Submission #134867

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
134867	2019-07-23 10:49:34	nvmdava	Towns (IOI15_towns)	C++17	100 / 100	22 ms	504 KiB

towns

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#include "towns.h"
#include <bits/stdc++.h>
#define ff first
#define ss second
using namespace std;
int d[2][115], v;
map<int, int> cntr;
int hubDistance(int N, int sub) {
  memset(d, 0, sizeof d);
  cntr.clear();
  for(int i = 0; i < N; i++)
    if(d[0][v] < (d[0][i] = getDistance(0, i)))
      v = i;
  int T = d[0][v], D = 0;
  for(int i = 0; i < N; i++)
    D = max(D, d[1][i] = getDistance(v, i));
  int r = 1000000000;
  for(int i = 0; i < N; i++){
    int s = (T + d[1][i] - d[0][i]) >> 1;
    cntr[s]++;
    r = min(r, max(s, D - s));
  }
  int chk = -1, l = 0;
  for(auto& x : cntr){
    if(l <= N / 2 && N - (l += x.ss) <= N / 2){
 
 
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Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:46:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 1; i < s.size(); i += 2){
                  ~~^~~~~~~~~~
towns.cpp:66:21: warning: conversion to 'int' from 'std::vector<int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
  else sz = s[0].size();
            ~~~~~~~~~^~
towns.cpp:70:17: warning: conversion to 'int' from 'std::vector<int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
    sz += x.size();
                 ^
towns.cpp:9:28: warning: unused parameter 'sub' [-Wunused-parameter]
 int hubDistance(int N, int sub) {
                            ^~~

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