Submission #341902

#	Time	Username	Problem	Language	Result	Execution time	Memory
341902		DrearyJoke	Detecting Molecules (IOI16_molecules)	C++17	9 / 100	1 ms	384 KiB

molecules

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include "molecules.h"
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ll> vll;
typedef vector<vector<ll>> vvll;
typedef vector<bool> vb;
typedef tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;

template <typename T, typename U> std::istream&operator>>(std::istream&i, pair<T,U>&p) {i >> p.x >> p.y; return i;}
template<typename T>std::istream&operator>>(std::istream&i,vector<T>&t) {for(auto&v:t){i>>v;}return i;}
template <typename T, typename U> std::ostream&operator<<(std::ostream&o, const pair<T,U>&p) {o << p.x << ' ' << p.y; return o;}
template<typename T>std::ostream&operator<<(std::ostream&o,const vector<T>&t) {if(t.empty())o<<'\n';for(size_t i=0;i<t.size();++i){o<<t[i]<<" \n"[i == t.size()-1];}return o;}

#define deb(x) cout << '>' << #x << ':' << x << endl;
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define END '\n'
#define inf 9e18
#define ff first
#define ss second
#define pb push_back

std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    int n = w.size();
    vector<pair<ll, int>> A(n);
    for (int i = 0; i < n; ++i) A[i] = {w[i], i};
    sort(all(A));
    auto it = lower_bound(all(A), pair<ll, int>(l, 0));
    vi ans;
    if (it != A.end() && it->ff >= l && it->ff <= u) {
        ans.pb(it->ss);
        return ans;
    }
    int lo = 0, hi;
    if (it == A.end() || it->ff > u) hi = (it - A.begin());
    // cout << hi << END;
    ll sum = 0;
    set<int> s;
    for (int i = 0; i < hi; ++i) {
        sum += A[i].ff;
        s.insert(A[i].ss);
        if (sum >= l && sum <= u) {
            for (auto u: s) ans.pb(u);
            return ans;
        }
        if (sum > u) {
            for (int j = 0; j < i; ++j) {
                ll nsum = sum - A[j].ff;
                if (nsum >= l && nsum <= u) {
                    s.erase(A[j].ss);
                    for (auto u: s) ans.pb(u);
                    return ans;
                }
            }
        }
    }
    return ans;
}


// void solve(){

// }
// int main()
// {
//     ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
//     int t = 1;
//     cin >> t;
//     while(t--){
//         solve();
//     }
//     return 0;
// }

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:42:9: warning: unused variable 'lo' [-Wunused-variable]
   42 |     int lo = 0, hi;
      |         ^~
molecules.cpp:47:23: warning: 'hi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   47 |     for (int i = 0; i < hi; ++i) {
      |                     ~~^~~~

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