Submission #1266429

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266429		abdelhakim	Permutation Game (APIO25_permgame)	C++20	30 / 100	1 ms	328 KiB

permgame

#include "permgame.h"
#include <vector>
#include <utility>
#include <bits/stdc++.h>
#define dbg(x) cerr << #x << ' ' << x << endl;
#define ll long long
#define inf (ll) 1e17
using namespace std;

//         vector<int> t={ind[i],i};
//         int j = Bob(t);
//         std::swap(p[t[u[j]]], p[t[v[j]]]);

vector<bool> vis;
void dfs(ll node, vector<int>& g, vector<int>& p, ll first)
{
    if(vis[node]) return;
    vis[node]=true;
    g.push_back(node);
    dfs(p[node],g,p,first);
}
int Alice(int m, int e, std::vector<int> u, std::vector<int> v, int n, std::vector<int> p) {
    vector<vector<ll>> adj(m);
    vis.assign(n,0);
    ll curans=0;
    for (int i=0;i<n;i++)
    {
        curans+=p[i]==i;
    }
    for (int i=0;i<e;i++)
    {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
    }
    for (int i=0;i<m;i++)
    {
        if(adj[i].size() > 2)
        {
            return curans;
        }
    }
  while(m == 3) {
    bool taken[n];
    memset(taken,0,sizeof(taken));
    bool gg = 1;
    for(int i=0;i<n;i++)
      if(!taken[i]) {
        int c = 1;
        for(int j=i;p[j]!=i;j=p[j])
          c++, taken[p[j]] = 1;
        if(c > 2 && (c & 1)) {
          vector<int> qry = {i, p[i], p[p[i]]};
          int t = Bob(qry);
          swap(p[qry[u[t]]],p[qry[v[t]]]);
          gg = 0;
          break;
        }
      }
    if(gg) {
      int ans = 0;
      for(int i=0;i<n;i++)
        ans += (i == p[i]);
      return ans;
    }
  }
    ll cnt=0;
    for (int i=0;i<n;i++)
    {
        cnt+=p[i]==i;
    }
    return cnt;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 6
• Subtask 2: 6 / 6
• Subtask 3: 0 / 10
• Subtask 4: 24 / 24
• Subtask 5: 0 / 24
• Subtask 6: 0 / 30