Submission #157761

#	Time	Username	Problem	Language	Result	Execution time	Memory
157761		TadijaSebez	Sushi (JOI16_sushi)	C++11	100 / 100	9197 ms	7056 KiB

sushi

#include <bits/stdc++.h>
using namespace std;
const int N=400050;
const int S=777;
const int M=N/S+1;
const int Q=25050;
priority_queue<pair<int,int>> st[M];
int a[N],n,q;
bool mark[N];
int Push(int B, int x)
{
	st[B].push({x,0});
	int p;tie(x,p)=st[B].top();
	st[B].pop();
	if(p) mark[-p]=1;
	return x;
}
void BuildBlock(int B, int l, int r){ for(int i=l;i<=r;i++) st[B].push({a[i],-i}),mark[i]=0;}
void BreakBlock(int B)
{
	int l=B*S,r=min((B+1)*S,n)-1;
	for(int i=r;i>=l;i--)
	{
		if(mark[i])
		{
			int x,y;
			do
			{
				tie(x,y)=st[B].top();
				st[B].pop();
			}while(-y>i);
			a[i]=x;
			if(y) mark[-y]=1;
		}
	}
	while(st[B].size()) st[B].pop();
}
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:63:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&q);
  ~~~~~^~~~~~~~~~~~~~~
sushi.cpp:64:28: 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:69:8: 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: 15 / 15
• Subtask 3: 80 / 80