Submission #744353

#	Time	Username	Problem	Language	Result	Execution time	Memory
744353		Dan4Life	Detecting Molecules (IOI16_molecules)	C++17	0 / 100	51 ms	65536 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
using ll = long long;
const int mxN = (int)2e5+10;
ll pre[mxN];
/*
4 15 17
6 8 8 7
*/
vector<int> find_subset(int L, int R, vector<int> w) {
    vector<pair<int,int>> v; v.clear();
    for(int i = 1; auto u : w) v.pb({u,i++});
    sort(all(v)); int n = sz(v); pre[0]=0;
    for(int i = 0; i < n; i++)
        pre[i+1] = pre[i]+(ll)v[i].first;
    vector<int> ans; ans.clear();
    for(int i = 0; i < n; i++){
        int l = i+1, r = n;
        if(pre[r]-pre[i]<L) continue;
        while(l<r){
            int mid = (l+r)/2;
            ll sum = pre[mid]-pre[i];
            if(sum<(ll)L) l=mid+1;
            else r=mid;
        }
        ll sum = pre[l]-pre[i];
        if(L<=sum and sum<=R){
            for(int j = i; j < l; i++) ans.pb(v[j].second);
            return ans;
        }
    }
    return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:16:20: warning: range-based 'for' loops with initializer only available with '-std=c++2a' or '-std=gnu++2a'
   16 |     for(int i = 1; auto u : w) v.pb({u,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