Submission #154799

#	Time	Username	Problem	Language	Result	Execution time	Memory
154799		TadijaSebez	Matryoshka (JOI16_matryoshka)	C++11	100 / 100	998 ms	77308 KiB

matryoshka

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=200050;
const int M=N*60;
const int lim=1e9;
int a[N],b[N],x[N],y[N];
int uid[N],qid[N],ans[N];
int ls[M],rs[M],tsz,root[2],sum[M];
void Set(int &c, int ss, int se, int qi)
{
	if(!c) c=++tsz;
	sum[c]++;
	if(ss==se) return;
	int mid=ss+se>>1;
	if(qi<=mid) Set(ls[c],ss,mid,qi);
	else Set(rs[c],mid+1,se,qi);
}
int Get(int c, int ss, int se, int qs, int qe)
{
	if(qs>qe || qs>se || ss>qe) return 0;
	if(qs<=ss && qe>=se) return sum[c];
	int mid=ss+se>>1;
	return Get(ls[c],ss,mid,qs,qe)+Get(rs[c],mid+1,se,qs,qe);
}
int main()
{
	int n,q;
	scanf("%i %i",&n,&q);
	for(int i=1;i<=n;i++) scanf("%i %i",&a[i],&b[i]),uid[i]=i;
	for(int i=1;i<=q;i++) scanf("%i %i",&x[i],&y[i]),qid[i]=i;
	sort(uid+1,uid+1+n,[&](int i, int j){ return a[i]>a[j] || (a[i]==a[j] && b[i]>b[j]);});
	sort(qid+1,qid+1+q,[&](int i, int j){ return x[i]>x[j];});
	multiset<int> st;
	int k=1;
	for(int i=1,j;i<=n;i=j)
	{
		while(k<=q && (x[qid[k]]>a[uid[i]]))
		{
			ans[qid[k]]=Get(root[0],0,lim,0,y[qid[k]])-Get(root[1],0,lim,0,y[qid[k]]);
			k++;
		}
		vector<int> tmp;
		for(j=i;j<=n && a[uid[i]]==a[uid[j]];j++)
		{
			auto it=st.upper_bound(b[uid[j]]);
			if(it!=st.end())
			{
				Set(root[1],0,lim,*it);
				st.erase(it);
			}
			Set(root[0],0,lim,b[uid[j]]);
			tmp.pb(b[uid[j]]);
		}
		for(int l:tmp) st.insert(l);
	}
	while(k<=q)
	{
		ans[qid[k]]=Get(root[0],0,lim,0,y[qid[k]])-Get(root[1],0,lim,0,y[qid[k]]);
		k++;
	}
	for(int i=1;i<=q;i++) printf("%i\n",ans[i]);
	return 0;
}

Compilation message (stderr)

matryoshka.cpp: In function 'void Set(int&, int, int, int)':
matryoshka.cpp:15:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=ss+se>>1;
          ~~^~~
matryoshka.cpp: In function 'int Get(int, int, int, int, int)':
matryoshka.cpp:23:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=ss+se>>1;
          ~~^~~
matryoshka.cpp: In function 'int main()':
matryoshka.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&q);
  ~~~~~^~~~~~~~~~~~~~~
matryoshka.cpp:30:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%i %i",&a[i],&b[i]),uid[i]=i;
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
matryoshka.cpp:31:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=q;i++) scanf("%i %i",&x[i],&y[i]),qid[i]=i;
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25
• Subtask 4: 49 / 49