Submission #1248520

#	Time	Username	Problem	Language	Result	Execution time	Memory
1248520		lrnnz	Towns (IOI15_towns)	C++20	25 / 100	10 ms	484 KiB

towns

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

#define all(a) (a).begin(), (a).end()
#define ll long long
#define ld long double
#define ui uint64_t
#define cont(set, element) ((set).find(element) != (set).end())
#define pb push_back

#define chmin(x, y) (x = min(x, y)) 
#define chmax(x, y) (x = max(x, y))

/********* 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";
}

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

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

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

map<pair<ll,ll>, ll> memo;
int query(int a, int b){
    if (b > a)
        swap(a,b);

    if (memo.count({a, b}))
        return memo[{a,b}];

    return memo[{a,b}] = getDistance(a,b);
} 

int hubDistance(int N, int sub) {
    memo.clear();
    int f = 0, hi = 0;
    for (int i = 1; i < N; i++){
        ll x = query(0, i);
        if (x > hi){
            hi = x;
            f = i;
        }
    }


    int s = 0;
    hi = 0;
    for (int i = 0; i < N; i++){
        if (i == f)
            continue;
        ll x = query(f, i);
        if (x > hi){
            hi = x;
            s = i;
        }
    }

    auto work = [&](ll a, ll b, ll c) -> ll {
        ll ab = query(a,b);
        ll bc = query(b,c);
        ll ca = query(c,a);

        ll abc = (ab+bc+ca)/2;
        a = abc-bc, b = abc-ca, c = abc-ab;
        return max({a,b,c});
    };

    ll ans = inf;
    for (int i = 0; i < N; i++){
        chmin(ans, work(f,s,i));
    }

    return -ans;
}

• Subtask 1: 13 / 13
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 39