Submission #1266973

#TimeUsernameProblemLanguageResultExecution timeMemory
1266973_llHarbingers (CEOI09_harbingers)C++20
100 / 100
73 ms20552 KiB
#include<bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; vector<array<ll, 2>> g[100000]; array<ll, 2> ps[100000], all[100000]; ll oo = 1e14, re[100000]; ld xinter(array<ll, 2> a, array<ll, 2> b){ return ((ld) b[1] - a[1]) / ((ld) a[0] - b[0]); } ll vl(ll id, ll x){ ll l = 1, r = id - 2; while(l <= r){ ll m = (l + r) / 2; if(x <= xinter(ps[m], ps[m + 1])) r = m - 1; else l = m + 1; } return ps[l][0] * x + ps[l][1]; } ll ins(ll id, array<ll, 2> at){ if(id < 3) return id; ll l = 2, r = id; while(l <= r){ ll m = (l + r) / 2; if(xinter(ps[m - 1], at) <= xinter(ps[m - 1], ps[m])) r = m - 1; else l = m + 1; } return min(l, id); } void dfs(ll p, ll at, ll del, ll id){ ll res = vl(id, all[at][1]), c = all[at][0] + all[at][1] * del; re[at] = res + c; id = ins(id, {-del, res + c}); array<ll, 2> aux = ps[id]; ps[id] = {-del, res + c}; for(auto [i, j] : g[at]) if(i != p) dfs(at, i, del + j, id + 1); ps[id] = aux; } int main(){ ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); ll n; cin >> n; for(int i = 1, a, b, c; i < n; i++){ cin >> a >> b >> c; a--, b--; g[a].push_back({b, c}); g[b].push_back({a, c}); } for(ll i = 1; i < n; i++) cin >> all[i][0] >> all[i][1]; ps[0] = {1, 0}; dfs(-1, 0, 0, 1); for(ll i = 1; i < n; i++) cout << re[i] << " "; cout << "\n"; }
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