Submission #387447

#	Time	Username	Problem	Language	Result	Execution time	Memory
387447		mehrdad_sohrabi	Towns (IOI15_towns)	C++14	35 / 100	22 ms	736 KiB

towns

/// Black lives matter
#include <bits/stdc++.h>
#include "towns.h"
/// 500 485 462 A4
using namespace std;
typedef long long int ll;
typedef complex<double> point;
typedef long double ld;
#define pb push_back
#define pii pair < ll , ll >
#define F first
#define S second
//#define endl '\n'
#define int long long
#define sync ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
#define kill(x) return cout<<x<<'\n', 0;
const int N=200;
/*
ll disin[N][N];
int getDistance(ll u,ll v){
    return disin[u][v];
}
*/
ll dis[N][N];
ll t[3];
int32_t hubDistance(int32_t n, int32_t sub) {
    memset(t,0,sizeof t);
	ll mx0=0,id0=0,mx1=0,id1=0;
	memset(dis,-1,sizeof dis);
	for (int i=1;i<n;i++){
        if (dis[0][i]==-1) dis[0][i]=getDistance(0,i),dis[i][0]=dis[0][i];
        if (dis[0][i]>mx0){
            mx0=dis[0][i];
            id0=i;
        }
	}
	for (int i=0;i<n;i++){
        if (dis[id0][i]==-1) dis[id0][i]=getDistance(id0,i),dis[i][id0]=dis[id0][i];
        if (dis[id0][i]>mx1){
            mx1=dis[id0][i];
            id1=i;
        }
	}
	ll ans=dis[id0][id1],mn=1e9,rast=0;
	t[0]++;
	t[2]++;
	for (int i=0;i<n;i++){
        if (i==id0 || i==id1) continue;
        dis[id1][i]=getDistance(id1,i);
        dis[i][id1]=dis[id1][i];
        ll dd=dis[id0][i]-dis[id1][i];
        ll z=abs(dis[id0][i]-dis[id1][i]);
        mn=min(mn,z);
        if (mn==z) rast=dd;
	}
	for (int i=0;i<n;i++){
        if (i==id0 || i==id1) continue;
        ll dd=dis[id0][i]-dis[id1][i];
        if (dd==rast) t[1]++;
        if (dd<rast) t[0]++;
        if (dd>rast) t[2]++;
	}
	ll zz=1;
	if (t[0]>n/2 || t[1]>n/2 || t[2]>n/2) zz=-1;

	return zz*(ans+mn)/2;
}
/*
int32_t main(){
    ll x,y;
    cin >> x >> y;
    ll n;
    cin >> n;
    for (int i=0;i<n;i++){
        for (int j=0;j<n;j++) cin >> disin[i][j];
    }
    cout << hubDistance(n,y);
}
*/
/*
1 1
10
0 16 16 16 20 16 20 16 8 16
16 0 16 16 20 8 20 16 16 16
16 16 0 8 20 16 20 16 16 16
16 16 8 0 20 16 20 16 16 16
20 20 20 20 0 20 22 20 20 20
16 8 16 16 20 0 20 16 16 16
20 20 20 20 22 20 0 20 20 20
16 16 16 16 20 16 20 0 16 8
8 16 16 16 20 16 20 16 0 16
16 16 16 16 20 16 20 8 16 0
*/

Compilation message (stderr)

towns.cpp: In function 'int32_t hubDistance(int32_t, int32_t)':
towns.cpp:32:52: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   32 |         if (dis[0][i]==-1) dis[0][i]=getDistance(0,i),dis[i][0]=dis[0][i];
      |                                                    ^
towns.cpp:39:54: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   39 |         if (dis[id0][i]==-1) dis[id0][i]=getDistance(id0,i),dis[i][id0]=dis[id0][i];
      |                                                      ^~~
towns.cpp:39:58: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   39 |         if (dis[id0][i]==-1) dis[id0][i]=getDistance(id0,i),dis[i][id0]=dis[id0][i];
      |                                                          ^
towns.cpp:50:33: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   50 |         dis[id1][i]=getDistance(id1,i);
      |                                 ^~~
towns.cpp:50:37: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   50 |         dis[id1][i]=getDistance(id1,i);
      |                                     ^
towns.cpp:67:20: warning: conversion from 'll' {aka 'long long int'} to 'int32_t' {aka 'int'} may change value [-Wconversion]
   67 |  return zz*(ans+mn)/2;
      |         ~~~~~~~~~~~^~
towns.cpp:27:40: warning: unused parameter 'sub' [-Wunused-parameter]
   27 | int32_t hubDistance(int32_t n, int32_t sub) {
      |                                ~~~~~~~~^~~

• Subtask 1: 13 / 13
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 39