Submission #424607

#	Time	Username	Problem	Language	Result	Execution time	Memory
424607		MarcoMeijer	Towns (IOI15_towns)	C++14	25 / 100	25 ms	1100 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>
using namespace std;

// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e9
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
#define sz size()
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

const int MX = 120;

static int mem[MX][MX];

int n;

int getD(int u, int v) {
    if(mem[u][v] != -1)
        return mem[u][v];
    return mem[u][v] = mem[v][u] = getDistance(u,v);
}

int hubDistance(int N, int sub) {
    n = N;
    RE(i,n) RE(j,n) mem[i][j] = -1;
    RE(i,n) mem[i][i] = 0;

    int u = 0, v=0;
    RE(i,n)
        if(getD(u,i) > getD(u,v))
            v = i;
    RE(i,n)
        if(getD(v,i) > getD(u,v))
            u = i;
    
    int res = getD(u,v);
    RE(i,n) {
        if(i == u || i == v) continue;
        int nres = getD(u,i) + getD(v,i) - getD(u,v);
        nres /= 2;
        nres = getD(u,i) - nres;
        nres = max(nres, getD(u,v)-nres);
        res = min(res, nres);
    }

    return res;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:44:28: warning: unused parameter 'sub' [-Wunused-parameter]
   44 | int hubDistance(int N, int sub) {
      |                        ~~~~^~~

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