Submission #1023642

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023642		vjudge1	Detecting Molecules (IOI16_molecules)	C++17	0 / 100	1 ms	348 KiB

molecules

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define nl "\n"
#define pi pair<int, int>
#define mp make_pair
#define ff first
#define ss second

vector<int> find_subset(int l, int u, vector<int> w){
	ll n = w.size();
	vector<pi> num(n+5, mp(0, 0));
	for (ll i=0; i<w.size(); i++) num[i] = mp(w[i], i);
	sort(num.begin(), num.end());
	ll sum = 0, start = 0;
	while(start<n && sum<l){
		sum += num[start].ff;
		start++;
	}
	if (sum<l) return {};
	ll front=-1, back=-1;
	if(sum>=l && sum<=u){
		front = 0;
		back = start-1;
	}
	else{
		ll size = start-1; // 0 to start-2
		sum -= num[start-1].ff;
		for (ll i=start-1; i<n; i++){
			sum -= num[i-size].ff;
			sum += num[i].ff;
			if(sum>=l && sum<=u){
				front = i-size+1;
				back = i;
				break;
			}
		}
	}
	vector<int> v;
	if(front==-1 && back==-1) return v;
	for (ll i=front; i<=back; i++){
		v.push_back(num[i].ss);
	}
	return v;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:13:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for (ll i=0; i<w.size(); i++) num[i] = mp(w[i], i);
      |               ~^~~~~~~~~

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