Submission #1304265

#	Time	Username	Problem	Language	Result	Execution time	Memory
1304265		Johan	Detecting Molecules (IOI16_molecules)	C++20	69 / 100	1095 ms	4500 KiB

molecules

#include "molecules.h"
#include "bits/stdc++.h"
using namespace std;
const int N = 2e5 + 5;
int pr[N];
int get(int l, int r){
	if(l == 0)return pr[r];
	return pr[r] - pr[l - 1];
}
vector < int > find_subset(int l, int u, vector < int > w){
	int n = w.size();
	map < int , vector < int > > id;
	pr[0] = w[0];
	for(int i = 1; i < n; i++)
		pr[i] = pr[i - 1] + w[i];
	for(int i = 0; i < w.size(); i++)
		id[w[i]].push_back(i);
	sort(w.begin(), w.end());
  for(int i = 0; i < n; i++){
		int lo = i, hi = n - 1, j = i;
		while(hi >= lo){
			int mid = (lo + hi) >> 1;
			if(w[mid] - w[i] <= u - l){
				lo = mid + 1;
				j = mid;
			}
			else hi = mid - 1;
		}
		int ans = 0;
		vector < int > y;
		for(int z = i; z <= j; z++){
  		ans += w[z];
  		y.push_back(w[z]);
  		if(ans >= l)break;
		}
		if(ans >= l && ans <= u){
			vector < int > rs;
			for(auto i : y){
				rs.push_back(id[i].back());
				id[i].pop_back();	
			}
			reverse(rs.begin(), rs.end());
			return rs;
		}
	}
	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: 0 / 31