이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
int N,M;
int r[200001];
int l[200001];
bool check(int T){
int a=0;
for(int i=0;i<N;i++){
while(abs(l[a]-r[i])>T&&a<M)a++;
if(a==M)return false;
a++;
}
return true;
}
int main() {
cin>>N>>M;
for(int i=0;i<N;i++)cin>>r[i];
for(int i=0;i<M;i++)cin>>l[i];
if(N>M){
swap(N,M);
swap(r,l);
}
sort(r,r+N);
sort(l,l+M);
int x=-1;
for(int b=1e9+1;b>=1;b/=2)
while(!check(x+b))x+=b;
cout<<x+1;
return 0;
}
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