Submission #484879

#	Time	Username	Problem	Language	Result	Execution time	Memory
484879		ETK	The Collection Game (BOI21_swaps)	C++14	100 / 100	8 ms	436 KiB

swaps

#include <bits/stdc++.h>
#include "swaps.h"
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define fi first
#define se second
#define pii pair<int,int>
using namespace std;
vector <int> r;
vector <pii> Q;
void Schedule(int i,int j){
    schedule(r[i],r[j]);
    Q.push_back({i,j});
}
void Visit(){//交换逆序元素，最多调用50次
    if(!Q.size())return;
    vector <int> res=visit();
    rep(i,0,(int)res.size()-1)if(!res[i])swap(r[Q[i].fi],r[Q[i].se]);
    Q.clear();
}
void solve(int n,int q){
    rep(i,1,n)r.push_back(i);
    for(int k=2;k<=2*n;k<<=1){
        rep(i,0,n-1){
            int x=i^(k-1);
            if(i<x&&x<n)Schedule(i,x);
        }
        Visit();
        for(int j=k>>2;j;j>>=1){
            rep(i,0,n-1){
                int x=i^j;
                if(i<x&&x<n)Schedule(i,x);
            }
            Visit();
        }
    }
    answer(r);
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 3 / 3
• Subtask 4: 2 / 2
• Subtask 5: 9 / 9
• Subtask 6: 6 / 6
• Subtask 7: 9 / 9
• Subtask 8: 6 / 6
• Subtask 9: 21 / 21
• Subtask 10: 14 / 14
• Subtask 11: 9 / 9
• Subtask 12: 6 / 6