Submission #1122164

#	Time	Username	Problem	Language	Result	Execution time	Memory
1122164		SalihSahin	Towns (IOI15_towns)	C++14	25 / 100	12 ms	508 KiB

towns

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

int hubDistance(int N, int sub) {
    int d1 = 0, dis = 0;
    for(int i = 1; i < N; i++){
        int x = getDistance(0, i);
        if(x > dis){
            d1 = i;
            dis = x;
        }
    }

    vector<int> distod1(N);
    int d2 = 0;
    dis = 0;
    for(int i = 0; i < N; i++){
        int x = getDistance(d1, i);
        distod1[i] = x;
        if(x > dis){
            d2 = i;
            dis = x;
        }
    }
    int diameter = dis;
    map<pair<int, int>, int> cnt;
    int R = 1e9;
    for(int i = 0; i < N; i++){
        if(i == d1 || i == d2) continue;
        int other = i;

        int c1 = distod1[other], c2 = getDistance(d2, other);
        int othertoroot = ((c1 + c2) - diameter)/2;

        pair<int, int> val = {c1 - othertoroot, c2 - othertoroot};
        cnt[val]++;

        int Rcan = max(c1 - othertoroot, c2 - othertoroot);
        R = min(R, Rcan);
    }

    bool balanced = 1;
    for(auto itr: cnt){
        if(itr.second > N/2) balanced = 0;
    }

    if(balanced) return R; 
    else return -R;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:6:28: warning: unused parameter 'sub' [-Wunused-parameter]
    6 | 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