Submission #251185

#	Time	Username	Problem	Language	Result	Execution time	Memory
251185		anakib1	Towns (IOI15_towns)	C++17	0 / 100	25 ms	1152 KiB

towns

#include <iostream>
#include <cmath>
#include <algorithm>
#include <stdio.h>
#include <cstring>
#include <string>
#include <cstdlib>
#include <vector>
#include <bitset>
#include <map>
#include <chrono>
#include <functional>
#include <unordered_set>
#include <unordered_map>
#include <numeric>
#include <queue>
#include <ctime>
#include <stack>
#include <set>
#include <list>
#include <deque>
#include <iomanip>
#include <sstream>
#include <fstream>
#include <stdarg.h>
#include <utility>

using namespace std;

#define pb push_back
#define mp make_pair
#define ll long long
#define ull unisgned long long
#define ld long double
#define all(a) a.begin(), a.end()
#define SORT(a) sort(all(a))
#define pii pair<int, int>
#define tii triple<int, int, int>
#define e 1e-7
#define PI acos(-1)
#define sz(a) (int)(a.size())
#define inf 1e17
#define vi vector<int>
#define F first
#define S second
#define rng(x) for(int _ = 0; _ < (x); _++)
#define rngi(i, x) for(int i = 0; i < (x); i++)
#define rngsi(s, i, x) for(int i = (s); i <(x); i++)
#define problem ""

template<typename A, typename B, typename C>
struct triple{
    A X;
    B Y;
    C Z;
    triple(A a = 0, B b = 0, C c = 0) :X(a), Y(b), Z(c) {}
};
template<typename A, typename B, typename C>
triple<A, B, C> make_triple(A a = 0, B b = 0, C c = 0){
    return triple<A, B, C>(a, b, c);
}
template<typename A, typename B, typename C>
bool operator<(const triple<A, B, C>& a, const triple<A, B, C>& b){
    if (a.X != b.X)
        return a.X < b.X;
    if (a.Y != b.Y)
        return a.Y < b.Y;
    return a.Z < b.Z;
}
template<typename T, typename SS>
ostream& operator<<(ostream& ofs, const pair<T, SS>& p){
    ofs << "( " << p.F << " , " << p.S << " )";
    return ofs;
}
template<typename T>
void print(T a){
    for (auto i : a)
        cout << i << ' ';
    cout << '\n';
}
template<typename T>
T max(T a, T b, T c){
    return max(a, max(b, c));
}
template<typename T>
T min(T a, T b, T c){
    return min(a, min(b, c));
}
template<typename T, typename D>
D min(T a){
    return *min_element(all(a));
}
template<typename T, typename D>
D max(T a){
    return *max_element(all(a));
}
struct custom_hash{
    static uint64_t splitmix64(uint64_t x){
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const{
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};/*
static int _N;
static int _dist[110][110];
static int _quota, _user_query;

void _ini_query(int N, int k) {
    int ret;
    _N = N;
    for (int i = 0; i < _N; i++)
        for (int j = 0; j < _N; j++)  {
        ret = scanf("%d", &_dist[i][j]);
            assert(ret == 1);
        }
    if (k == 1 || k == 3) _quota = _N * (_N - 1) / 2;
    else if (k == 2 || k == 4 || k == 6) _quota = (7 * _N + 1) / 2;
    else _quota = 5 * _N;
    _user_query = 0;
}


int getDistance(int i, int j) {
    _user_query++;
    if (_user_query > _quota) {
        printf("0\n");
        exit(0);
    }
    if (i < 0 || i >= _N) return 0;
    if (j < 0 || j >= _N) return 0;
    return _dist[i][j];
}*/
#include "towns.h"
int hubDistance(int n, int sub) {
    vector<vi> dd(n, vi(n, -1));
    auto get = [&](int x, int y){
        if(x == y)return 0;
        if(dd[x][y] >= 0) return dd[x][y];
        return dd[x][y]=dd[y][x]= getDistance(x, y);
    };
    
    vi d1(n);
    rngi(i, n - 1) d1[i + 1] = get(0, i + 1);
    int q = 1;
    int vv = max<vi, int>(d1);
    rngi(j, n - 1) if(d1[j] > d1[q]) q = j;
    vi d2(n);
    rngi(i, n) d2[i] = get(q, i);
    int ans = max<vi, int>(d2);
    int res = 1e9;
       vector<int> poss;
       rngi(i, n){
           int a = (d2[i] + vv - d1[i]) / 2;
           int b = vv - a;
           if(max({a, b, ans - a}) < res) {
               res = max({a, b, ans - a});
               poss.clear();
               poss.push_back(a);
           } else if(max({a, b, ans - a}) == res)
               poss.push_back(a);
           //~ cout << i << " " << res << endl;
       }
    return res;
}
/*
int main() {
    FILE *f;
    f = freopen("towns.in","r",stdin);
    assert(f != NULL);
    //f = freopen("towns.out","w",stdout);
    assert(f != NULL);
    int ncase, R, N;
    int subtask;
    int ret;
    ret = scanf("%d%d",&subtask,&ncase);
    assert(ret == 2);
    for (int i = 0; i < ncase; i++) {
        ret = scanf("%d",&N);
    assert(ret == 1);
        _ini_query(N,subtask);
        R=hubDistance(N,subtask);
        printf("%d\n",R);
    }
    return 0;
}

//

*/

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:142:28: warning: unused parameter 'sub' [-Wunused-parameter]
 int hubDistance(int n, int sub) {
                            ^~~

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