Submission #1299614

#	Time	Username	Problem	Language	Result	Execution time	Memory
1299614		gesp3011v2	Detecting Molecules (IOI16_molecules)	C++20	100 / 100	38 ms	8288 KiB

molecules

#include "bits/stdc++.h"
using namespace std;
#include "molecules.h"
typedef long long ll;

vector<int> find_subset(int l,int u,vector<int> w){
	int n=w.size();
	vector<pair<int,int>> X;
	for(int i=0;i<n;i++)X.push_back({w[i],i});
	sort(X.begin(), X.end());
	int a[n+1],idx[n+1];
	for(int i=0;i<n;i++){
		a[i+1]=X[i].first;
		idx[i+1]=X[i].second;
	}
	ll pref[n+2]={},suf[n+2]={};
	for(int i=1;i<=n;i++){
		pref[i]=pref[i-1];
		pref[i]+=a[i];
	}
	for(int i=n;i>=1;i--){
		suf[i]=suf[i+1];
		suf[i]+=a[i];
	}
	suf[0]=u;
	suf[0]<<=1;
	int R=0;
	for(int L=0;L<=n;L++){
		while(R<=n && (ll)(pref[L]+suf[R])>u)R++;
		ll s=pref[L]+suf[R];
		if(s>=l && s<=u && R>L){
			vector<int> ans;
			for(int i=1;i<=L;i++)ans.push_back(idx[i]);
			for(int i=R;i<=n;i++)ans.push_back(idx[i]);
			return ans;
		}
	}
	return {};
}

Compilation message (stderr)

molecules.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
molecules_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

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