結果
| 問題 |
No.2523 Trick Flower
|
| コンテスト | |
| ユーザー |
apricity
|
| 提出日時 | 2023-12-15 12:00:33 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,355 bytes |
| コンパイル時間 | 1,566 ms |
| コンパイル使用メモリ | 135,132 KB |
| 最終ジャッジ日時 | 2025-02-18 11:21:12 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 8 WA * 23 |
ソースコード
#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<numeric>
#include<cmath>
#include<utility>
#include<tuple>
#include<cstdint>
#include<cstdio>
#include<iomanip>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<deque>
#include<unordered_map>
#include<unordered_set>
#include<bitset>
#include<cctype>
#include<chrono>
#include<random>
#include<cassert>
#include<cstddef>
#include<iterator>
#include<string_view>
#include<type_traits>
#ifdef LOCAL
# include "debug_print.hpp"
# define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
# define debug(...) (static_cast<void>(0))
#endif
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
#define rrep(i,n) for(int i=(n)-1; i>=0; i--)
#define FOR(i,a,b) for(int i=(a); i<(b); i++)
#define RFOR(i,a,b) for(int i=(b-1); i>=(a); i--)
#define ALL(v) v.begin(), v.end()
#define RALL(v) v.rbegin(), v.rend()
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );
#define pb push_back
using ll = long long;
using D = double;
using LD = long double;
using P = pair<int, int>;
template<typename T> using PQ = priority_queue<T,vector<T>>;
template<typename T> using minPQ = priority_queue<T, vector<T>, greater<T>>;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
void yesno(bool flag) {cout << (flag?"Yes":"No") << "\n";}
template<typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
os << p.first << " " << p.second;
return os;
}
template<typename T, typename U>
istream &operator>>(istream &is, pair<T, U> &p) {
is >> p.first >> p.second;
return is;
}
template<typename T>
ostream &operator<<(ostream &os, const vector<T> &v) {
int s = (int)v.size();
for (int i = 0; i < s; i++) os << (i ? " " : "") << v[i];
return os;
}
template<typename T>
istream &operator>>(istream &is, vector<T> &v) {
for (auto &x : v) is >> x;
return is;
}
void in() {}
template<typename T, class... U>
void in(T &t, U &...u) {
cin >> t;
in(u...);
}
void out() { cout << "\n"; }
template<typename T, class... U, char sep = ' '>
void out(const T &t, const U &...u) {
cout << t;
if (sizeof...(u)) cout << sep;
out(u...);
}
void outr() {}
template<typename T, class... U, char sep = ' '>
void outr(const T &t, const U &...u) {
cout << t;
outr(u...);
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int n; in(n);
vector<ll> a(n), b(n), c(n); in(a,b,c);
rep(i,n) c[i]--;
vector<int> seen(n,false);
vector<int> loop(n,-1);
vector<int> ord;
vector<int> ind(n);
vector<int> par(n,-1);
vector<ll> sa_lp(n);
vector<ll> sb_lp(n);
rep(i,n) ind[c[i]]++;
rep(i,n){
if(seen[i]) continue;
int now = i;
do{
seen[now] = true;
now = c[now];
}while(!seen[now]);
int piv = now;
while(loop[now] == -1){
sa_lp[piv] += a[now];
sb_lp[piv] += b[now];
par[now] = piv;
loop[now] = 1;
now = c[now];
}
now = i;
while(loop[now] == -1){
loop[now] = 0;
now = c[now];
}
}
rep(i,n) if(loop[i] == 0) sa_lp[i] = a[i], sb_lp[i] = b[i];
queue<int> q;
rep(i,n) if(ind[i] == 0) q.push(i);
while(q.size()){
int x = q.front(); q.pop();
ord.pb(x);
int y = c[x];
if(loop[y]){
ord.pb(par[y]);
}
else{
ind[y]--;
if(ind[y] == 0) q.push(y);
}
}
// out(loop);
// out(ord);
ll ok = 0, ng = 1e15;
vector<ll> f(n);
while(ng-ok > 1){
ll mid = (ok+ng)/2;
f = sa_lp;
int chk = 1;
for(int x : ord){
if(!chk) break;
if(f[x] < mid*sb_lp[x]){
int y = c[x];
f[y] -= mid*sb_lp[x]-f[x];
if(f[y] < 0) {
chk = 0;
break;
}
}
}
rep(i,n) if(loop[i] == 1){
if(f[par[i]] < mid*sb_lp[par[i]]) chk = 0;
}
if(chk) ok = mid;
else ng = mid;
}
out(ok);
}
apricity