Submission #1256489

#	Time	Username	Problem	Language	Result	Execution time	Memory
1256489		Zbyszek99	Brought Down the Grading Server? (CEOI23_balance)	C++20	100 / 100	1271 ms	184860 KiB

balance

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define ull unsigned long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
//mt19937 mt;void random_start(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll los(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

int n,s,t;
vector<vi> ans;
vector<pii> graph[2000001];
bool odw[2000001];
bool vert_odw[2000001];
int last[2000001];
int pop_iter = 1;
vi cycle;

void dfs(int v)
{
    vert_odw[v] = 1;
    while(!graph[v].empty())
    {
        pii t = graph[v].back();
        graph[v].pop_back();
        if(odw[t.ss]) continue;
        odw[t.ss] = 1;
        dfs(t.ff);
    }
    cycle.pb(v);
}

void solve(int l, int r, vector<vi> c)
{
    pop_iter++;
    if(l == r)
    {
        rep(i,n) ans[i][l] = c[i][0];
        return;
    }
    vi verts;
    int cur_edge = 0;
    int block = siz(c)*siz(c[0]);
    int color = block+n;
    rep(i,block+n) 
    {
        graph[i] = {};
        verts.pb(i);
    }
    forall(it,c)
    {
        forall(it2,it)
        {
            if(last[it2+color] != pop_iter)
            {
                verts.pb(it2+color);
                graph[it2+color] = {};
                last[it2+color] = pop_iter;
            }
        }
    }
    int cur = 0;
    int level = block;
    int pom  = 2000000;
    graph[pom] = {};
    verts.pb(pom);
    forall(it,c)
    {
        forall(it2,it)
        {
            graph[cur].pb({level,cur_edge});
            graph[level].pb({cur,cur_edge});
            cur_edge++;
            graph[it2+color].pb({cur,cur_edge});
            graph[cur].pb({it2+color,cur_edge});
            cur_edge++;
            cur++;
        }
        level++;
    }
    forall(it,c)
    {
        forall(i,it)
        {
            if(siz(graph[color+i]) % 2 == 1)
            {
                graph[pom].pb({color+i,cur_edge});
                graph[color+i].pb({pom,cur_edge});
                cur_edge++;
            }
        }
    }
    rep(i,cur_edge) odw[i] = 0;
    forall(it,verts) vert_odw[it] = 0;
    cycle = {};
    forall(it,verts)
    {
        if(vert_odw[it] == 0)
        {
            dfs(it);
            cycle.pop_back();
        }
    }
    vector<vi> c0(n);
    vector<vi> c1(n);
    cur = 0;
    forall(it,cycle)
    {
        if(it < block)
        {
            int x = it/(r-l+1);
            int y = it%(r-l+1);
            if(cur == 0) c0[x].pb(c[x][y]);
            else c1[x].pb(c[x][y]);
            cur ^= 1;
        }
    }
    solve(l,(l+r)/2,c0);
    solve((l+r)/2+1,r,c1);
}

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    //random_start();
    cin >> n >> s >> t;
    ans.resize(n);
    rep(i,n) ans[i].resize(s);
    vector<vi> c;
    c.resize(n);
    rep(i,n) c[i].resize(s);
    rep(i,n)
    {
        rep(j,s)
        {
            cin >> c[i][j];
        }
    }
    solve(0,s-1,c);
    rep(i,n)
    {
        rep(j,s)
        {
            cout << ans[i][j] << " ";
        }
        cout << "\n";
    }
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2-1: 15 / 15
• Subtask 2-2: 5 / 5
• Subtask 2-3: 5 / 5
• Subtask 3-1: 15 / 15
• Subtask 3-2: 5 / 5
• Subtask 3-3: 5 / 5
• Subtask 4-1: 20 / 20
• Subtask 4-2: 10 / 10
• Subtask 4-3: 10 / 10