Submission #1185984

#	Time	Username	Problem	Language	Result	Execution time	Memory
1185984		g4yuhg	Factories (JOI14_factories)	C++20	Compilation error	0 ms	0 KiB

factories

#include<bits/stdc++.h>
typedef long long ll;
#define fi first
#define se second
#define pii pair<ll,ll>
#define N 500005
#define endl '\n'
#define inf 1e9
using namespace std;
ll n, m, del[N], child[N], high[N], ne[N], d[N];
vector<pii> adj[N];
vector<pii> par[N];
void cnt_child(ll u, ll parent) {
    child[u] = 1;
    for (auto v : adj[u]) {
        if (v.fi == parent || del[v.fi]) continue;
        cnt_child(v.fi, u);
        child[u] += child[v.fi];
    }
}
ll centroid(ll u, ll parent, ll n) {
    for (auto v : adj[u]) {
        if (v.fi == parent || del[v.fi]) continue;
        if (child[v.fi] > n / 2) {
            return centroid(v.fi, u, n);
        }
    }
    return u;
} 
void dfs(ll u, ll parent, ll r) {
    par[u].push_back({r, d[u]});
    for (auto v : adj[u]) {
        if (v.fi == parent || del[v.fi]) continue;
        high[v.fi] = high[u] + 1;
        d[v.fi] = d[u] + v.se;
        dfs(v.fi, u, r);
    }
}
void solve(ll u) {
    cnt_child(u, u);
    ll x = centroid(u, u, child[u]);
    high[x] = 0;
    d[x] = 0;
    dfs(x, x, x);
    del[x] = 1;
    for (auto v : adj[x]) {
        if (del[v.fi]) continue;
        solve(v.fi);
    }
}
signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= n - 1; i ++) {
        ll u, v, w;
        cin >> u >> v >> w;
        adj[u].push_back({v, w});
        adj[v].push_back({u, w});
    }
    solve(0);
    for (int i = 0; i < n; i ++) {
        ne[i] = inf;
    }
    for (int i = 1; i <= m; i ++) {
        ll s, t;
        cin >> s >> t;
        for (int j = 1; j <= s; j ++) {
            ll u;
            cin >> u;
            high[j] = u;
            for (auto p : par[u]) {
                ne[p.fi] = min(ne[p.fi], p.se);
            }
        }
        ll res = inf;
        for (int j = 1; j <= t; j ++) {
            ll u; cin >> u;
            for (auto p : par[u]) {
                res = min(res, p.se + ne[p.fi]);
            }
        }
        cout << res << endl;
        for (int j = 1; j <= s; j ++) {
            ll u = high[j];
            for (auto p : par[u]) {
                ne[p.fi] = inf;
            }
        }
    }
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc2Zmbma.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccFKvcV5.o:factories.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cc2Zmbma.o: in function `main':
grader.cpp:(.text.startup+0x3d5): undefined reference to `Init(int, int*, int*, int*)'
/usr/bin/ld: grader.cpp:(.text.startup+0x468): undefined reference to `Query(int, int*, int, int*)'
collect2: error: ld returned 1 exit status