Submission #815386

#	Time	Username	Problem	Language	Result	Execution time	Memory
815386		kwongweng	Towns (IOI15_towns)	C++17	25 / 100	13 ms	1136 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef long double ld;
typedef pair<ll, ll> pll;
#define FOR(i, a, b) for(int i = a; i < b; i++)
#define ROF(i, a, b) for(int i = a; i >= b; i--)
#define ms memset
#define pb push_back
#define fi first
#define se second
#define dist(i,j) getDistance(i,j)

int hubDistance(int N, int sub) {
	int d[N][N]; ms(d,0,sizeof(d));
	int mx = 0, u=0;
	FOR(i,1,N){
		d[0][i] = d[i][0] = dist(0,i);
		if (d[0][i] > mx){
			mx=d[0][i]; u=i;
		}
	}
	mx=0; int v = 0;
	FOR(i,0,N){
		if (i==u) continue;
		if (i>0) d[u][i]=d[i][u]=dist(i,u);
		if (d[u][i]>mx){
			v=i; mx=d[u][i];
		}
	}
	FOR(i,0,N){
		if (i==u || i==v) continue;
		d[i][v]=d[v][i]=dist(i,v);
	}
	int R=2e9;
	FOR(i,0,N){
		R=min(R,abs(d[u][i]-d[v][i])+d[u][v]);
	}
	R/=2;
	return R;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:19:28: warning: unused parameter 'sub' [-Wunused-parameter]
   19 | 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