Submission #145220

#	Time	Username	Problem	Language	Result	Execution time	Memory
145220		mat_v	Detecting Molecules (IOI16_molecules)	C++14	9 / 100	3 ms	376 KiB

molecules

#include <cstdio>
#include <vector>
#include <cassert>
#include <bits/stdc++.h>
#include "molecules.h"
#define maxn 200005
using namespace std;
typedef long long ll;

int n;
ll pref[maxn];
ll suff[maxn];
int a,b;
bool dobar(ll x){
    if(x >=a && x<=b)return 1;
    return 0;
}
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    sort(w.begin(), w.end());
    n = w.size();
    ll tren = 0;
    a = l;
    b = u;
    for(int i=0; i<n; i++){
        tren += w[i];
        pref[i + 1] = tren;
    }
    if(dobar(pref[n])){
        vector<int> rez;
        for(int i=0; i<n; i++)rez.push_back(i);
        return rez;
    }
    vector<int>v;
    if(pref[n] < l)return v;
    tren = 0;
    for(int i=n-1; i>=0; i--){
        tren += w[i];
        suff[n - i] = tren;
    }
    int levo = n,d = 0;
    bool ima = 0;
    for(int i=0; i<=n; i++){
        if(ima)break;
        ll sum = suff[i];
        d = i;
        if(sum > u)break;
        if(dobar(sum + pref[levo])){
            ima = 1;
            break;
        }
        if(ima)break;
        while(sum + pref[levo] > u){
            if(dobar(sum  + pref[levo])){
                ima = 1;
                break;
            }
            if(ima)break;
            levo--;
        }
        if(ima)break;
        if(dobar(sum + pref[levo])){
            ima = 1;
            break;
        }
        if(ima)break;
    }
    vector<int>rez;
    if(!ima){
        return rez;
    }
    int koji = n - d;
    for(int i=1; i<=levo; i++)rez.push_back(i-1);
    for(int i=n-1; i>=koji; i--)rez.push_back(i);
    return rez;
}

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