Submission #567352

#	Time	Username	Problem	Language	Result	Execution time	Memory
567352		physics07	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	57 ms	6180 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    int n=(int)w.size();
    vector<pair<int, int>> v;
    for(int i=0; i<n; i++) v.push_back({w[i], i});
    sort(v.begin(), v.end());
    int left=0, right=0;
    bool b=0;
    ll sum=v[0].first;
    while(left<n && right<n) {
        if(sum>=l && sum<=u) {
            b=1;
            break;
        }
        if(sum<l && right<n-1 || left==right) sum+=v[++right].first;
        else sum-=v[left++].first;
    }
    if(b) {
        vector<int> ans;
        for(int i=left; i<=right; i++) ans.push_back(v[i].second);
        return ans;
    }
    else return vector<int>(0);
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:18:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   18 |         if(sum<l && right<n-1 || left==right) sum+=v[++right].first;
      |            ~~~~~~^~~~~~~~~~~~

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