Submission #1027373

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027373		Dan4Life	Towns (IOI15_towns)	C++17	0 / 100	10 ms	1116 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>
using namespace std;
using ar2 = array<int,2>;

int n;
int mem[120][120];
map<int,int> M;

int dis(int a, int b){
	if(a==b) return 0;
	if(mem[a][b]) return mem[a][b];
	if(mem[b][a]) return mem[b][a];
	return mem[a][b]=mem[b][a]=getDistance(a,b);
}

int hubDistance(int N, int sub) {
	n = N; ar2 mx = {0,0};
	int a = 0, b = 0; M.clear();
	
	for(int i = 0; i < n; i++) 
		mx=max(mx,{dis(a,i),i});
	a = mx[1]; mx = {0,0};
	for(int i = 0; i < n; i++)
		mx=max(mx,{dis(a,i),i});
	b = mx[1];
	
	int R = dis(a,b); 
	for(int i = 0; i < n; i++){
		if(i==a or i==b)continue;
		int branch = dis(a,i)+dis(b,i)-dis(a,b);
		int pos = dis(a,i)-branch;
		M[pos]=max(M[pos],branch+max(dis(a,i),dis(b,i)));
	}
	for(auto u : M) R=min(R,u.second);
	return R;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:17:28: warning: unused parameter 'sub' [-Wunused-parameter]
   17 | 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