This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<iostream>
#include<vector>
#include<queue>
#include<algorithm>
#define ep emplace
#define eb emplace_back
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
#define semicolon ;
#define ryan bear
using namespace std;
typedef long long ll;
typedef pair<int,int>pi;
typedef pair<ll,ll>pl;
const int inf=1e9+7;
const ll INF=1e18;
const int sz=2020;
int n;
int x[400710];
priority_queue<int,vector<int>,greater<int> >pq[sz];
priority_queue<int,vector<int>,greater<int> >rn[sz];
inline void init()
{
for(int i=0;i<n;i++)
pq[i/sz].ep(x[i]);
return;
}
inline void app(int g)
{
if(rn[g].empty())
return;
for(int i=g*sz;i<g*sz+sz;i++)
if(rn[g].top()<x[i])
rn[g].ep(x[i]),rn[g].pop();
return;
}
inline void init(int g)
{
while(!pq[g].empty())
pq[g].pop();
for(int i=g*sz;i<g*sz+sz;i++)
pq[g].ep(x[i]);
return;
}
inline int solve(int s,int t,int p)
{
if(t-s<sz)
{
for(int i=s;i<t;i++)
if(p<x[i])
swap(p,x[i]);
return p;
}
int l=(s+sz-1)/sz;
int r=t/sz;
if(s<l*sz)
{
app(l-1);
for(int i=s;i<l*sz;i++)
if(p<x[i])
swap(p,x[i]);
init(l-1);
}
for(int i=l;i<r;i++)
{
if(p<pq[i].top())
{
int prv=p;
p=pq[i].top();
pq[i].pop();
pq[i].ep(prv);
rn[i].ep(prv);
}
}
if(r*sz<t)
{
app(r);
for(int i=r*sz;i<t;i++)
if(p<x[i])
swap(p,x[i]);
init(r);
}
return p;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int q;
cin>>n>>q;
for(int i=0;i<n;i++)
cin>>x[i];
while(n%sz!=0)
x[n++]=-1;
init();
while(q-->0)
{
int s,t,p;
cin>>s>>t>>p;
if(s>t)
cout<<solve(0,t,solve(s-1,n,p))<<'\n';
else
cout<<solve(s-1,t,p)<<'\n';
}
cout.flush();
return 0;
}
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