Submission #706836

#	Time	Username	Problem	Language	Result	Execution time	Memory
706836		AdamGS	Job Scheduling (IOI19_job)	C++17	5 / 100	90 ms	48916 KiB

job

#include "job.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=2e5+7;
vector<int>V[LIM];
ll dp[LIM], sumu[LIM], sumczas[LIM], n;
bool srt(pair<ll,ll>a, pair<ll,ll>b) {
    return a.st*b.nd-a.nd*b.st<0;
}
void DFS(int x) {
    ll a=sumczas[x];
    vector<pair<ll,ll>>P;
    for(auto i : V[x]) {
        DFS(i);
        P.pb({sumczas[i], sumu[i]});
        sumu[x]+=sumu[i];
        sumczas[x]+=sumczas[i];
        dp[x]+=dp[i];
    }
    sort(P.begin(), P.end(), srt);
    ll akt=0;
    for(int i=P.size()-1; i>=0; --i) {
        dp[x]+=P[i].nd*akt;
        akt+=P[i].st;
    }
    dp[x]+=a*sumu[x];
}
ll scheduling_cost(vector<int>P, vector<int>U, vector<int>D) {
    n=P.size();
    rep(i, n-1) V[P[i+1]].pb(i+1);
    rep(i, n) {
        sumu[i]=U[i];
        sumczas[i]=D[i];
    }
    DFS(0);
    return dp[0];
}

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