제출 #1285229

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1285229		goulthen	Permutation Game (APIO25_permgame)	C++20	6 / 100	2 ms	352 KiB

permgame

#include "permgame.h"
#include <bits/stdc++.h>
using namespace std;

#define rep(i,a,b) for(int i = a; i <= b; ++i)
#define pb push_back
#define fi first
#define se second
#define pii pair<int,int>

int Alice(int m, int e, std::vector<int> u, std::vector<int> v, int n, std::vector<int> p) {
    int cnt = 0;
    rep(i,0,n-1) if (p[i]==i) cnt++;
    vector<int> deg(m);
    rep(i,0,e-1) deg[u[i]]++, deg[v[i]]++;

    rep(i,0,m-1) if(deg[i] > 2) return cnt;

    while(1){
        pii cur = {-1,-1};
        vector<bool> mk(n+1,0);

        rep(i,0,n-1) {
            if(mk[i]) continue;
            mk[i] = 1;
            int st = p[i],sz = 1;
            while (!mk[st]){
                sz++;
                st = p[st];
            }
            cur = max(cur,{sz,i});
        }
        if(cur.fi < m) break;
        cnt++;

        vector<int> t;
        t.pb(cur.se);
        rep(i,1,m-1) {
            t.pb(p[t.back()]);
        }
        int j = Bob(t);
        swap(p[t[u[j]]], p[t[v[j]]]);
    }

    return cnt;

}

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