Submission #947135

#	Time	Username	Problem	Language	Result	Execution time	Memory
947135		steveonalex	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	51 ms	4952 KiB

molecules

#include <bits/stdc++.h>
#include "molecules.h"
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }


vector<int> find_subset(int l, int r, vector<int> w) {
    int n = w.size();
    if (r < w[0]) return vector<int>(0);
    vector<int> pos(n);
    for(int i = 0; i<n; ++i) pos[i] = i;
    sort(ALL(pos), [&w] (int a, int b){return w[a] < w[b];});
    sort(ALL(w));
    ll s = 0;
    for(int i: w) s += i;

    if (s < l) return vector<int>(0);

    ll delta = 0;
    for(int i= 0; i<n; ++i){
        if (s >= l && s - delta <= r){
            vector<int> ans;
            for(int j = i; j<n; ++j) ans.push_back(j);

            reverse(ALL(ans));
            for(int j = 0; j < i; ++j){
                if (s <= r) break;
                s -= w[n - j - 1] - w[j];
                ans[j] = n - ans[j] - 1;
            }
            for(int &j: ans) j = pos[j];
            sort(ALL(ans));
            return ans;
        }
        delta += w[n - i - 1] - w[i];
        s -= w[i];
    }

    return vector<int>(0);
}


// int main(void){
//     ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
//     vector<int> ans = find_subset(50, 51, {11, 10, 11, 10, 11, 10, 10});
//     printArr(ans);
 
//     return 0;
// }

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