Submission #347765

#	Time	Username	Problem	Language	Result	Execution time	Memory
347765		Harry464	Pictionary (COCI18_pictionary)	C++14	140 / 140	792 ms	7764 KiB

pictionary

#include <iostream>
#include <vector>
#include <set>
#include <cmath>
#include <algorithm>
#include <queue>
#include <map>

using namespace std;

typedef long long ll;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    ll n, m, q;
    cin >> n >> m >> q;
    vector <pair <ll, ll>> kv(q);
    for (int i = 0; i < q; i++)
        cin >> kv[i].first >> kv[i].second;
    vector <ll> lo(q, 1);
    vector <ll> hi(q, m + 1);
    vector <ll> rjesenja(q, -1);
    ll rjeseni = 0;
    while (rjeseni < q){
        vector <pair <ll,ll>> mids(q);
        for (int i = 0; i < q; i++)
            mids[i].first = (lo[i]+hi[i])/2, mids[i].second = i;
        sort(mids.begin(), mids.end());
        vector <ll> par(n+1);
        vector <ll> ranks(n+1);
        for (int i = 0; i < n; i++)
            par[i+1] = i + 1, ranks[i+1] = 0;
        ll slid = 0;
        for (int i = 0; i < m; i++){
            ll tren = 2*(m - i);
            while (tren <= n){
                ll part = tren;
                while (part != par[part])
                    part = par[part];
                ll pars = m - i;
                while (pars != par[pars])
                    pars = par[pars];
                if (pars == part){
                    tren += m - i;
                    continue;
                }
                if (ranks[pars] < ranks[part])
                    swap(pars,part);
                par[part] = pars;
                if (ranks[pars] == ranks[part]) ranks[pars]++;
                tren += m - i;
            }
            while (slid <= q && mids[slid].first == i + 1){
                ll upit = mids[slid].second;
                if (rjesenja[upit] != -1){
                    slid++;
                    continue;
                }
                ll para = kv[upit].first, parb = kv[upit].second;
                while (para != par[para])
                    para = par[para];
                while (parb != par[parb])
                    parb = par[parb];
                if (para == parb){
                    hi[upit] = i + 1;
                } else {
                   lo[upit] = i + 2;
                }
                if (lo[upit] >= hi[upit])
                    rjeseni++, rjesenja[upit] = lo[upit];
                slid++;
            }
        }
    }
    for (int i = 0; i < q; i++)
        cout << rjesenja[i] << endl;
}

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