Submission #1200019

#	Time	Username	Problem	Language	Result	Execution time	Memory
1200019		irmuun	Amusement Park (CEOI19_amusementpark)	C++20	42 / 100	3068 ms	525704 KiB

amusementpark

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n,m;
    cin>>n>>m;
    ll g[n+5];
    vector<pair<ll,ll>>edge;
    for(ll i=1;i<=m;i++){
        ll a,b;
        cin>>a>>b;
        edge.pb({a,b});
    }
    ll p[n+5],pos[n+5];
    iota(p+1,p+n+1,1);
    vector<ll>v;
    do{
        for(ll i=1;i<=n;i++){
            pos[p[i]]=i;
        }
        ll num=0,cnt=0;
        for(ll i=0;i<m;i++){
            auto [a,b]=edge[i];
            if(pos[a]>pos[b]){
                num|=(1ll<<i);
            }
        }
        v.pb(num);
    }while(next_permutation(p+1,p+n+1));
    sort(all(v));
    v.erase(unique(all(v)),v.end());
    ll ans=0;
    for(ll x:v){
        ans+=__builtin_popcountll(x);
    }
    cout<<ans;
}

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 23 / 23
• Subtask 4: 0 / 21
• Subtask 5: 0 / 37