제출 #1295508

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1295508		lrnnz	Nile (IOI24_nile)	C++20	38 / 100	67 ms	13036 KiB

nile

#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <queue>
#include <random>
#include "nile.h"
using namespace std;

#define all(a) (a).begin(), (a).end()
#define ll long long
#define ld long double
#define ui __int128_t
#define cont(set, element) ((set).find(element) != (set).end())
#define pb push_back

template<class T, class U> inline bool chmin(T& a, const U& b) { if (a > b) { a = b; return true; } return false; }
template<class T, class U> inline bool chmax(T& a, const U& b) { if (a < b) { a = b; return true; } return false; }
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

/********* DEBUG *********/

template <typename T>
void outvec(const vector<T>& Z){
    for (const T& x : Z)
    cout << x << ' ';
    cout << "\n";
}
void printVariable(const any& var) {
    if (!var.has_value()) {
        cout << "null";
        return;
    }

    if (var.type() == typeid(int)) {
        cout << any_cast<int>(var);
    } else if (var.type() == typeid(double)) {
        cout << any_cast<double>(var);
    } else if (var.type() == typeid(float)) {
        cout << any_cast<float>(var);
    } else if (var.type() == typeid(char)) {
        cout << any_cast<char>(var);
    } else if (var.type() == typeid(bool)) {
        cout << (any_cast<bool>(var) ? "true" : "false");
    } else if (var.type() == typeid(string)) {
        cout << any_cast<string>(var);
    } else if (var.type() == typeid(const char*)) {
        cout << any_cast<const char*>(var);
    } else if (var.type() == typeid(long long)) {
        cout << any_cast<long long>(var);
    } else {
        cout << "[unknown type]";
    }
}


template<typename... Args>
void outval(Args... args) {
    vector<any> variables = {args...};

    for (size_t i = 0; i < variables.size(); ++i) {
        printVariable(variables[i]);
        if (i != variables.size() - 1) {
            cout << " ";
        }
    }
    cout << "\n";
}

/********* DEBUG *********/

#define sp << " " <<
#define fi first
#define se second

const ll MOD2 = 1e9 + 7;
const ll MOD = 998244353;
const ll inf = 1e18;

ll madd(ll a, ll b) { a += b; if (a >= MOD) a -= MOD; return a; }
ll msub(ll a, ll b) { a -= b; if (a < 0) a += MOD; return a ; }
ll mmul(ll a, ll b) { return 1ll * a * b % MOD; }
ll mpow(ll a, ll b) { ll ans = 1; for (; b; b >>= 1, a = mmul(a, a)) if (b & 1) ans = mmul(ans, a); return ans; }

vector<ll> calculate_costs(vector<int> W, vector<int> A, vector<int> B, vector<int> E) {
    ll Q = E.size(), n = W.size();
    vector<ll> ans(Q), ord(n);

    iota(all(ord), 0);
    sort(all(ord), [&](ll i, ll j) {
        return W[i] < W[j];
    });

    // diff, i
    vector<pair<ll,ll>> teams;
    for (int i = 0; i+1 < n; i++) {
        ll a = W[ord[i]];
        ll b = W[ord[i+1]];

        teams.pb({b-a, i});
        if (i+2 < n) {
            ll c = W[ord[i+2]];
            teams.pb({c-a, ~i});
        }
    }

    sort(all(teams));

    vector<ll> ordQ(Q);
    iota(all(ordQ), 0);
    sort(all(ordQ), [&](ll i, ll j) {
        return E[i] < E[j];
    });

    vector<ll> par(n), sz(n, 1);
    iota(all(par), 0);

    // lowest extra per parity
    vector<vector<ll>> lo(2, vector<ll>(n, inf));
    for (int i = 0; i < n; i++) {
        lo[i%2][i] = A[ord[i]] - B[ord[i]];
    }

    auto find = [&](auto &&find, ll u) -> ll {
        if (par[u] != u)
            par[u] = find(find, par[u]);
        return par[u];
    };

    ll sumB = 0, xtra = 0;
    auto unite = [&](ll a, ll b) -> void {
        a = find(find, a);
        b = find(find, b);

        assert(a != b);
        if (a == b) return;
        if (a > b) swap(a, b);

        par[b] = a;

        // implement exclusion if b or a in extra rn
        if (sz[a] % 2) 
            xtra -= lo[a%2][a];
        
        if (sz[b] % 2) 
            xtra -= lo[b%2][b];

        sz[a] += sz[b];
        ll d = (b-a)%2;
        for (int i = 0; i < 2; i++) {
            chmin(lo[i][a], lo[i^d][b]);
        }

        if (sz[a] % 2) {
            // add to xtra
            xtra += lo[a%2][a];
        }
    };

    for (int i = 0; i < n; i++) {
        xtra += A[i] - B[i];
        sumB += B[i];
    }

    ll p = 0, m = teams.size();
    for (int i = 0; i < Q; i++) {
        ll cq = E[ordQ[i]];
        
        while (p < m && teams[p].fi <= cq) {
            // implement sweeping
            auto [v, j] = teams[p++];
            if (j >= 0) {
                unite(j, j+1);
            } else {
                j = ~j;
                ll par = find(find, j);
                ll cand = A[ord[j+1]] - B[ord[j+1]]; 

                if (sz[par]%2)
                    xtra -= lo[par%2][par];
                
                chmin(lo[0][par], cand);
                chmin(lo[1][par], cand);

                if (sz[par]%2)
                    xtra += lo[par%2][par];
            }
        }

        ans[ordQ[i]] = sumB + xtra;
    }

    return ans;
}  

• Subtask 0: 0 / 0
• Subtask 1: 6 / 6
• Subtask 2: 0 / 13
• Subtask 3: 17 / 17
• Subtask 4: 0 / 11
• Subtask 5: 0 / 20
• Subtask 6: 15 / 15
• Subtask 7: 0 / 18