oj.uz

Submission #626559

# Submission time Handle Problem Language Result Execution time Memory
626559 2022-08-11T14:34:25 Z tamthegod Paths (RMI21_paths) C++14
68 / 100
 280 ms 38208 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.erase(it);
        s.insert(val);
    }
    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;
        sum += *s1.begin();
        s.insert(*s1.begin());
        s1.erase(s1.begin());
    }
    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:140:20: 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]
  140 |     while(s.size() > k)
      |           ~~~~~~~~~^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23836 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 14 ms 23816 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 14 ms 23844 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23836 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 14 ms 23816 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 14 ms 23844 KB Output is correct
8 Correct 13 ms 23892 KB Output is correct
9 Correct 13 ms 23892 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 14 ms 23952 KB Output is correct
12 Correct 14 ms 23896 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23836 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 14 ms 23816 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 14 ms 23844 KB Output is correct
8 Correct 13 ms 23892 KB Output is correct
9 Correct 13 ms 23892 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 14 ms 23952 KB Output is correct
12 Correct 14 ms 23896 KB Output is correct
13 Correct 15 ms 24020 KB Output is correct
14 Correct 15 ms 24148 KB Output is correct
15 Correct 14 ms 24048 KB Output is correct
16 Correct 15 ms 24044 KB Output is correct
17 Correct 15 ms 23960 KB Output is correct
18 Correct 15 ms 23988 KB Output is correct
19 Correct 15 ms 24020 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 225 ms 34744 KB Output is correct
2 Correct 255 ms 36516 KB Output is correct
3 Correct 144 ms 32712 KB Output is correct
4 Correct 216 ms 34744 KB Output is correct
5 Correct 221 ms 36560 KB Output is correct
6 Correct 214 ms 34776 KB Output is correct

Subtask #6
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23836 KB Output is correct
4 Correct 12 ms 23764 KB Output is correct
5 Correct 14 ms 23816 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 14 ms 23844 KB Output is correct
8 Correct 13 ms 23892 KB Output is correct
9 Correct 13 ms 23892 KB Output is correct
10 Correct 13 ms 23892 KB Output is correct
11 Correct 14 ms 23952 KB Output is correct
12 Correct 14 ms 23896 KB Output is correct
13 Correct 15 ms 24020 KB Output is correct
14 Correct 15 ms 24148 KB Output is correct
15 Correct 14 ms 24048 KB Output is correct
16 Correct 15 ms 24044 KB Output is correct
17 Correct 15 ms 23960 KB Output is correct
18 Correct 15 ms 23988 KB Output is correct
19 Correct 15 ms 24020 KB Output is correct
20 Correct 225 ms 34744 KB Output is correct
21 Correct 255 ms 36516 KB Output is correct
22 Correct 144 ms 32712 KB Output is correct
23 Correct 216 ms 34744 KB Output is correct
24 Correct 221 ms 36560 KB Output is correct
25 Correct 214 ms 34776 KB Output is correct
26 Correct 280 ms 35124 KB Output is correct
27 Correct 254 ms 37584 KB Output is correct
28 Incorrect 269 ms 38208 KB Output isn't correct
29 Halted 0 ms 0 KB -