Submission #718969

#	Time	Username	Problem	Language	Result	Execution time	Memory
718969		Karuk	Towns (IOI15_towns)	C++14	0 / 100	12 ms	348 KiB

towns

#include "towns.h"
#include<bits/stdc++.h>
using namespace std;
map<pair<int,int>,long long>m;
long long getD(int x,int y) {
    return getDistance(x,y);
    if(x==y)return 0;
    if(m[{x,y}]!=0)return m[{x,y}];
    m[{x,y}]=m[{y,x}]=getDistance(x,y);
    return m[{x,y}];
}
long long getmindist(int f,int s,int t) {
    long long d1=getD(f,s);
    long long d2=getD(s,t);
    long long d3=getD(f,t);
    long long dd=(d1+d2-d3)/2;
    long long d=(d1+d3-d2)/2;
    long long ddd=(d2+d3-d1)/2;
    return max(max(d,dd),ddd);
}
int hubDistance(int n,int sub) {
    int maxd=0,maxind=0;
    int md=0;
    for(int i=1;i<n;i++) {
        long long p=getD(0,i);
        if(maxd<p) {
            maxd=p;
            maxind=i;
        }
    }
    md=maxind;
    maxd=0;
    maxind=0;
    for(int i=0;i<n;i++) {
        if(i==md)continue;
        long long p=getD(md,i);
        if(maxd<p) {
            maxd=p;
            maxind=i;
        }
    }
    long long minr=1e12;
    for(int i=0;i<n;i++) {
        minr=min(minr,getmindist(i,md,maxind));
    }
    return minr;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:27:18: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   27 |             maxd=p;
      |                  ^
towns.cpp:38:18: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   38 |             maxd=p;
      |                  ^
towns.cpp:46:12: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   46 |     return minr;
      |            ^~~~
towns.cpp:21:27: warning: unused parameter 'sub' [-Wunused-parameter]
   21 | 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