이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<float.h>
#include<limits.h>
#include <cassert>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric> //gcd(a,b)
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
using namespace std;
#define int long long
#define double long double
const int mod=998244353,mxn=2e5+5,lg=30,inf=1e18,minf=-1e18,Mxn=100000;
int n,k,sz;
struct info{int l,r,posl,posr,mx,id;};
bool cmp(info a,info b){return a.r<b.r;}
bool cmp2(info a,info b){return a.id<b.id;}
struct seg{
int v[2*mxn+10];
void init(){for(int i=0;i<=2*sz+5;i++)v[i]=0;}
void update(int pos,int val){
pos+=sz;
v[pos]=max(val,v[pos]);
for(int i=pos;i>0;i>>=1)v[i>>1]=max(v[i],v[i^1]);
}
int qry(int l,int r){
int ans=0;
for(l+=sz,r+=sz;l<=r;l>>=1,r>>=1){
if(l&1)ans=max(ans,v[l++]);
if(!(r&1))ans=max(ans,v[r--]);
}
return ans;
}
}t;
struct lazyseg{
int v[4*mxn+10],add[4*mxn+10];
void push(int pos,int l,int r){
if(!add[pos])return;
v[pos]=1;
if(l!=r)add[pos*2]=add[pos],add[pos*2+1]=add[pos];
add[pos]=0;
}
void update(int l,int r,int pos,int ql,int qr){
push(pos,l,r);
if(l>qr||r<ql)return;
if(ql<=l&&r<=qr){
add[pos]=1;
push(pos,l,r);
return;
}
int mid=l+(r-l)/2;
update(l,mid,pos*2,ql,qr);
update(mid+1,r,pos*2+1,ql,qr);
v[pos]=v[pos*2]|v[pos*2+1];
}
int qry(int l,int r,int pos,int ql,int qr){
if(ql>qr)return 0;
push(pos,l,r);
if(l>qr||r<ql)return 0;
if(ql<=l&&r<=qr)return v[pos];
int mid=l+(r-l)/2;
return (qry(l,mid,pos*2,ql,qr)|qry(mid+1,r,pos*2+1,ql,qr));
}
}t2;
vector<info>v;
vector<int>compress;
int32_t main(){
fastio
cin>>n>>k;
for(int i=0;i<n;i++){
int a,b;cin>>a>>b;
v.pb({a,b,-1,-1,0,i+1});
compress.pb(a);
compress.pb(b);
}
sort(all(compress));
unique(all(compress));
sz=compress.size()+5;
for(auto &i:v){
i.posl=lb(all(compress),i.l)-compress.begin()+1;
i.posr=lb(all(compress),i.r)-compress.begin()+1;
}
sort(all(v),cmp);
reverse(all(v));
t.init();
for(auto &i:v){
i.mx=t.qry(i.posr,sz)+1;
t.update(i.posl,i.mx);
}
reverse(all(v));
t.init();
for(auto &i:v){
i.mx=max(i.mx,t.qry(0,i.posl));
t.update(i.posr,i.mx);
}
sort(all(v),cmp2);
vector<int>ans;
for(auto i:v){
if(i.mx<k)continue;
if(t2.qry(0,sz,1,i.posl+1,i.posr-1))continue;
t2.update(0,sz,1,i.posl,i.posr);
ans.pb(i.id);
if(ans.size()==k)break;
}
if(ans.size()<k)cout<<-1<<'\n';
else for(int i=0;i<k;i++)cout<<ans[i]<<"\n";
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
event2.cpp: In function 'int32_t main()':
event2.cpp:127:16: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
127 | if(ans.size()==k)break;
| ~~~~~~~~~~^~~
event2.cpp:129:15: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
129 | if(ans.size()<k)cout<<-1<<'\n';
| ~~~~~~~~~~^~
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