Submission #157734

#	Time	Username	Problem	Language	Result	Execution time	Memory
157734		TadijaSebez	Sushi (JOI16_sushi)	C++11	5 / 100	432 ms	41968 KiB

sushi

#include <bits/stdc++.h>
using namespace std;
const int N=400050;
const int S=447;
set<int> pos[N/S];
multiset<pair<int,int>> st[N/S];
int a[N];
int Push(int B, int x)
{
	st[B].insert({x,0});
	int p;tie(x,p)=*st[B].rbegin();
	st[B].erase(--st[B].end());
	if(p) pos[B].insert(-p);
	return x;
}
void BuildBlock(int B, int l, int r)
{
	pos[B].clear();
	for(int i=l;i<=r;i++) st[B].insert({a[i],-i});
}
void BreakBlock(int B)
{
	while(st[B].size())
	{
		int p=-1;
		if(pos[B].size()) p=*pos[B].rbegin(),pos[B].erase(--pos[B].end());
		while(st[B].size() && -st[B].rbegin()->second>p)
		{
			a[-st[B].rbegin()->second]=st[B].rbegin()->first;
			st[B].erase(--st[B].end());
		}
		if(~p)
		{
			int x,y;tie(x,y)=*st[B].rbegin();y=-y;
			st[B].erase(--st[B].end());
			if(y) pos[B].insert(y);
			a[p]=x;
		}
	}
}
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:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&q);
  ~~~~~^~~~~~~~~~~~~~~
sushi.cpp:68:28: 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:73:8: 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: 5 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 80