Submission #1160464

#	Time	Username	Problem	Language	Result	Execution time	Memory
1160464		Tymond	Job Scheduling (IOI19_job)	C++20	24 / 100	107 ms	18848 KiB

job

#include "job.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define fi first
#define se second
#define vi vector<int>
#define vll vector<long long>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::high_resolution_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
#ifdef DEBUG
auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";}
#define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X)
#else
#define debug(...){}
#endif

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

struct pair_hash{
  size_t operator()(const pair<int,int>&x)const{
    return hash<long long>()(((long long)x.first)^(((long long)x.second)<<32));
  }
};

ll scheduling_cost(vi p, vi u, vi d){
	int n = sz(p);
	vector<vi> g(n, vi());
	for(int i = 1; i < n; i++){
		g[p[i]].pb(i);
	}

	priority_queue<pair<ld, int>> pq;
	pq.push(mp((ld)u[0] / d[0], 0));
	ll t = 0LL;
	ll ans = 0LL;
	while(sz(pq)){
		pair<ld, int> v = pq.top();
		pq.pop();

		t += d[v.se];
		ans = (ll)ans + t * u[v.se];
		for(auto x : g[v.se]){
			pq.push(mp((ld)u[x] / d[x], x));
		}
	}

	return ans;
}

// int main(){
// 	cout << scheduling_cost({-1, 0, 0}, {5, 2, 5}, {3, 4, 1});
// }

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 0 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 37