[v]) continue;
        get_dist(v, cen, cen, w);
    }
 
    del[cen] = 1;
 
    for(auto &[v, w] : graph[cen]) {
        if(del[v]) continue;
        build(v);
    }
}
 
void Init(int N, int A[], int B[], int D[]) {
    n = N;
    for(int i=0; i<n-1; i++) {
        graph[A[i]].push_back({ B[i], D[i] });
        graph[B[i]].push_back({ A[i], D[i] });
    }
    for(int i=0; i<n; i++) dist[i] = 1e18;
    build(0);
}
 
ll Query(int S, int X[], int T, int Y[]) {
    ll ans = 1e18;
    for(int i=0; i<S; i++) update(X[i], 1);
    for(int i=0; i<T; i++) ans = min(ans, query(Y[i]));
    for(int i=0; i<S; i++) update(X[i], 0);
    return ans;
}

Compilation message

factories.cpp: In function 'int get_sub(int, int)':
factories.cpp:16:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   16 |     for(auto &[v, _] : graph[u]) {
      |               ^
factories.cpp: In function 'int get_cen(int, int, int)':
factories.cpp:24:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   24 |     for(auto &[v, _] : graph[u]) {
      |               ^
factories.cpp: In function 'void get_dist(int, int, int, ll)':
factories.cpp:32:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   32 |     for(auto &[v, w] : graph[u]) {
      |               ^
factories.cpp: In function 'void update(int, int)':
factories.cpp:40:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   40 |     for(auto &[v, d] : anc[u]) {
      |               ^
factories.cpp: In function 'll query(int)':
factories.cpp:49:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   49 |     for(auto &[v, d] : anc[u])
      |               ^
factories.cpp: In function 'void build(int)':
factories.cpp:57:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   57 |     for(auto &[v, w] : graph[cen]) {
      |               ^
factories.cpp:64:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   64 |     for(auto &[v, w] : graph[cen]) {
      |               ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 46472 KB Output is correct
2 Correct 194 ms 49556 KB Output is correct
3 Correct 207 ms 49804 KB Output is correct
4 Correct 204 ms 50000 KB Output is correct
5 Correct 216 ms 50336 KB Output is correct
6 Correct 157 ms 49236 KB Output is correct
7 Correct 206 ms 49800 KB Output is correct
8 Correct 208 ms 50060 KB Output is correct
9 Correct 228 ms 50332 KB Output is correct
10 Correct 149 ms 48796 KB Output is correct
11 Correct 203 ms 49748 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 46428 KB Output is correct
2 Correct 1695 ms 197608 KB Output is correct
3 Correct 2570 ms 253600 KB Output is correct
4 Correct 537 ms 103728 KB Output is correct
5 Correct 3388 ms 346528 KB Output is correct
6 Correct 2631 ms 253628 KB Output is correct
7 Correct 653 ms 92180 KB Output is correct
8 Correct 234 ms 67008 KB Output is correct
9 Correct 748 ms 97440 KB Output is correct
10 Correct 665 ms 92540 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 46472 KB Output is correct
2 Correct 194 ms 49556 KB Output is correct
3 Correct 207 ms 49804 KB Output is correct
4 Correct 204 ms 50000 KB Output is correct
5 Correct 216 ms 50336 KB Output is correct
6 Correct 157 ms 49236 KB Output is correct
7 Correct 206 ms 49800 KB Output is correct
8 Correct 208 ms 50060 KB Output is correct
9 Correct 228 ms 50332 KB Output is correct
10 Correct 149 ms 48796 KB Output is correct
11 Correct 203 ms 49748 KB Output is correct
12 Correct 10 ms 46428 KB Output is correct
13 Correct 1695 ms 197608 KB Output is correct
14 Correct 2570 ms 253600 KB Output is correct
15 Correct 537 ms 103728 KB Output is correct
16 Correct 3388 ms 346528 KB Output is correct
17 Correct 2631 ms 253628 KB Output is correct
18 Correct 653 ms 92180 KB Output is correct
19 Correct 234 ms 67008 KB Output is correct
20 Correct 748 ms 97440 KB Output is correct
21 Correct 665 ms 92540 KB Output is correct
22 Correct 1977 ms 206540 KB Output is correct
23 Correct 2017 ms 211536 KB Output is correct
24 Correct 3137 ms 255236 KB Output is correct
25 Correct 3169 ms 257164 KB Output is correct
26 Correct 2982 ms 256368 KB Output is correct
27 Correct 3916 ms 337612 KB Output is correct
28 Correct 616 ms 94200 KB Output is correct
29 Correct 3121 ms 243428 KB Output is correct
30 Correct 3021 ms 243692 KB Output is correct
31 Correct 3029 ms 243580 KB Output is correct
32 Correct 832 ms 90524 KB Output is correct
33 Correct 222 ms 59904 KB Output is correct
34 Correct 469 ms 75672 KB Output is correct
35 Correct 464 ms 76452 KB Output is correct
36 Correct 648 ms 84560 KB Output is correct
37 Correct 644 ms 84564 KB Output is correct