Submission #537470

#	Time	Username	Problem	Language	Result	Execution time	Memory
537470		maomao90	Paths (RMI21_paths)	C++17	36 / 100	1088 ms	13504 KiB

Main

// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define MP make_pair
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define MT make_tuple
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

#define INF 1000000005
#define LINF 1000000000000000005ll
#define MAXN 100005

int n, k;
vii adj[MAXN];

multiset<ll, greater<ll>> dp[MAXN];
void dfs(int u, int p) {
    dp[u].clear();
    for (auto [v, w] : adj[u]) {
        if (v == p) continue;
        dfs(v, u);
        ll x = *dp[v].begin(); dp[v].erase(dp[v].begin());
        dp[v].insert(x + w);
        if (dp[u].size() < dp[v].size()) {
            swap(dp[u], dp[v]);
        }
        for (ll x : dp[v]) {
            dp[u].insert(x);
        }
        while (dp[u].size() > k) {
            dp[u].erase(prev(dp[u].end()));
        }
    }
    if (dp[u].empty()) {
        dp[u].insert(0);
    }
}

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> n >> k;
    REP (i, 1, n) {
        int a, b, c; cin >> a >> b >> c;
        adj[a].pb(MP(b, c));
        adj[b].pb(MP(a, c));
    }
    REP (i, 1, n + 1) {
        dfs(i, -1);
        ll ans = 0;
        int tk = k;
        for (ll x : dp[i]) {
            ans += x;
        }
        cout << ans << '\n';
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void dfs(int, int)':
Main.cpp:55:29: 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 'int' [-Wsign-compare]
   55 |         while (dp[u].size() > k) {
      |                ~~~~~~~~~~~~~^~~
Main.cpp: In function 'int main()':
Main.cpp:77:13: warning: unused variable 'tk' [-Wunused-variable]
   77 |         int tk = k;
      |             ^~

• Subtask 1: 8 / 8
• Subtask 2: 11 / 11
• Subtask 3: 17 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 12
• Subtask 6: 0 / 32