이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "towns.h"
#include<bits/stdc++.h>
using namespace std;
#define sz(v) ((int)(v).size())
typedef long long lint;
typedef pair<int,int>pii;
int dis[111][111],par[111],wei[111];
int find(int p)
{
if(par[p]==p)return p;
else return par[p]=find(par[p]);
}
void uni(int p,int q)
{
p=find(p);q=find(q);
if(p==q)return ;
wei[q]+=wei[p];
par[p]=q;
}
int ch,n;
struct tri{
int a,b,c;
};
bool cmp(tri A, tri B){return A.a<B.a;}
vector<tri>X;
void f(int r)
{
vector<pii>C;
int cnt0=1,cnt1=1,check=0;
for(auto &k:X)
{
if(k.a==r)C.push_back({k.b,k.c});
else if(k.a<r)cnt0++;
else cnt1++;
}
for(auto &k:C)
{
par[k.second]=k.second;
wei[k.second]=1;
}
for(int i=0;i<sz(C);i++)
{
for(int j=i+1;j<sz(C);j++)
{
if(!dis[C[i].second][C[j].second])
{
dis[C[i].second][C[j].second]=dis[C[j].second][C[i].second]=getDistance(C[i].second,C[j].second);
}
if(dis[C[i].second][C[j].second]!=C[i].first+C[j].first)uni(C[i].second,C[j].second);
}
}
for(auto &k:C)
{
if(wei[k.second]>n/2)check=1;
}
if(cnt0>n/2 || cnt1>n/2)check=1;
if(!check)ch=1;
}
int hubDistance(int N, int sub) {
int maxi=-1,maxj=-1,maxx=-1;
int R=1e9;
n=N;
for(int i=1;i<N;i++)
{
dis[0][i]=dis[i][0]=getDistance(0,i);
if(dis[0][i]>maxx)
{
maxx=dis[0][i];
maxi=i;
}
}
maxx=-1;
for(int i=0;i<N;i++)
{
if(i!=maxi)
{
dis[maxi][i]=dis[i][maxi]=getDistance(maxi,i);
if(dis[maxi][i]>maxx)
{
maxx=dis[maxi][i];
maxj=i;
}
}
}
for(int i=0;i<N;i++)
{
if(i!=maxi && i!=maxj)
{
dis[maxj][i]=dis[i][maxj]=getDistance(maxj,i);
X.push_back({(dis[maxi][i]-dis[maxj][i]+maxx)/2,(dis[maxi][i]+dis[maxj][i]-maxx)/2,i});
}
}
sort(X.begin(),X.end(),cmp);
for(auto &k:X)
{
R=min(R,max(maxx-k.a,k.a));
}
ch=-1;
f(R);
f(maxx-R);
return ch*R;
}
컴파일 시 표준 에러 (stderr) 메시지
towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:60:28: warning: unused parameter 'sub' [-Wunused-parameter]
60 | int hubDistance(int N, int sub) {
| ~~~~^~~
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