Submission #157705

#	Time	Username	Problem	Language	Result	Execution time	Memory
157705		TadijaSebez	Sushi (JOI16_sushi)	C++11	0 / 100	86 ms	8440 KiB

sushi

#include <bits/stdc++.h>
using namespace std;
const int N=400050;
const int S=447;
vector<int> pos[N/S];
multiset<int> st[N/S];
int a[N];
int Push(int B, int x)
{
	st[B].insert(x);
	x=*st[B].rbegin();
	st[B].erase(--st[B].end());
	return x;
}
void BuildBlock(int B, int l, int r)
{
	pos[B].clear();
	for(int i=r;i>=l;i--)
	{
		while(pos[B].size() && a[pos[B].back()]<a[i]) pos[B].pop_back();
		pos[B].push_back(i);
	}
	for(int i:pos[B]) st[B].insert(a[i]);
}
void BreakBlock(int B)
{
	while(pos[B].size())
	{
		a[pos[B].back()]=*st[B].begin();
		pos[B].pop_back();
		st[B].erase(st[B].begin());
	}
}
int n,q;
int Push(int B, int l, int r, int x)
{
	BreakBlock(B);
	for(int i=l;i<=r;i++) if(a[i]>x) swap(a[i],x);
	BuildBlock(B,B*S,min((B+1)*S,n)-1);
	return x;
}
void BuildAll(){ for(int l=0;l<n;l+=S) BuildBlock(l/S,l,min(l+S,n)-1);}
int Query(int l, int r, int x)
{
	int L=l/S,R=r/S;
	if(L==R)
	{
		x=Push(L,l,r,x);
	}
	else
	{
		x=Push(L,l,L*S+S-1,x);
		for(int i=L+1;i<R;i++) x=Push(i,x);
		x=Push(R,R*S,r,x);
	}
	return x;
}
int main()
{
	scanf("%i %i",&n,&q);
	for(int i=0;i<n;i++) scanf("%i",&a[i]);
	BuildAll();
	while(q--)
	{
		int l,r,x;
		scanf("%i %i %i",&l,&r,&x);
		l--;r--;
		if(l<=r) x=Query(l,r,x);
		else x=Query(0,r,Query(l,n-1,x));
		printf("%i\n",x);
	}
	return 0;
}

Compilation message (stderr)

sushi.cpp: In function 'int main()':
sushi.cpp:60:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&q);
  ~~~~~^~~~~~~~~~~~~~~
sushi.cpp:61:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0;i<n;i++) scanf("%i",&a[i]);
                       ~~~~~^~~~~~~~~~~~
sushi.cpp:66:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%i %i %i",&l,&r,&x);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 80