Submission #1141345

#	Time	Username	Problem	Language	Result	Execution time	Memory
1141345		harry_tm_18	Detecting Molecules (IOI16_molecules)	C++20	0 / 100	97 ms	131072 KiB

molecules

    #include "molecules.h" 
    #include <bits/stdc++.h>
    using namespace std;
    
    #define ll long long

    vector<int> find_subset(int l, int u, vector<int> w){

        int n = w.size();
        vector<pair<int,int>> a;

        for(int i=0; i<n; ++i){   
            a.emplace_back(w[i],i);
        }
        sort(a.begin(), a.end());

        vector<ll> suffix(n);
        vector<int> ans;
        suffix[n-1] = a[n-1].first;

        for(int i=n-2; i>=0; --i){
            suffix[i] = suffix[i+1] + a[i].first;
        } 

        ll prefixSum = 0;

        for(int i=0; i<n; ++i){
            if(prefixSum > u) break;
            if(prefixSum <= l){
                for(int j=0; j<=i; ++i){
                    ans.push_back(a[j].second);
                }
                return ans;
            }

            ll v = i, g = n-1;

            while(v <= g){
                int mid = v + (g - v) / 2;
                ll sum = prefixSum + suffix[mid];

                if(sum >= l && sum <= u){
                    for(int j=0; j<i; ++j){
                        ans.push_back(a[j].second);
                    }
                    for(int j=mid+1; j<n; ++j){
                        ans.push_back(a[j].second);
                    }
                    return ans;
                } else if(sum > u){
                    v = mid + 1;
                } else {
                    g = mid - 1;
                }
            }
            prefixSum += a[i].first;
        }

        return ans;
    }

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