Submission #70971

#	Time	Username	Problem	Language	Result	Execution time	Memory
70971		RezwanArefin01	Detecting Molecules (IOI16_molecules)	C++17	46 / 100	322 ms	1680 KiB

molecules

#include <bits/stdc++.h>
using namespace std;

const int N = 10010;
int need[N]; 
vector<int> v; 

vector<int> find_subset(int l, int u, vector<int> w) {
    memset(need, 63, sizeof need);
    need[0] = -1; 
    v.push_back(0);     
    for(int i = 0; i < w.size(); i++) {
        for(int j = 0, sz = v.size(); j < sz; j++) {
            int t = v[j] + w[i]; 
            if(t > u) continue; 
            if(need[t] <= i) continue; 
            need[t] = i; 
            v.push_back(t); 
        }
    }
    sort(v.begin(), v.end()); 
    auto x = lower_bound(v.begin(), v.end(), l); 
    if(x == v.end()) return {}; 
    int X = *x; 
    vector<int> ans; 
    for(int i = w.size() - 1; i >= 0; i--) {
        if(X >= w[i] && need[X - w[i]] < i) {
            X -= w[i]; 
            ans.push_back(i); 
        }
    }
    return ans;  
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:12:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < w.size(); i++) {
                    ~~^~~~~~~~~~

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