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;
long long n,k,cnt,A[500005];
map <long long,long long> mp,mp1;
vector <long long> v,st,v1;
long long check(long long sum) {
for(long long i=1;i<=n;i++) mp1[A[i]]++;
cnt=0; v.clear(); v1.clear();
for(long long i=1;i<=n;i++) {
if(mp1[A[i]]==0) continue;
mp1[A[i]]--;
if(mp1[sum-A[i]]>=1) {
cnt++; mp1[sum-A[i]]=0;
v.push_back(A[i]);
v1.push_back(sum-A[i]);
if(cnt==(n-k)/2) break;
}
}
mp1.clear();
if(cnt>=(n-k)/2) return 1;
else return 0;
}
int main() {
ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
cin>>n>>k;
n+=k;
for(long long i=1;i<=n;i++) {
cin>>A[i];
}
sort(A+1,A+1+n);
if(n>=4*k) {
for(long long i=1;i<=2*k;i++) {
for(long long j=n-2*k+1;j<=n;j++) {
mp[A[i]+A[j]]++;
if(mp[A[i]+A[j]]>=k) st.push_back(A[i]+A[j]);
}
}
for(long long i=0;i<st.size();i++) {
if(check(st[i])) break;
}
for(long long i=0;i<v.size();i++)
cout<<v[i]<<" ";
for(long long i=v1.size()-1;i>=0;i--)
cout<<v1[i]<<" ";
}
else {
for(long long i=1;i<=k;i++) {
for(long long j=n-k+i-1;j<=n;j++) {
st.push_back(A[i]+A[j]);
}
}
for(long long i=0;i<st.size();i++) {
if(check(st[i])) break;
}
for(long long i=0;i<v.size();i++)
cout<<v[i]<<" ";
for(long long i=v1.size()-1;i>=0;i--)
cout<<v1[i]<<" ";
}
}
컴파일 시 표준 에러 (stderr) 메시지
tabletennis.cpp: In function 'int main()':
tabletennis.cpp:38:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
38 | for(long long i=0;i<st.size();i++) {
| ~^~~~~~~~~~
tabletennis.cpp:41:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | for(long long i=0;i<v.size();i++)
| ~^~~~~~~~~
tabletennis.cpp:52:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | for(long long i=0;i<st.size();i++) {
| ~^~~~~~~~~~
tabletennis.cpp:55:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
55 | for(long long i=0;i<v.size();i++)
| ~^~~~~~~~~
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