Submission #585974

#	Time	Username	Problem	Language	Result	Execution time	Memory
585974		Valters07	Detecting Molecules (IOI16_molecules)	C++14	0 / 100	1 ms	300 KiB

molecules

#include <bits/stdc++.h>
#include "molecules.h"
#pragma GCC optimize("O2,unroll-loops")
#define fio ios_base::sync_with_stdio(0);cin.tie(0);
#define ll long long
#define en cin.close();return 0;
#define pb push_back
#define fi first//printf("%lli\n",cur);
#define se second//scanf("%lli",&n);
#define r0 return 0;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
vector<int> find_subset(int l, int u, vector<int> inp)
{
    int n = inp.size();
    ll pf[n+1], sf[n+2];
    vector<pair<int,int> > w(n);
    for(int i = 0;i<n;i++)
        w[i]={inp[i],i};
    sort(w.begin(),w.end());
    pf[0]=sf[n+1]=0;
    for(int i = 1;i<=n;i++)
        pf[i]=pf[i-1]+w[i-1].fi,
        sf[n-i+1]=sf[n-i+2]+w[n-i].fi;
    if(pf[n]<l||u<pf[1])
        return {};
    for(int i = 1;i<=n;i++)
        if(l<=pf[i]&&pf[i]<=u)
            return {w[i].se};
    int k = 1;
    while(k<n&&pf[k+1]<l)
        k++;
    if(sf[n-k+1]<l)
        return {};
    vector<int> ans(k);
    for(int i = 0;i<k;i++)
        ans[i]=w[i].se;
    ll cur = pf[k];
    for(int i = 1;cur<l;i++)
        cur-=w[i-1].fi,
        cur+=w[n-i].fi,
        ans[i-1]=w[n-i].se;
    sort(ans.begin(),ans.end());//style points
    return ans;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31