Submission #400254

#	Time	Username	Problem	Language	Result	Execution time	Memory
400254		ly20	Towns (IOI15_towns)	C++17	0 / 100	23 ms	396 KiB

towns

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


const int MAXN = 120;
int dist[MAXN][MAXN];
int gd(int a, int b) {
    if(dist[a][b] == 0) {
        dist[a][b] = getDistance(a, b);
        dist[b][a] = dist[a][b];
    }
    return dist[a][b];
}
int hubDistance(int n, int sub) {
	//int resp = 0;
	int mx1 = 1, mx = 0;
	int a, b;
	for(int i = 2; i <= n; i++) {
        int d = gd(1, i);
        if(d > mx) {
            mx = d; mx1 = i;
        }
	}
    a = mx1; mx = 0;
    for(int i = 1; i <= n; i++) {
        if(i == a) continue;
        int d = gd(a, i);
        if(d > mx) {
            mx = d; mx1 = i;
        }
    }
    b = mx1;
    int dim = mx;
    //set <int> di;
    int resp = dim;
    for(int i = 1; i <= n; i++) {
        if(i == a || i == b) continue;
        int d = gd(a, i) - (gd(a, i) + gd(b, i) - dim) / 2;
        resp = min(resp, max(d, dim - d));
    }
	return resp;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:15:28: warning: unused parameter 'sub' [-Wunused-parameter]
   15 | 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