oj.uz

Submission #626568

# Submission time Handle Problem Language Result Execution time Memory
626568 2022-08-11T14:38:54 Z tamthegod Paths (RMI21_paths) C++14
68 / 100
 328 ms 38156 KB 
#include<bits/stdc++.h>

#define int long long
#define pb push_back
#define fi first
#define se second
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e6 + 5;
const int mod = 1e9 + 7;
const ll oo = 1e18;
int n, k;
vector<pair<int, int>> adj[maxN];
int f[maxN], dp[maxN];
void ReadInput()
{
    cin >> n >> k;
    for(int i=1; i<n; i++)
    {
        int u, v, w;
        cin >> u >> v >> w;
        adj[u].pb({v, w});
        adj[v].pb({u, w});
    }
}
void predfs(int u, int par)
{
    for(auto a : adj[u])
    {
        int v = a.fi, w = a.se;
        if(v == par) continue;
        predfs(v, u);
        f[u] = max(f[u], f[v] + w);
    }
}
void predfs1(int u, int par)
{
    vector<pair<int, int>> vc;
    for(auto a : adj[u])
    {
        int v = a.fi, w = a.se;
        if(v == par) continue;
        vc.pb({f[v] + w, v});
    }
    sort(vc.begin(), vc.end(), greater<pair<int, int>>());
    for(auto a : adj[u])
    {
        int v = a.fi, w = a.se;
        if(v == par) continue;
        if(v != vc[0].se) dp[v] = max(dp[u] + w, vc[0].fi + w);
        else dp[v] = max(dp[u] + w, vc[1].fi + w);
        predfs1(v, u);
    }
}
multiset<int, greater<int>> s, s1;
void dfs(int u, int par, int root)
{
    int _max = 0, id = 0;
    for(auto a : adj[u])
    {
        int v = a.fi, w = a.se;
        if(v == par) continue;
        dfs(v, u, root);
        if(f[v] + w > _max)
        {
            _max = f[v] + w;
            id = v;
        }
    }
   // cout << u << " " << _max << "\n";
    for(auto a : adj[u])
    {
        int v = a.fi, w = a.se;
        if(v == par || v == id) continue;
        s.insert(f[v] + w);
    }
    if(u == root) s.insert(f[u]);
}
int res[maxN], sum = 0;
void add(int val)
{
    if(s.size() < k)
    {
        s.insert(val);
        sum += val;
        return;
    }
    auto it = s.end();
    it--;
    if(*it < val)
    {
        sum -= *it;
        sum += val;
        s1.insert(*it);
        s.insert(val);
        s.erase(it);
    }
    else s1.insert(val);
}
void del(int val)
{
    if(s.find(val) != s.end())
    {
        sum -= val;
        s.erase(s.find(val));
        if(s1.empty()) return;
        auto it = s1.begin();
        sum += *it;
        s.insert(*it);
        s1.erase(it);
    }
    else if(s1.find(val) != s1.end()) s1.erase(s1.find(val));
}
void reroot(int u, int par)
{
    res[u] = sum;
    for(auto a : adj[u])
    {
        int v = a.fi, w = a.se;
        if(v == par) continue;
        add(f[v]);
        del(f[v] + w);
        add(dp[v]);
        del(dp[v] - w);
        reroot(v, u);
        add(f[v] + w);
        del(f[v]);
        add(dp[v] - w);
        del(dp[v]);
    }
}
void Solve()
{
    predfs(n, 0);
    predfs1(n, 0);
    dfs(n, 0, n);
    for(int v : s) sum += v;
    while(s.size() > k)
    {
        auto it = s.end();
        it--;
        sum -= *it;
        s1.insert(*it);
        s.erase(it);
    }
    //for(int v : s1) cout << v << " ";return;
    reroot(n, 0);
    for(int i=1; i<=n; i++) cout << res[i] << '\n';
}
int32_t main()
{
   // freopen("x.inp", "r", stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    ReadInput();
    Solve();
}

Compilation message

Main.cpp: In function 'void add(long long int)':
Main.cpp:85:17: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int, std::greater<long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   85 |     if(s.size() < k)
      |        ~~~~~~~~~^~~
Main.cpp: In function 'void Solve()':
Main.cpp:141:20: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int, std::greater<long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  141 |     while(s.size() > k)
      |           ~~~~~~~~~^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23764 KB Output is correct
2 Correct 16 ms 23816 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23764 KB Output is correct
2 Correct 16 ms 23816 KB Output is correct
3 Correct 12 ms 23796 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 13 ms 23808 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23764 KB Output is correct
2 Correct 16 ms 23816 KB Output is correct
3 Correct 12 ms 23796 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 13 ms 23808 KB Output is correct
8 Correct 14 ms 23892 KB Output is correct
9 Correct 18 ms 23940 KB Output is correct
10 Correct 14 ms 23908 KB Output is correct
11 Correct 18 ms 23904 KB Output is correct
12 Correct 15 ms 23828 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23764 KB Output is correct
2 Correct 16 ms 23816 KB Output is correct
3 Correct 12 ms 23796 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 13 ms 23808 KB Output is correct
8 Correct 14 ms 23892 KB Output is correct
9 Correct 18 ms 23940 KB Output is correct
10 Correct 14 ms 23908 KB Output is correct
11 Correct 18 ms 23904 KB Output is correct
12 Correct 15 ms 23828 KB Output is correct
13 Correct 15 ms 24040 KB Output is correct
14 Correct 15 ms 24148 KB Output is correct
15 Correct 15 ms 23940 KB Output is correct
16 Correct 16 ms 24028 KB Output is correct
17 Correct 17 ms 24020 KB Output is correct
18 Correct 18 ms 23916 KB Output is correct
19 Correct 20 ms 24040 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 284 ms 34756 KB Output is correct
2 Correct 278 ms 36508 KB Output is correct
3 Correct 166 ms 32740 KB Output is correct
4 Correct 271 ms 34832 KB Output is correct
5 Correct 283 ms 36356 KB Output is correct
6 Correct 249 ms 34784 KB Output is correct

Subtask #6
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23764 KB Output is correct
2 Correct 16 ms 23816 KB Output is correct
3 Correct 12 ms 23796 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 13 ms 23808 KB Output is correct
8 Correct 14 ms 23892 KB Output is correct
9 Correct 18 ms 23940 KB Output is correct
10 Correct 14 ms 23908 KB Output is correct
11 Correct 18 ms 23904 KB Output is correct
12 Correct 15 ms 23828 KB Output is correct
13 Correct 15 ms 24040 KB Output is correct
14 Correct 15 ms 24148 KB Output is correct
15 Correct 15 ms 23940 KB Output is correct
16 Correct 16 ms 24028 KB Output is correct
17 Correct 17 ms 24020 KB Output is correct
18 Correct 18 ms 23916 KB Output is correct
19 Correct 20 ms 24040 KB Output is correct
20 Correct 284 ms 34756 KB Output is correct
21 Correct 278 ms 36508 KB Output is correct
22 Correct 166 ms 32740 KB Output is correct
23 Correct 271 ms 34832 KB Output is correct
24 Correct 283 ms 36356 KB Output is correct
25 Correct 249 ms 34784 KB Output is correct
26 Correct 324 ms 35116 KB Output is correct
27 Correct 328 ms 37632 KB Output is correct
28 Incorrect 275 ms 38156 KB Output isn't correct
29 Halted 0 ms 0 KB -