Submission #572908

#	Time	Username	Problem	Language	Result	Execution time	Memory
572908		MohamedAliSaidane	Art Collections (BOI22_art)	C++17	35 / 100	213 ms	564 KiB

art

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include "art.h"
        using namespace __gnu_pbds;
        using namespace std;

        typedef tree<int,null_type,less<int>,rb_tree_tag,
        tree_order_statistics_node_update> indexed_set;

        typedef long long ll;
        typedef long double ld;

        typedef pair<int,int> pii;
        typedef pair<ll,ll> pll;
        typedef pair<ld,ld> pld;

        typedef vector<int> vi;
        typedef vector<ll> vll;
        typedef vector<pii> vpi;
        typedef vector<pll> vpl;

        #define pb push_back
        #define popb pop_back
        #define pp pop_back
        #define pf push_front
        #define popf pop_front
        #define all(x) (x).begin(),(x).end()
        #define ff first
        #define ss second

        ///#define int ll

        int nx[4] = {0,0,1,-1}, ny[4] = {1,-1,0,0};
        ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;}
        ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);}

        const int nax = 4001;
        int n;
        vi adj[nax];
        unordered_set<int> vis;
        int curcost ;
        bool chng = true;
        vi res;
        int rnk[nax];
        /*int publish(vi a)
        {
            int rep = 0;
            for(int i = 0; i < n ; i++)
            {
                for(int j = 0; j < i ; j++)
                    rep += (rnk[a[i]] < rnk[a[j]]);
            }
            return rep;
        }
        */
        int sup(int x, int g)
        {
            if(x == g)
                return 1;
            vis.insert(x);
            for(auto e: adj[x])
            {
                if(vis.count(e) != 0)
                    continue;
                if(sup(e,g) == 1)
                    return 1;
            }
            return 0;
        }
        bool gr(int a, int b)
        {
            vis.clear();
            if(sup(a,b))
                return true;
            vis.clear();
            if(sup(b,a))
                return false;
            vi perm; perm.pb(a); perm.pb(b);
            for(int i = 1; i <= n; i++)
            {
                if(i != a && i != b)
                    perm.pb(i);
            }
            int c = publish(perm);
            swap(perm[0],perm[1]);
            int d = publish(perm);
            if(d > c)
            {
                adj[a].pb(b);
                return true;
            }
            else
            {
                adj[b].pb(a);
                return false;
            }
        }
        vi merge_sort(vi L, int l, int r)
        {
            int k = (r - l + 1);
            if(k == 1)
                return L;
            vi A = merge_sort(L,l,(l+r)/2);
            vi B = merge_sort(A,(l+r)/2+1,r);
            int i =l, j = (l+r)/2 + 1;
            vi res = B;
            int curi = i;
            while(curi <= r)
            {
                if(i > (l+r)/2 || (j <= r && gr(B[j],B[i])))
                    res[curi++] = B[j++];
                else
                    res[curi++] = B[i++];
            }
            return res;
        }
        void solve(int N)
        {
            n = N;
            vi perm;
            for(int i = 1 ;i <= n; i ++)
                perm.pb(i);
            answer(merge_sort(perm, 0, N - 1));
        }
        /*
        int main()
        {
            ios::sync_with_stdio(false);
            cin.tie(0); cout.tie(0);
            int N; cin >> N;
            for(int i = 0; i < N; i ++)
            {
                int x; cin >> x;
                res.pb(x);
                rnk[x] = i;
            }
            vi u = solve(N);
            for(auto e: u)
                cout << e << ' ' ;
        }
        */

Compilation message (stderr)

interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30